diff --git a/StructureHelper/Infrastructure/UI/DataContexts/CircleViewPrimitive.cs b/StructureHelper/Infrastructure/UI/DataContexts/CircleViewPrimitive.cs
index 9523ad0..748b9ed 100644
--- a/StructureHelper/Infrastructure/UI/DataContexts/CircleViewPrimitive.cs
+++ b/StructureHelper/Infrastructure/UI/DataContexts/CircleViewPrimitive.cs
@@ -53,5 +53,12 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
             OnPropertyChanged(nameof(PrimitiveLeft));
             OnPropertyChanged(nameof(PrimitiveTop));
         }
+        public override void Refresh()
+        {
+            OnPropertyChanged(nameof(Diameter));
+            OnPropertyChanged(nameof(PrimitiveLeft));
+            OnPropertyChanged(nameof(PrimitiveTop));
+            base.Refresh();
+        }
     }
 }
diff --git a/StructureHelper/Infrastructure/UI/DataContexts/PointViewPrimitive.cs b/StructureHelper/Infrastructure/UI/DataContexts/PointViewPrimitive.cs
index cff5884..bc5d969 100644
--- a/StructureHelper/Infrastructure/UI/DataContexts/PointViewPrimitive.cs
+++ b/StructureHelper/Infrastructure/UI/DataContexts/PointViewPrimitive.cs
@@ -42,7 +42,11 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
         {
             return primitive;
         }
-
+        public override void Refresh()
+        {
+            RefreshPlacement();
+            base.Refresh();
+        }
         private void RefreshPlacement()
         {
             OnPropertyChanged(nameof(Area));
diff --git a/StructureHelper/Infrastructure/UI/DataContexts/PrimitiveBase.cs b/StructureHelper/Infrastructure/UI/DataContexts/PrimitiveBase.cs
index 931a22b..b280374 100644
--- a/StructureHelper/Infrastructure/UI/DataContexts/PrimitiveBase.cs
+++ b/StructureHelper/Infrastructure/UI/DataContexts/PrimitiveBase.cs
@@ -39,19 +39,19 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
         }
         public double CenterX
         {
-            get => primitive.CenterX;
+            get => primitive.Center.X;
             set
             {
-                primitive.CenterX = value;
+                primitive.Center.X = value;
                 OnPropertyChanged(nameof(CenterX));
             }
         }
         public double CenterY
         {
-            get => primitive.CenterY;
+            get => primitive.Center.Y;
             set
             {
-                primitive.CenterY = value;
+                primitive.Center.Y = value;
                 OnPropertyChanged(nameof(CenterY));
                 OnPropertyChanged(nameof(InvertedCenterY));
             }
@@ -261,5 +261,16 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
         {
             OnPropertyChanged(nameof(Color));
         }
+        public virtual void Refresh()
+        {
+            OnPropertyChanged(nameof(Name));
+            OnPropertyChanged(nameof(Color));
+            OnPropertyChanged(nameof(CenterX));
+            OnPropertyChanged(nameof(CenterY));
+            OnPropertyChanged(nameof(SetMaterialColor));
+            OnPropertyChanged(nameof(Triangulate));
+            OnPropertyChanged(nameof(PrimitiveWidth));
+            OnPropertyChanged(nameof(PrimitiveHeight));
+        }
     }
 }
diff --git a/StructureHelper/Infrastructure/UI/DataContexts/PrimitiveOperations.cs b/StructureHelper/Infrastructure/UI/DataContexts/PrimitiveOperations.cs
index ff76ad7..1f963a0 100644
--- a/StructureHelper/Infrastructure/UI/DataContexts/PrimitiveOperations.cs
+++ b/StructureHelper/Infrastructure/UI/DataContexts/PrimitiveOperations.cs
@@ -35,14 +35,14 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
                 var circle = primitive as ICirclePrimitive;
                 viewItem = new CircleViewPrimitive(circle);
             }
-            else if (primitive is IPointPrimitive & primitive is not ReinforcementPrimitive)
+            else if (primitive is IPointPrimitive & primitive is not RebarPrimitive)
             {
                 var point = primitive as IPointPrimitive;
                 viewItem = new PointViewPrimitive(point);
             }
-            else if (primitive is ReinforcementPrimitive)
+            else if (primitive is RebarPrimitive)
             {
-                var point = primitive as ReinforcementPrimitive;
+                var point = primitive as RebarPrimitive;
                 viewItem = new ReinforcementViewPrimitive(point);
             }
             else throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknown + $". Actual type: {primitive.GetType()}");
diff --git a/StructureHelper/Infrastructure/UI/DataContexts/RectangleViewPrimitive.cs b/StructureHelper/Infrastructure/UI/DataContexts/RectangleViewPrimitive.cs
index 3f08950..f286553 100644
--- a/StructureHelper/Infrastructure/UI/DataContexts/RectangleViewPrimitive.cs
+++ b/StructureHelper/Infrastructure/UI/DataContexts/RectangleViewPrimitive.cs
@@ -42,7 +42,12 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
             primitive = _primitive;
             DivisionViewModel = new HasDivisionViewModel(primitive);
         }
-
+        public override void Refresh()
+        {
+            OnPropertyChanged(nameof(PrimitiveLeft));
+            OnPropertyChanged(nameof(PrimitiveTop));
+            base.Refresh();
+        }
         public override INdmPrimitive GetNdmPrimitive()
         {           
             return primitive;
diff --git a/StructureHelper/Infrastructure/UI/DataContexts/ReinforcementViewPrimitive.cs b/StructureHelper/Infrastructure/UI/DataContexts/ReinforcementViewPrimitive.cs
index 4d869a6..e644160 100644
--- a/StructureHelper/Infrastructure/UI/DataContexts/ReinforcementViewPrimitive.cs
+++ b/StructureHelper/Infrastructure/UI/DataContexts/ReinforcementViewPrimitive.cs
@@ -9,7 +9,7 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
 {
     public class ReinforcementViewPrimitive : PointViewPrimitive, IHasHostPrimitive
     {
-        ReinforcementPrimitive primitive;
+        RebarPrimitive primitive;
 
         public INdmPrimitive HostPrimitive
         {
@@ -21,9 +21,14 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
             }
         }
 
-        public ReinforcementViewPrimitive(ReinforcementPrimitive _primitive) : base(_primitive)
+        public ReinforcementViewPrimitive(RebarPrimitive _primitive) : base(_primitive)
         {
             primitive = _primitive;
         }
+        public override void Refresh()
+        {
+            OnPropertyChanged(nameof(HostPrimitive));
+            base.Refresh();
+        }
     }
 }
diff --git a/StructureHelper/Libraries/LoaderCalculator.dll b/StructureHelper/Libraries/LoaderCalculator.dll
index 9a7406a..a41eb6e 100644
Binary files a/StructureHelper/Libraries/LoaderCalculator.dll and b/StructureHelper/Libraries/LoaderCalculator.dll differ
diff --git a/StructureHelper/Models/Primitives/Factories/PrimitiveFactory.cs b/StructureHelper/Models/Primitives/Factories/PrimitiveFactory.cs
deleted file mode 100644
index 3f68c55..0000000
--- a/StructureHelper/Models/Primitives/Factories/PrimitiveFactory.cs
+++ /dev/null
@@ -1,81 +0,0 @@
-using StructureHelper.Infrastructure.UI.DataContexts;
-using StructureHelper.Models.Materials;
-using StructureHelperCommon.Infrastructures.Enums;
-using StructureHelperLogics.Models.Primitives;
-using StructureHelperLogics.Models.Templates.RCs;
-using StructureHelperLogics.NdmCalculations.Primitives;
-using System;
-using System.Collections.Generic;
-using System.Data;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StructureHelper.Models.Primitives.Factories
-{
-    internal static class PrimitiveFactory
-    {
-        public static IEnumerable<PrimitiveBase> GetRectangleRCElement(RectangleBeamTemplate template, IHeadMaterial concrete, IHeadMaterial reinforcement)
-        {
-            List<PrimitiveBase> primitives = new List<PrimitiveBase>();
-            var rect = template.Shape as StructureHelperCommon.Models.Shapes.RectangleShape;
-            var width = rect.Width;
-            var height = rect.Height;
-            var area1 = Math.PI * template.BottomDiameter * template.BottomDiameter / 4d;
-            var area2 = Math.PI * template.TopDiameter * template.TopDiameter / 4d;
-            var gap = template.CoverGap;
-
-            double[] xs = new double[] { -width / 2 + gap, width / 2 - gap };
-            double[] ys = new double[] { -height / 2 + gap, height / 2 - gap };
-
-            var rectangle = new RectanglePrimitive() { Width = width, Height = height, Name = "Concrete block" };
-            primitives.Add(new RectangleViewPrimitive(rectangle) { HeadMaterial = concrete});
-            var point = new PointPrimitive() { CenterX = xs[0], CenterY = ys[0], Area = area1};
-            var viewPoint = new PointViewPrimitive(point) { HeadMaterial = reinforcement, Name = "Left bottom point" };
-            viewPoint.RegisterDeltas(xs[0], ys[0]);
-            primitives.Add(viewPoint);
-            point = new PointPrimitive() {CenterX = xs[1], CenterY = ys[0], Area = area1 };
-            viewPoint = new PointViewPrimitive(point) { HeadMaterial = reinforcement, Name = "Right bottom point" };
-            primitives.Add(viewPoint);
-            point = new PointPrimitive() { CenterX = xs[0], CenterY = ys[1], Area = area2 };
-            viewPoint = new PointViewPrimitive(point) { HeadMaterial = reinforcement, Name = "Left top point" };
-            primitives.Add(viewPoint);
-            point = new PointPrimitive() { CenterX = xs[1], CenterY = ys[1], Area = area2 };
-            viewPoint = new PointViewPrimitive(point) { HeadMaterial = reinforcement, Name = "Right top point" };
-            viewPoint.RegisterDeltas(xs[1], ys[1]);
-            primitives.Add(viewPoint);
-
-            if (template.WidthCount > 2)
-            {
-                int count = template.WidthCount - 1;
-                double dist = (xs[1] - xs[0]) / count;
-                for (int i = 1; i < count; i++)
-                {
-                    point = new PointPrimitive() {CenterX = xs[0] + dist * i, CenterY = ys[0], Area = area1 };
-                    viewPoint = new PointViewPrimitive(point) { HeadMaterial = reinforcement, Name = $"Bottom point {i}" };
-                    primitives.Add(viewPoint);
-
-                    point = new PointPrimitive() { CenterX = xs[0] + dist * i, CenterY = ys[1], Area = area2 };
-                    viewPoint = new PointViewPrimitive(point) { HeadMaterial = reinforcement, Name = $"Top point {i}" };
-                    primitives.Add(viewPoint);
-                }
-            }
-            if (template.HeightCount > 2)
-            {
-                int count = template.HeightCount - 1;
-                double dist = (ys[1] - ys[0]) / count;
-                for (int i = 1; i < count; i++)
-                {
-                    point = new PointPrimitive() {CenterX = xs[0], CenterY = ys[0] + dist * i, Area = area1 };
-                    viewPoint = new PointViewPrimitive(point) { HeadMaterial = reinforcement, Name = $"Left point {i}" };
-                    primitives.Add(viewPoint);
-
-                    point = new PointPrimitive() { CenterX = xs[1], CenterY = ys[0] + dist * i, Area = area1 };
-                    viewPoint = new PointViewPrimitive(point) { HeadMaterial = reinforcement, Name = $"Right point {i}" };
-                    primitives.Add(viewPoint);
-                }
-            }
-            return primitives;
-        }
-    }
-}
diff --git a/StructureHelper/Services/ResultViewers/ShowAnchorageResult.cs b/StructureHelper/Services/ResultViewers/ShowAnchorageResult.cs
index 0ac9c22..4f90733 100644
--- a/StructureHelper/Services/ResultViewers/ShowAnchorageResult.cs
+++ b/StructureHelper/Services/ResultViewers/ShowAnchorageResult.cs
@@ -50,9 +50,9 @@ namespace StructureHelper.Services.ResultViewers
             List<IValuePrimitive> primitives = new List<IValuePrimitive>();
             foreach (var item in ndmPrimitives)
             {
-                if (item is ReinforcementPrimitive)
+                if (item is RebarPrimitive)
                 {
-                    var primitive = item as ReinforcementPrimitive;
+                    var primitive = item as RebarPrimitive;
                     var inputData = InputDataFactory.GetInputData(primitive, strainMatrix, limitState, calcTerm, 1d);
                     if (fullStrength == true)
                     {
@@ -73,9 +73,9 @@ namespace StructureHelper.Services.ResultViewers
             List<IValuePrimitive> primitives = new List<IValuePrimitive>();
             foreach (var item in ndmPrimitives)
             {
-                if (item is ReinforcementPrimitive)
+                if (item is RebarPrimitive)
                 {
-                    var primitive = item as ReinforcementPrimitive;
+                    var primitive = item as RebarPrimitive;
                     var inputData = InputDataFactory.GetInputData(primitive, strainMatrix, limitState, calcTerm, 1d);
                     var calculator = new AnchorageCalculator(inputData);
                     var val = calculator.GetBaseDevLength() * UnitConstants.Length;
@@ -92,9 +92,9 @@ namespace StructureHelper.Services.ResultViewers
             List<IValuePrimitive> primitives = new List<IValuePrimitive>();
             foreach (var item in ndmPrimitives)
             {
-                if (item is ReinforcementPrimitive)
+                if (item is RebarPrimitive)
                 {
-                    var primitive = item as ReinforcementPrimitive;
+                    var primitive = item as RebarPrimitive;
                     var inputData = InputDataFactory.GetInputData(primitive, strainMatrix, limitState, calcTerm, 1d);
                     if (fullStrength == true)
                     {
@@ -116,9 +116,9 @@ namespace StructureHelper.Services.ResultViewers
             List<IValuePrimitive> primitives = new List<IValuePrimitive>();
             foreach (var item in ndmPrimitives)
             {
-                if (item is ReinforcementPrimitive)
+                if (item is RebarPrimitive)
                 {
-                    var primitive = item as ReinforcementPrimitive;
+                    var primitive = item as RebarPrimitive;
                     var inputData = InputDataFactory.GetInputData(primitive, strainMatrix, limitState, calcTerm, lapperdCountRate);
                     if (fullStrength == true)
                     {
@@ -138,8 +138,8 @@ namespace StructureHelper.Services.ResultViewers
         {
             var valuePrimitive = new FieldVisualizer.Entities.Values.Primitives.CirclePrimitive()
             {
-                CenterX = primitive.CenterX,
-                CenterY = primitive.CenterY,
+                CenterX = primitive.Center.X,
+                CenterY = primitive.Center.Y,
                 Diameter = Math.Sqrt(primitive.Area / Math.PI) * 2,
                 Value = val
             };
diff --git a/StructureHelper/StructureHelper.csproj b/StructureHelper/StructureHelper.csproj
index 2a86384..76dd3e7 100644
--- a/StructureHelper/StructureHelper.csproj
+++ b/StructureHelper/StructureHelper.csproj
@@ -50,6 +50,7 @@
 
   <ItemGroup>
     <Folder Include="Documentation\Manuals\" />
+    <Folder Include="Infrastructure\UI\DataContexts\Logics\" />
   </ItemGroup>
 
 </Project>
diff --git a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml
index 411ecb2..32c082d 100644
--- a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml
+++ b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml
@@ -16,7 +16,7 @@
     <Grid>
         <Grid.RowDefinitions>
             <RowDefinition/>
-            <RowDefinition Height="20"/>
+            <RowDefinition Height="35"/>
         </Grid.RowDefinitions>
         <TabControl>
             <TabItem Header="General">
@@ -92,5 +92,6 @@
                 </Grid>
             </TabItem>
         </TabControl>
+        <ContentControl Grid.Row="1" ContentTemplate="{StaticResource OkCancelButtons}" Content="{Binding}"/>
     </Grid>
 </Window>
diff --git a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml.cs b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml.cs
index a92b889..0e7ae6b 100644
--- a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml.cs
+++ b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForceCalculatorView.xaml.cs
@@ -25,6 +25,7 @@ namespace StructureHelper.Windows.CalculationWindows.CalculatorsViews.ForceCalcu
         public ForceCalculatorView(ForceCalculatorViewModel _forceCalculatorViewModel)
         {
             viewModel = _forceCalculatorViewModel;
+            viewModel.ParentWindow = this;
             DataContext = viewModel;
             InitializeComponent();
         }
diff --git a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
index ef7698c..4eda487 100644
--- a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
+++ b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
@@ -46,6 +46,7 @@
             <Button Margin="3" Content="Set Prestrain" ToolTip="Set strains as auto prestrain" Command="{Binding SetPrestrainCommand}"/>
             <Button Margin="3" Content="Anchorage" ToolTip="Set strains as auto prestrain" Command="{Binding ShowAnchorageCommand}"/>
             <Button Margin="3" Content="Geometry" ToolTip="Show Geometry Properties" Command="{Binding ShowGeometryResultCommand}"/>
+            <Button Margin="3" Content="Fcrc" ToolTip="Show crack force" Command="{Binding ShowCrackResultCommand}"/>
         </StackPanel>
     </Grid>
 </Window>
diff --git a/StructureHelper/Windows/MainWindow/MainView.xaml b/StructureHelper/Windows/MainWindow/MainView.xaml
index a1fa1d6..e8ae614 100644
--- a/StructureHelper/Windows/MainWindow/MainView.xaml
+++ b/StructureHelper/Windows/MainWindow/MainView.xaml
@@ -127,7 +127,7 @@
                                 <MenuItem Header="Add">
                                     <Button Content="Rectangle" Command="{Binding Add}" CommandParameter="{x:Static enums:PrimitiveType.Rectangle}"/>
                                     <Button Content="Circle" Command="{Binding Add}" CommandParameter="{x:Static enums:PrimitiveType.Circle}"/>
-                                    <Button Content="Reinforcement" Command="{Binding Add}" CommandParameter="{x:Static enums:PrimitiveType.Reinforcement}"/>
+                                    <Button Content="Rebar" Command="{Binding Add}" CommandParameter="{x:Static enums:PrimitiveType.Reinforcement}"/>
                                     <Button Content="Point" Command="{Binding Add}" CommandParameter="{x:Static enums:PrimitiveType.Point}"/>
                                 </MenuItem>
                             </ContextMenu>
@@ -183,7 +183,7 @@
                                 <MenuItem Header="Add">
                                     <Button Content="Rectangle" Command="{Binding PrimitiveLogic.Add}" CommandParameter="{x:Static enums:PrimitiveType.Rectangle}"/>
                                     <Button Content="Circle" Command="{Binding PrimitiveLogic.Add}" CommandParameter="{x:Static enums:PrimitiveType.Circle}"/>
-                                    <Button Content="Reinforcement" Command="{Binding PrimitiveLogic.Add}" CommandParameter="{x:Static enums:PrimitiveType.Reinforcement}"/>
+                                    <Button Content="Rebar" Command="{Binding PrimitiveLogic.Add}" CommandParameter="{x:Static enums:PrimitiveType.Reinforcement}"/>
                                     <Button Content="Point" Command="{Binding PrimitiveLogic.Add}" CommandParameter="{x:Static enums:PrimitiveType.Point}"/>
                                 </MenuItem>
                                 <MenuItem Header="Templates">
diff --git a/StructureHelper/Windows/PrimitivePropertiesWindow/PrimitivePropertiesView.xaml b/StructureHelper/Windows/PrimitivePropertiesWindow/PrimitivePropertiesView.xaml
index 3ee8239..e44ee5c 100644
--- a/StructureHelper/Windows/PrimitivePropertiesWindow/PrimitivePropertiesView.xaml
+++ b/StructureHelper/Windows/PrimitivePropertiesWindow/PrimitivePropertiesView.xaml
@@ -111,122 +111,129 @@
             </Expander>
         </DataTemplate>
     </Window.Resources>
-    <TabControl>
-        <TabItem Header="Main">
-            <ScrollViewer>
-                <StackPanel x:Name="StpProperties">
-                    <Expander Header="Common properties" IsExpanded="True">
-                        <Grid>
-                            <Grid.RowDefinitions>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                            </Grid.RowDefinitions>
-                            <Grid.ColumnDefinitions>
-                                <ColumnDefinition Width="100"/>
-                                <ColumnDefinition/>
-                            </Grid.ColumnDefinitions>
-                            <TextBlock Grid.Row="0" Text="Name"/>
-                            <TextBlock Grid.Row="1" Text="Name of material"/>
-                            <TextBlock Grid.Row="2" Text="Center X"/>
-                            <TextBlock Grid.Row="3" Text="Center Y"/>
-                            <TextBlock Grid.Row="4" Text="Triangulate"/>
-                            <TextBox Grid.Row="0" Grid.Column="1" Margin="1" Text="{Binding Name}"/>
-                            <ComboBox Grid.Row="1" Grid.Column="1" ItemsSource="{Binding HeadMaterials}" SelectedItem="{Binding PrimitiveMaterial}">
-                                <ComboBox.ItemTemplate>
-                                    <DataTemplate>
-                                        <Grid>
-                                            <Grid.ColumnDefinitions>
-                                                <ColumnDefinition Width="20"/>
-                                                <ColumnDefinition/>
-                                            </Grid.ColumnDefinitions>
-                                            <Rectangle Grid.Column="0" Margin="3">
-                                                <Rectangle.Fill>
-                                                    <SolidColorBrush Color="{Binding Color}"/>
-                                                </Rectangle.Fill>
-                                            </Rectangle>
-                                            <TextBlock Grid.Column="1" Text="{Binding Name}"/>
-                                        </Grid>
-                                    </DataTemplate>
-                                </ComboBox.ItemTemplate>
-                            </ComboBox>
-                            <TextBox Grid.Row="2" Grid.Column="1" Margin="1" Text="{Binding CenterX, Converter={StaticResource LengthConverter}, ValidatesOnExceptions=True}"/>
-                            <TextBox Grid.Row="3" Grid.Column="1" Margin="1" Text="{Binding CenterY, Converter={StaticResource LengthConverter}, ValidatesOnExceptions=True}"/>
-                            <CheckBox Grid.Row="4" Grid.Column="1" IsChecked="{Binding Triangulate}"/>
-                        </Grid>
-                    </Expander>
-                    <Expander Header="Prestrain" IsExpanded="False">
-                        <Grid>
-                            <Grid.RowDefinitions>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                                <RowDefinition Height="22"/>
-                            </Grid.RowDefinitions>
-                            <Grid.ColumnDefinitions>
-                                <ColumnDefinition Width="100"/>
-                                <ColumnDefinition/>
-                            </Grid.ColumnDefinitions>
-                            <TextBlock Grid.Row="0" Grid.Column="1" Text="User's / Auto" HorizontalAlignment="Center"/>
-                            <TextBlock Grid.Row="1" Text="k_x"/>
-                            <TextBlock Grid.Row="3" Text="k_y"/>
-                            <TextBlock Grid.Row="5" Text="epsilon_z"/>
-                            <TextBox Grid.Row="1" Grid.Column="1" Margin="1" Text="{Binding PrestrainKx, Converter={StaticResource Curvature}, ValidatesOnDataErrors=True}"/>
-                            <TextBox Grid.Row="3" Grid.Column="1" Margin="1" Text="{Binding PrestrainKy, Converter={StaticResource Curvature}, ValidatesOnDataErrors=True}"/>
-                            <TextBox Grid.Row="5" Grid.Column="1" Margin="1" Text="{Binding PrestrainEpsZ, Converter={StaticResource PlainDouble}, ValidatesOnDataErrors=True}"/>
-                            <TextBox Grid.Row="2" Grid.Column="1" Margin="1" IsEnabled="False" Text="{Binding AutoPrestrainKx, Converter={StaticResource Curvature}, Mode=OneWay}"/>
-                            <TextBox Grid.Row="4" Grid.Column="1" Margin="1" IsEnabled="False" Text="{Binding AutoPrestrainKy, Converter={StaticResource Curvature}, Mode=OneWay}"/>
-                            <TextBox Grid.Row="6" Grid.Column="1" Margin="1" IsEnabled="False" Text="{Binding AutoPrestrainEpsZ, Converter={StaticResource PlainDouble}, Mode=OneWay}"/>
-                        </Grid>
-                    </Expander>
-                </StackPanel>
-            </ScrollViewer>
-        </TabItem>
-        <TabItem Header="Visual">
-            <Grid>
-                <Grid.RowDefinitions>
-                    <RowDefinition Height="22"/>
-                    <RowDefinition Height="22"/>
-                    <RowDefinition Height="22"/>
-                    <RowDefinition Height="30"/>
-                    <RowDefinition Height="22"/>
-                    <RowDefinition Height="22"/>
-                </Grid.RowDefinitions>
-                <Grid.ColumnDefinitions>
-                    <ColumnDefinition Width="100"/>
-                    <ColumnDefinition/>
-                </Grid.ColumnDefinitions>
-                <TextBlock Grid.Row="0" Text="Visible"/>
-                <TextBlock Grid.Row="1" Text="Material color"/>
-                <TextBlock Grid.Row="2" Text="Z-index (integer)"/>
-                <TextBlock Grid.Row="3" Text="Opacity"/>
-                <CheckBox Grid.Column="1" IsChecked="{Binding IsVisible}" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="10,0,0,0"/>
-                <StackPanel Grid.Row="1" Grid.Column="1" Orientation="Horizontal" HorizontalAlignment="Right">
-                    <CheckBox IsChecked="{Binding SetMaterialColor}" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,0,20,0"/>
-                    <Rectangle Width="50" Margin="5,0,10,0">
-                        <Rectangle.Fill>
-                            <SolidColorBrush Color="{Binding Color}"/>
-                        </Rectangle.Fill>
-                    </Rectangle>
-                    <Button Width="50" Content="..." Command="{Binding EditColorCommand}"/>
-                </StackPanel>
-                <TextBox Grid.Row="2" Grid.Column="1" Margin="1" Text="{Binding ZIndex}"/>
-                <Grid Grid.Row="3" Grid.Column="1">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="35"/>
+        </Grid.RowDefinitions>
+        <TabControl>
+            <TabItem Header="Main">
+                <ScrollViewer>
+                    <StackPanel x:Name="StpProperties">
+                        <Expander Header="Common properties" IsExpanded="True">
+                            <Grid>
+                                <Grid.RowDefinitions>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                </Grid.RowDefinitions>
+                                <Grid.ColumnDefinitions>
+                                    <ColumnDefinition Width="100"/>
+                                    <ColumnDefinition/>
+                                </Grid.ColumnDefinitions>
+                                <TextBlock Grid.Row="0" Text="Name"/>
+                                <TextBlock Grid.Row="1" Text="Name of material"/>
+                                <TextBlock Grid.Row="2" Text="Center X"/>
+                                <TextBlock Grid.Row="3" Text="Center Y"/>
+                                <TextBlock Grid.Row="4" Text="Triangulate"/>
+                                <TextBox Grid.Row="0" Grid.Column="1" Margin="1" Text="{Binding Name}"/>
+                                <ComboBox Grid.Row="1" Grid.Column="1" ItemsSource="{Binding HeadMaterials}" SelectedItem="{Binding PrimitiveMaterial}">
+                                    <ComboBox.ItemTemplate>
+                                        <DataTemplate>
+                                            <Grid>
+                                                <Grid.ColumnDefinitions>
+                                                    <ColumnDefinition Width="20"/>
+                                                    <ColumnDefinition/>
+                                                </Grid.ColumnDefinitions>
+                                                <Rectangle Grid.Column="0" Margin="3">
+                                                    <Rectangle.Fill>
+                                                        <SolidColorBrush Color="{Binding Color}"/>
+                                                    </Rectangle.Fill>
+                                                </Rectangle>
+                                                <TextBlock Grid.Column="1" Text="{Binding Name}"/>
+                                            </Grid>
+                                        </DataTemplate>
+                                    </ComboBox.ItemTemplate>
+                                </ComboBox>
+                                <TextBox Grid.Row="2" Grid.Column="1" Margin="1" Text="{Binding CenterX, Converter={StaticResource LengthConverter}, ValidatesOnExceptions=True}"/>
+                                <TextBox Grid.Row="3" Grid.Column="1" Margin="1" Text="{Binding CenterY, Converter={StaticResource LengthConverter}, ValidatesOnExceptions=True}"/>
+                                <CheckBox Grid.Row="4" Grid.Column="1" IsChecked="{Binding Triangulate}"/>
+                            </Grid>
+                        </Expander>
+                        <Expander Header="Prestrain" IsExpanded="False">
+                            <Grid>
+                                <Grid.RowDefinitions>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                    <RowDefinition Height="22"/>
+                                </Grid.RowDefinitions>
+                                <Grid.ColumnDefinitions>
+                                    <ColumnDefinition Width="100"/>
+                                    <ColumnDefinition/>
+                                </Grid.ColumnDefinitions>
+                                <TextBlock Grid.Row="0" Grid.Column="1" Text="User's / Auto" HorizontalAlignment="Center"/>
+                                <TextBlock Grid.Row="1" Text="k_x"/>
+                                <TextBlock Grid.Row="3" Text="k_y"/>
+                                <TextBlock Grid.Row="5" Text="epsilon_z"/>
+                                <TextBox Grid.Row="1" Grid.Column="1" Margin="1" Text="{Binding PrestrainKx, Converter={StaticResource Curvature}, ValidatesOnDataErrors=True}"/>
+                                <TextBox Grid.Row="3" Grid.Column="1" Margin="1" Text="{Binding PrestrainKy, Converter={StaticResource Curvature}, ValidatesOnDataErrors=True}"/>
+                                <TextBox Grid.Row="5" Grid.Column="1" Margin="1" Text="{Binding PrestrainEpsZ, Converter={StaticResource PlainDouble}, ValidatesOnDataErrors=True}"/>
+                                <TextBox Grid.Row="2" Grid.Column="1" Margin="1" IsEnabled="False" Text="{Binding AutoPrestrainKx, Converter={StaticResource Curvature}, Mode=OneWay}"/>
+                                <TextBox Grid.Row="4" Grid.Column="1" Margin="1" IsEnabled="False" Text="{Binding AutoPrestrainKy, Converter={StaticResource Curvature}, Mode=OneWay}"/>
+                                <TextBox Grid.Row="6" Grid.Column="1" Margin="1" IsEnabled="False" Text="{Binding AutoPrestrainEpsZ, Converter={StaticResource PlainDouble}, Mode=OneWay}"/>
+                            </Grid>
+                        </Expander>
+                    </StackPanel>
+                </ScrollViewer>
+            </TabItem>
+            <TabItem Header="Visual">
+                <Grid>
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="22"/>
+                        <RowDefinition Height="22"/>
+                        <RowDefinition Height="22"/>
+                        <RowDefinition Height="30"/>
+                        <RowDefinition Height="22"/>
+                        <RowDefinition Height="22"/>
+                    </Grid.RowDefinitions>
                     <Grid.ColumnDefinitions>
-                        <ColumnDefinition Width="50"/>
+                        <ColumnDefinition Width="100"/>
                         <ColumnDefinition/>
                     </Grid.ColumnDefinitions>
-                    <TextBox Text="{Binding Opacity, Converter={StaticResource PlainDouble}, ValidatesOnExceptions=True}" Margin="5"/>
-                    <Slider Grid.Column="1" Value="{Binding Opacity}" Maximum="100" TickPlacement="BottomRight" TickFrequency="10" IsSnapToTickEnabled="True" Margin="2"/>
+                    <TextBlock Grid.Row="0" Text="Visible"/>
+                    <TextBlock Grid.Row="1" Text="Material color"/>
+                    <TextBlock Grid.Row="2" Text="Z-index (integer)"/>
+                    <TextBlock Grid.Row="3" Text="Opacity"/>
+                    <CheckBox Grid.Column="1" IsChecked="{Binding IsVisible}" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="10,0,0,0"/>
+                    <StackPanel Grid.Row="1" Grid.Column="1" Orientation="Horizontal" HorizontalAlignment="Right">
+                        <CheckBox IsChecked="{Binding SetMaterialColor}" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,0,20,0"/>
+                        <Rectangle Width="50" Margin="5,0,10,0">
+                            <Rectangle.Fill>
+                                <SolidColorBrush Color="{Binding Color}"/>
+                            </Rectangle.Fill>
+                        </Rectangle>
+                        <Button Width="50" Content="..." Command="{Binding EditColorCommand}"/>
+                    </StackPanel>
+                    <TextBox Grid.Row="2" Grid.Column="1" Margin="1" Text="{Binding ZIndex}"/>
+                    <Grid Grid.Row="3" Grid.Column="1">
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="50"/>
+                            <ColumnDefinition/>
+                        </Grid.ColumnDefinitions>
+                        <TextBox Text="{Binding Opacity, Converter={StaticResource PlainDouble}, ValidatesOnExceptions=True}" Margin="5"/>
+                        <Slider Grid.Column="1" Value="{Binding Opacity}" Maximum="100" TickPlacement="BottomRight" TickFrequency="10" IsSnapToTickEnabled="True" Margin="2"/>
+                    </Grid>
                 </Grid>
-
-            </Grid>
-        </TabItem>
-    </TabControl>
+            </TabItem>
+        </TabControl>
+        <ContentControl Grid.Row="1" ContentTemplate="{StaticResource OkCancelButtons}" Content="{Binding}"/>
+    </Grid>
+    
     
 </Window>
diff --git a/StructureHelper/Windows/PrimitivePropertiesWindow/PrimitivePropertiesView.xaml.cs b/StructureHelper/Windows/PrimitivePropertiesWindow/PrimitivePropertiesView.xaml.cs
index 8228051..27a241f 100644
--- a/StructureHelper/Windows/PrimitivePropertiesWindow/PrimitivePropertiesView.xaml.cs
+++ b/StructureHelper/Windows/PrimitivePropertiesWindow/PrimitivePropertiesView.xaml.cs
@@ -1,23 +1,12 @@
 using StructureHelper.Infrastructure.Enums;
 using StructureHelper.Infrastructure.UI.DataContexts;
-using StructureHelper.Models.Materials;
 using StructureHelper.Windows.ViewModels.PrimitiveProperties;
 using StructureHelperLogics.Models.CrossSections;
-using StructureHelperLogics.Models.Materials;
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Shapes;
-using System.Xml.Linq;
 using PointViewPrimitive = StructureHelper.Infrastructure.UI.DataContexts.PointViewPrimitive;
 using RectangleViewPrimitive = StructureHelper.Infrastructure.UI.DataContexts.RectangleViewPrimitive;
 
@@ -34,6 +23,7 @@ namespace StructureHelper.Windows.PrimitiveProperiesWindow
         {
             this.primitive = primitive;
             viewModel = new PrimitivePropertiesViewModel(this.primitive, sectionRepository);
+            viewModel.ParentWindow = this;
             this.DataContext = viewModel;
             InitializeComponent();
             if (primitive is RectangleViewPrimitive) { AddPrimitiveProperties(PrimitiveType.Rectangle); }
diff --git a/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml b/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml
index a00b4fc..b777f00 100644
--- a/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml
+++ b/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml
@@ -14,9 +14,6 @@
             <RowDefinition Height="35"/>
         </Grid.RowDefinitions>
         <ContentControl ContentTemplate="{StaticResource ResourceKey=SelectItems}" Content="{Binding Items}"/>
-        <StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Right">
-            <Button Style="{StaticResource CancelButton}"/>
-            <Button Style="{StaticResource OkButton}" Click="Button_Click"/>
-        </StackPanel>
+        <ContentControl Grid.Row="1" ContentTemplate="{StaticResource OkCancelButtons}" Content="{Binding}"/>
     </Grid>
 </Window>
diff --git a/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml.cs b/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml.cs
index 022b98d..bec6558 100644
--- a/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml.cs
+++ b/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml.cs
@@ -20,16 +20,13 @@ namespace StructureHelper.Windows.PrimitivePropertiesWindow
     /// </summary>
     public partial class SelectPrimitivesView : Window
     {
+        SelectPrimitivesViewModel viewModel;
         public SelectPrimitivesView(SelectPrimitivesViewModel vm)
         {
+            viewModel = vm;
             InitializeComponent();
-            DataContext = vm;
-        }
-
-        private void Button_Click(object sender, RoutedEventArgs e)
-        {
-            this.DialogResult = true;
-            this.Close();
+            DataContext = viewModel;
+            viewModel.ParentWindow = this;
         }
     }
 }
diff --git a/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForceCalculatorViewModel.cs b/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForceCalculatorViewModel.cs
index 5fb2c36..71ef5d6 100644
--- a/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForceCalculatorViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForceCalculatorViewModel.cs
@@ -13,7 +13,7 @@ using System.Windows.Input;
 
 namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
 {
-    public class ForceCalculatorViewModel : ViewModelBase
+    public class ForceCalculatorViewModel : OkCancelViewModelBase
     {
         IEnumerable<INdmPrimitive> allowedPrimitives;
         IEnumerable<IForceAction> allowedForceCombinations;
diff --git a/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs b/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
index de66dd7..767014a 100644
--- a/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
@@ -26,6 +26,7 @@ using StructureHelperCommon.Services.Units;
 using StructureHelperLogics.NdmCalculations.Analyses;
 using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
 using StructureHelperLogics.NdmCalculations.Analyses.Geometry;
+using StructureHelperLogics.NdmCalculations.Cracking;
 using StructureHelperLogics.NdmCalculations.Primitives;
 using StructureHelperLogics.Services.NdmCalculations;
 using StructureHelperLogics.Services.NdmPrimitives;
@@ -34,6 +35,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Windows.Forms;
 using System.Windows.Input;
+using static System.Windows.Forms.VisualStyles.VisualStyleElement.Window;
 
 namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
 {
@@ -57,12 +59,13 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
         private RelayCommand setPrestrainCommand;
         private ICommand showAnchorageCommand;
         private ICommand showGeometryResultCommand;
+        private ICommand showGraphsCommand;
+        private ICommand showCrackResult;
 
         public IForcesResults ForcesResults
         {
             get => forcesResults;
         }
-
         public RelayCommand ShowIsoFieldCommand
         {
             get
@@ -77,7 +80,6 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
                 }, o => (SelectedResult != null) && SelectedResult.IsValid));
             }
         }
-
         public ICommand ExportToCSVCommand
         {
             get
@@ -100,13 +102,59 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
             var exportService = new ExportToFileService(inputData, logic);
             exportService.Export();
         }
-
-        private ICommand showGraphsCommand;
-
         public ICommand ShowGraphsCommand
         {
             get => showGraphsCommand ??= new RelayCommand(o => showGraphs());
         }
+        public ICommand ShowCrackResultCommand
+        {
+            get => showCrackResult ??= new RelayCommand(o =>
+            {
+                SafetyProcessor.RunSafeProcess(ShowCrackResult);
+            }, o => (SelectedResult != null) && SelectedResult.IsValid);
+        }
+
+        private void ShowCrackResult()
+        {
+            var limitState = SelectedResult.DesignForceTuple.LimitState;
+            var calcTerm = SelectedResult.DesignForceTuple.CalcTerm;
+            var calculator = new CrackForceCalculator();
+            calculator.EndTuple = SelectedResult.DesignForceTuple.ForceTuple;
+            calculator.NdmCollection = NdmPrimitivesService.GetNdms(ndmPrimitives, limitState, calcTerm);
+            //Act
+            calculator.Run();
+            var result = (CrackForceResult)calculator.Result;
+            if (result.IsValid)
+            {
+                var softLogic = new ExponentialSofteningLogic() { ForceRatio = result.ActualFactor };
+                string message = string.Empty;
+                if (result.IsSectionCracked)
+                {
+                    message += $"Actual crack factor {result.ActualFactor}\n";
+                    message += $"Softening crack factor PsiS={softLogic.SofteningFactor()}\n";
+                    message += $"M{firstAxisName}={result.ActualTuple.Mx}, M{secondAxisName}={result.ActualTuple.My}, N{thirdAxisName}={result.ActualTuple.Nz}";
+                }
+                else
+                {
+                    message += "Cracks are not apeared";
+                }
+                MessageBox.Show(
+                    message,
+                    "Crack results",
+                    MessageBoxButtons.OK,
+                    MessageBoxIcon.Information);
+            }
+            else
+            {
+                var errorVM = new ErrorProcessor()
+                {
+                    ShortText = "Error apeared while crack calculate",
+                    DetailText = result.Description
+                };
+                var wnd = new ErrorMessage(errorVM);
+                wnd.ShowDialog();
+            }
+        }
 
         private void showGraphs()
         {
diff --git a/StructureHelper/Windows/ViewModels/Errors/SafetyProcessor.cs b/StructureHelper/Windows/ViewModels/Errors/SafetyProcessor.cs
new file mode 100644
index 0000000..c754523
--- /dev/null
+++ b/StructureHelper/Windows/ViewModels/Errors/SafetyProcessor.cs
@@ -0,0 +1,30 @@
+using StructureHelper.Windows.Errors;
+using StructureHelperCommon.Infrastructures.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Windows.ViewModels.Errors
+{
+    internal static class SafetyProcessor
+    {
+        public static void RunSafeProcess(Action action, string shortText = "")
+        {
+            try
+            {
+                action.Invoke();
+            }
+            catch (Exception ex)
+            {
+                var vm = new ErrorProcessor()
+                {
+                    ShortText = shortText,
+                    DetailText = $"{ex}"
+                };
+                new ErrorMessage(vm).ShowDialog();
+            }
+        }
+    }
+}
diff --git a/StructureHelper/Windows/ViewModels/NdmCrossSections/AnalysisVewModelLogic.cs b/StructureHelper/Windows/ViewModels/NdmCrossSections/AnalysisVewModelLogic.cs
index 9f1650d..3eed068 100644
--- a/StructureHelper/Windows/ViewModels/NdmCrossSections/AnalysisVewModelLogic.cs
+++ b/StructureHelper/Windows/ViewModels/NdmCrossSections/AnalysisVewModelLogic.cs
@@ -1,11 +1,15 @@
 using StructureHelper.Infrastructure;
 using StructureHelper.Windows.CalculationWindows.CalculatorsViews.ForceCalculatorViews;
 using StructureHelper.Windows.ViewModels.Calculations.Calculators;
+using StructureHelper.Windows.ViewModels.Errors;
 using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Models.Calculators;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperLogics.Models.CrossSections;
 using StructureHelperLogics.NdmCalculations.Analyses;
 using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces.Logics;
+using StructureHelperLogics.NdmCalculations.Analyses.Logics;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -15,10 +19,11 @@ using System.Windows.Forms;
 
 namespace StructureHelper.Windows.ViewModels.NdmCrossSections
 {
-    public class AnalysisVewModelLogic : SelectedItemViewModel<INdmCalculator>
+    public class AnalysisVewModelLogic : SelectedItemViewModel<ICalculator>
     {
         private ICrossSectionRepository repository;
         private RelayCommand runCommand;
+        static readonly CalculatorUpdateStrategy calculatorUpdateStrategy = new();
 
         public override void AddMethod(object parameter)
         {
@@ -30,10 +35,19 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
             if (SelectedItem is ForceCalculator)
             {
                 var calculator = SelectedItem as ForceCalculator;
+                var calculatorCopy = (ICalculator)calculator.Clone();
                 var vm = new ForceCalculatorViewModel(repository.Primitives, repository.ForceActions, calculator);
 
                 var wnd = new ForceCalculatorView(vm);
                 wnd.ShowDialog();
+                if (wnd.DialogResult == true)
+                {
+                    // to do: update in repository
+                }
+                else
+                {
+                    calculatorUpdateStrategy.Update(calculator, calculatorCopy);
+                }
             }
             base.EditMethod(parameter);
         }
@@ -53,30 +67,28 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
                 (
                 runCommand = new RelayCommand(o =>
                 {
-                    try
-                    {
-                        SelectedItem.Run();
-                        var result = SelectedItem.Result;
-                        if (result.IsValid == false)
-                        {
-                            MessageBox.Show(result.Description, "Check data for analisys", MessageBoxButtons.OK, MessageBoxIcon.Warning);
-                        }
-                        else
-                        {
-                            var calculator = SelectedItem as IForceCalculator;
-                            var vm = new ForcesResultsViewModel(calculator);
-                            var wnd = new ForceResultsView(vm);
-                            wnd.ShowDialog();
-                        }
-                    }
-                    catch (Exception ex)
-                    {
-                        MessageBox.Show($"{ex}", "There are some errors during solution", MessageBoxButtons.OK, MessageBoxIcon.Error);
-                    }
-
+                    SafetyProcessor.RunSafeProcess(RunCalculator);
                 }, o => SelectedItem != null));
             }
         }
+
+        private void RunCalculator()
+        {
+            SelectedItem.Run();
+            var result = SelectedItem.Result;
+            if (result.IsValid == false)
+            {
+                MessageBox.Show(result.Description, "Check data for analisys", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+            }
+            else
+            {
+                var calculator = SelectedItem as IForceCalculator;
+                var vm = new ForcesResultsViewModel(calculator);
+                var wnd = new ForceResultsView(vm);
+                wnd.ShowDialog();
+            }
+        }
+
         public AnalysisVewModelLogic(ICrossSectionRepository sectionRepository) : base(sectionRepository.CalculatorsList)
         {
             repository = sectionRepository;
diff --git a/StructureHelper/Windows/ViewModels/NdmCrossSections/ICalculatorsViewModelLogic.cs b/StructureHelper/Windows/ViewModels/NdmCrossSections/ICalculatorsViewModelLogic.cs
index 773f53e..1677903 100644
--- a/StructureHelper/Windows/ViewModels/NdmCrossSections/ICalculatorsViewModelLogic.cs
+++ b/StructureHelper/Windows/ViewModels/NdmCrossSections/ICalculatorsViewModelLogic.cs
@@ -1,11 +1,12 @@
 using StructureHelper.Infrastructure;
+using StructureHelperCommon.Models.Calculators;
 using StructureHelperLogics.NdmCalculations.Analyses;
 using System.Collections.ObjectModel;
 using System.Windows.Input;
 
 namespace StructureHelper.Windows.ViewModels.NdmCrossSections
 {
-    public interface ICalculatorsViewModelLogic : ICRUDViewModel<INdmCalculator>
+    public interface ICalculatorsViewModelLogic : ICRUDViewModel<ICalculator>
     {
         RelayCommand Run { get; }
     }
diff --git a/StructureHelper/Windows/ViewModels/NdmCrossSections/PrimitiveViewModelLogic.cs b/StructureHelper/Windows/ViewModels/NdmCrossSections/PrimitiveViewModelLogic.cs
index bf1f3c2..0d42dd2 100644
--- a/StructureHelper/Windows/ViewModels/NdmCrossSections/PrimitiveViewModelLogic.cs
+++ b/StructureHelper/Windows/ViewModels/NdmCrossSections/PrimitiveViewModelLogic.cs
@@ -72,7 +72,7 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
             }
             else if (primitiveType == PrimitiveType.Reinforcement)
             {
-                var primitive = new ReinforcementPrimitive
+                var primitive = new RebarPrimitive
                 {
                     Area = 0.0005d
                 };
@@ -162,8 +162,21 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
 
         private void EditSelectedItem()
         {
+            var ndmPrimitive = SelectedItem.GetNdmPrimitive();
+            var primitiveCopy = ndmPrimitive.Clone() as INdmPrimitive;
             var wnd = new PrimitivePropertiesView(SelectedItem, repository);
             wnd.ShowDialog();
+            if (wnd.DialogResult == true)
+            {
+                // to do save into repository
+            }
+            else
+            {
+                var updateStrategy = new NdmPrimitiveUpdateStrategy();
+                updateStrategy.Update(ndmPrimitive, primitiveCopy);
+                SelectedItem.Refresh();
+            }
+
         }
 
         public ICommand Copy
@@ -183,15 +196,16 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
         {
             var oldPrimitive = SelectedItem.GetNdmPrimitive();
             var newPrimitive = oldPrimitive.Clone() as INdmPrimitive;
+            newPrimitive.Name += " copy";
             repository.Primitives.Add(newPrimitive);
             PrimitiveBase primitiveBase;
             if (newPrimitive is IRectanglePrimitive) { primitiveBase = new RectangleViewPrimitive(newPrimitive as IRectanglePrimitive); }
             else if (newPrimitive is ICirclePrimitive) { primitiveBase = new CircleViewPrimitive(newPrimitive as ICirclePrimitive); }
             else if (newPrimitive is IPointPrimitive)
             {
-                if (newPrimitive is ReinforcementPrimitive)
+                if (newPrimitive is RebarPrimitive)
                 {
-                    primitiveBase = new ReinforcementViewPrimitive(newPrimitive as ReinforcementPrimitive);
+                    primitiveBase = new ReinforcementViewPrimitive(newPrimitive as RebarPrimitive);
                 }
                 else
                 {
diff --git a/StructureHelper/Windows/ViewModels/PrimitiveProperties/PrimitivePropertiesViewModel.cs b/StructureHelper/Windows/ViewModels/PrimitiveProperties/PrimitivePropertiesViewModel.cs
index 133e353..d469aa4 100644
--- a/StructureHelper/Windows/ViewModels/PrimitiveProperties/PrimitivePropertiesViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/PrimitiveProperties/PrimitivePropertiesViewModel.cs
@@ -19,7 +19,7 @@ using RectangleViewPrimitive = StructureHelper.Infrastructure.UI.DataContexts.Re
 
 namespace StructureHelper.Windows.ViewModels.PrimitiveProperties
 {
-    public class PrimitivePropertiesViewModel : ViewModelBase, IDataErrorInfo
+    public class PrimitivePropertiesViewModel : OkCancelViewModelBase, IDataErrorInfo
     {
         private PrimitiveBase primitive;
         private ICrossSectionRepository sectionRepository;
@@ -316,11 +316,11 @@ namespace StructureHelper.Windows.ViewModels.PrimitiveProperties
         private void CheckHost(PrimitiveBase primitive, INdmPrimitive item)
         {
             var ndm = primitive.GetNdmPrimitive();
-            if (ndm is ReinforcementPrimitive)
+            if (ndm is RebarPrimitive)
             {
                 var host = item as IHasDivisionSize;
-                var reinforcement = ndm as ReinforcementPrimitive;
-                if (host.IsPointInside(new Point2D() { X = reinforcement.CenterX, Y = reinforcement.CenterY })
+                var reinforcement = ndm as RebarPrimitive;
+                if (host.IsPointInside(new Point2D() { X = reinforcement.Center.X, Y = reinforcement.Center.Y })
                     && reinforcement.HostPrimitive is null)
                 {
                     var dialogResult = MessageBox.Show($"Primitive {reinforcement.Name} is inside primitive {item.Name}",
diff --git a/StructureHelper/Windows/ViewModels/PrimitiveProperties/SelectPrimitivesViewModel.cs b/StructureHelper/Windows/ViewModels/PrimitiveProperties/SelectPrimitivesViewModel.cs
index 6d86ef6..5bec5db 100644
--- a/StructureHelper/Windows/ViewModels/PrimitiveProperties/SelectPrimitivesViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/PrimitiveProperties/SelectPrimitivesViewModel.cs
@@ -9,7 +9,7 @@ using System.Windows;
 
 namespace StructureHelper.Windows.ViewModels.PrimitiveProperties
 {
-    public class SelectPrimitivesViewModel
+    public class SelectPrimitivesViewModel : OkCancelViewModelBase
     {
         public SelectItemsViewModel<PrimitiveBase> Items { get; }
 
diff --git a/StructureHelperCommon/Infrastructures/Exceptions/ErrorString.cs b/StructureHelperCommon/Infrastructures/Exceptions/ErrorString.cs
index a1df238..c9d6d43 100644
--- a/StructureHelperCommon/Infrastructures/Exceptions/ErrorString.cs
+++ b/StructureHelperCommon/Infrastructures/Exceptions/ErrorString.cs
@@ -18,5 +18,6 @@
         public static string LongitudinalForceMustBeLessThanCriticalForce => "#0013: Absolute value of longitudinal force must be greater than critical force";
         public static string SizeMustBeGreaterThanZero => "#0014: Size must be greater than zero";
         public static string ParameterIsNull => "#0015: Parameter is null";
+        public static string ResultIsNotValid => "#0016: Result is not valid";
     }
 }
diff --git a/StructureHelperCommon/Models/Calculators/FindParameterCalculator.cs b/StructureHelperCommon/Models/Calculators/FindParameterCalculator.cs
new file mode 100644
index 0000000..b80f509
--- /dev/null
+++ b/StructureHelperCommon/Models/Calculators/FindParameterCalculator.cs
@@ -0,0 +1,81 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Calculators
+{
+    public class FindParameterCalculator : ICalculator
+    {
+        FindParameterResult result;
+        public string Name { get; set; }
+        public double StartValue { get; set; }
+        public double EndValue { get; set; }
+        public Predicate<double> Predicate { get; set; }
+        public IAccuracy Accuracy {get;set;}
+        public IResult Result => result;
+
+        public FindParameterCalculator()
+        {
+            StartValue = 0d;
+            EndValue = 1d;
+            Accuracy = new Accuracy() { IterationAccuracy = 0.001, MaxIterationCount = 1000 };
+        }
+        public void Run()
+        {
+            result = new() { IsValid = true};
+            try
+            {
+                result.Parameter = FindMinimumValue(StartValue, EndValue, Predicate);
+                result.Description = "Parameter was found succefully";
+            }
+            catch(Exception ex)
+            {
+                result.IsValid = false;
+                result.Description += ex;
+            }
+        }
+        public object Clone()
+        {
+            throw new NotImplementedException();
+        }
+
+        private double FindMinimumValue(double start, double end, Predicate<double> predicate)
+        {
+            if (predicate(end) == false)
+            {
+                throw new StructureHelperException(ErrorStrings.DataIsInCorrect + ": pridicate for end value must be true");
+
+            }
+            double precision = Accuracy.IterationAccuracy;
+            int maxIterationCount = Accuracy.MaxIterationCount;
+            double current = start;
+            double step = (end - start) / 2;
+            int iterationNum = 0;
+            while (step > precision)
+            {
+                if (predicate(current))
+                {
+                    end = current;
+                }
+                else
+                {
+                    start = current;
+                }
+
+                current = (start + end) / 2;
+                step = (end - start) / 2;
+                iterationNum++;
+                if (iterationNum > maxIterationCount)
+                {
+                    throw new StructureHelperException(ErrorStrings.DataIsInCorrect + ": violation of iteration count");
+                }
+            }
+
+            return current;
+        }
+    }
+}
diff --git a/StructureHelperCommon/Models/Calculators/FindParameterResult.cs b/StructureHelperCommon/Models/Calculators/FindParameterResult.cs
new file mode 100644
index 0000000..0e0fab8
--- /dev/null
+++ b/StructureHelperCommon/Models/Calculators/FindParameterResult.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Calculators
+{
+    public class FindParameterResult : IResult
+    {
+        public bool IsValid { get; set; }
+        public string Description { get; set; }
+        public double Parameter { get; set; }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/INdmCalculator.cs b/StructureHelperCommon/Models/Calculators/ICalculator.cs
similarity index 64%
rename from StructureHelperLogics/NdmCalculations/Analyses/INdmCalculator.cs
rename to StructureHelperCommon/Models/Calculators/ICalculator.cs
index dc431ab..11bfcf6 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/INdmCalculator.cs
+++ b/StructureHelperCommon/Models/Calculators/ICalculator.cs
@@ -1,5 +1,4 @@
-using StructureHelperCommon.Models.Calculators;
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -7,9 +6,9 @@ using System.Threading;
 using System.Threading.Tasks;
 using TaskManager;
 
-namespace StructureHelperLogics.NdmCalculations.Analyses
+namespace StructureHelperCommon.Models.Calculators
 {
-    public interface INdmCalculator : ICloneable
+    public interface ICalculator : ICloneable
     {
         string Name { get; set; }
         /// <summary>
@@ -19,6 +18,6 @@ namespace StructureHelperLogics.NdmCalculations.Analyses
         /// <summary>
         /// Result of Calculations
         /// </summary>
-        INdmResult Result { get; }
+        IResult Result { get; }
     }
 }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/INdmResult.cs b/StructureHelperCommon/Models/Calculators/IResult.cs
similarity index 77%
rename from StructureHelperLogics/NdmCalculations/Analyses/INdmResult.cs
rename to StructureHelperCommon/Models/Calculators/IResult.cs
index 137a624..2f81734 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/INdmResult.cs
+++ b/StructureHelperCommon/Models/Calculators/IResult.cs
@@ -4,9 +4,9 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace StructureHelperLogics.NdmCalculations.Analyses
+namespace StructureHelperCommon.Models.Calculators
 {
-    public interface INdmResult
+    public interface IResult
     {
         /// <summary>
         /// True if result of calculation is valid
diff --git a/StructureHelperCommon/Models/Calculators/Logics/AccuracyUpdateStrategy.cs b/StructureHelperCommon/Models/Calculators/Logics/AccuracyUpdateStrategy.cs
new file mode 100644
index 0000000..27004b4
--- /dev/null
+++ b/StructureHelperCommon/Models/Calculators/Logics/AccuracyUpdateStrategy.cs
@@ -0,0 +1,18 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Calculators
+{
+    public class AccuracyUpdateStrategy : IUpdateStrategy<IAccuracy>
+    {
+        public void Update(IAccuracy targetObject, IAccuracy sourceObject)
+        {
+            targetObject.IterationAccuracy = sourceObject.IterationAccuracy;
+            targetObject.MaxIterationCount = sourceObject.MaxIterationCount;
+        }
+    }
+}
diff --git a/StructureHelperCommon/Models/Forces/Logics/ForceActionUpdateStrategy.cs b/StructureHelperCommon/Models/Forces/Logics/ForceActionUpdateStrategy.cs
index d18b74d..d8b7393 100644
--- a/StructureHelperCommon/Models/Forces/Logics/ForceActionUpdateStrategy.cs
+++ b/StructureHelperCommon/Models/Forces/Logics/ForceActionUpdateStrategy.cs
@@ -13,7 +13,7 @@ namespace StructureHelperCommon.Models.Forces
 {
     public class ForceActionUpdateStrategy : IUpdateStrategy<IForceAction>
     {
-        private readonly IUpdateStrategy<IPoint2D> pointStrategy = new PointUpdateStrategy();
+        private readonly IUpdateStrategy<IPoint2D> pointStrategy = new PointShapeUpdateStrategy();
         private readonly IUpdateStrategy<IDesignForcePair> forcePairUpdateStrategy = new ForcePairUpdateStrategy();
         private readonly IUpdateStrategy<IForceCombinationByFactor> factorUpdateStrategy = new FactorCombinationUpdateStrategy();
         private readonly IUpdateStrategy<IForceCombinationList> forceListUpdateStrategy = new ForceCombinationListUpdateStrategy();
diff --git a/StructureHelperCommon/Models/Forces/Logics/ForceTupleUpdateStrategy.cs b/StructureHelperCommon/Models/Forces/Logics/ForceTupleUpdateStrategy.cs
index a4eecaf..2fb68e3 100644
--- a/StructureHelperCommon/Models/Forces/Logics/ForceTupleUpdateStrategy.cs
+++ b/StructureHelperCommon/Models/Forces/Logics/ForceTupleUpdateStrategy.cs
@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 
 namespace StructureHelperCommon.Models.Forces
 {
-    internal class ForceTupleUpdateStrategy : IUpdateStrategy<IForceTuple>
+    public class ForceTupleUpdateStrategy : IUpdateStrategy<IForceTuple>
     {
         public void Update(IForceTuple targetObject, IForceTuple sourceObject)
         {
diff --git a/StructureHelperCommon/Models/Sections/CompressedMember.cs b/StructureHelperCommon/Models/Sections/CompressedMember.cs
index 9aaf418..09a1311 100644
--- a/StructureHelperCommon/Models/Sections/CompressedMember.cs
+++ b/StructureHelperCommon/Models/Sections/CompressedMember.cs
@@ -1,9 +1,8 @@
-using StructureHelperCommon.Services.Sections;
-
-namespace StructureHelperCommon.Models.Sections
+namespace StructureHelperCommon.Models.Sections
 {
     public class CompressedMember : ICompressedMember
     {
+        static readonly CompressedMemberUpdateStrategy updateStrategy = new();
         public bool Buckling { get; set; }
         public double GeometryLength { get; set; }
         public double LengthFactorX { get; set; }
@@ -24,9 +23,9 @@ namespace StructureHelperCommon.Models.Sections
 
         public object Clone()
         {
-            var target = new CompressedMember();
-            CompressedMemberServices.CopyProperties(this, target);
-            return target;
+            var newItem = new CompressedMember();
+            updateStrategy.Update(newItem, this);
+            return newItem;
         }
     }
 }
diff --git a/StructureHelperCommon/Models/Sections/Logics/CompressedMemberUpdateStrategy.cs b/StructureHelperCommon/Models/Sections/Logics/CompressedMemberUpdateStrategy.cs
new file mode 100644
index 0000000..32e6d81
--- /dev/null
+++ b/StructureHelperCommon/Models/Sections/Logics/CompressedMemberUpdateStrategy.cs
@@ -0,0 +1,22 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Sections
+{
+    public class CompressedMemberUpdateStrategy : IUpdateStrategy<ICompressedMember>
+    {
+        public void Update(ICompressedMember targetObject, ICompressedMember sourceObject)
+        {
+            targetObject.Buckling = sourceObject.Buckling;
+            targetObject.GeometryLength = sourceObject.GeometryLength;
+            targetObject.LengthFactorX = sourceObject.LengthFactorX;
+            targetObject.DiagramFactorX = sourceObject.DiagramFactorX;
+            targetObject.LengthFactorY = sourceObject.LengthFactorY;
+            targetObject.DiagramFactorY = sourceObject.DiagramFactorY;
+        }
+    }
+}
diff --git a/StructureHelperCommon/Models/Shapes/Logics/CircleShapeUpdateStrategy.cs b/StructureHelperCommon/Models/Shapes/Logics/CircleShapeUpdateStrategy.cs
new file mode 100644
index 0000000..ad0033c
--- /dev/null
+++ b/StructureHelperCommon/Models/Shapes/Logics/CircleShapeUpdateStrategy.cs
@@ -0,0 +1,17 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Shapes
+{
+    public class CircleShapeUpdateStrategy : IUpdateStrategy<ICircleShape>
+    {
+        public void Update(ICircleShape targetObject, ICircleShape sourceObject)
+        {
+            targetObject.Diameter = sourceObject.Diameter;
+        }
+    }
+}
diff --git a/StructureHelperCommon/Models/Shapes/Logics/LineShapeUpdateStrategy.cs b/StructureHelperCommon/Models/Shapes/Logics/LineShapeUpdateStrategy.cs
new file mode 100644
index 0000000..964062f
--- /dev/null
+++ b/StructureHelperCommon/Models/Shapes/Logics/LineShapeUpdateStrategy.cs
@@ -0,0 +1,20 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Shapes.Logics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Shapes
+{
+    public class LineShapeUpdateStrategy : IUpdateStrategy<ILineShape>
+    {
+        readonly PointShapeUpdateStrategy pointUpdateStrategy = new();
+        public void Update(ILineShape targetObject, ILineShape sourceObject)
+        {
+            pointUpdateStrategy.Update(targetObject.StartPoint, sourceObject.StartPoint);
+            pointUpdateStrategy.Update(targetObject.EndPoint, sourceObject.EndPoint);
+        }
+    }
+}
diff --git a/StructureHelperCommon/Models/Shapes/Logics/PointUpdateStrategy.cs b/StructureHelperCommon/Models/Shapes/Logics/PointShapeUpdateStrategy.cs
similarity index 87%
rename from StructureHelperCommon/Models/Shapes/Logics/PointUpdateStrategy.cs
rename to StructureHelperCommon/Models/Shapes/Logics/PointShapeUpdateStrategy.cs
index 0ff99ec..ede9960 100644
--- a/StructureHelperCommon/Models/Shapes/Logics/PointUpdateStrategy.cs
+++ b/StructureHelperCommon/Models/Shapes/Logics/PointShapeUpdateStrategy.cs
@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 namespace StructureHelperCommon.Models.Shapes.Logics
 {
     /// <inheritdoc />
-    public class PointUpdateStrategy : IUpdateStrategy<IPoint2D>
+    public class PointShapeUpdateStrategy : IUpdateStrategy<IPoint2D>
     {
         /// <inheritdoc />
         public void Update(IPoint2D targetObject, IPoint2D sourceObject)
diff --git a/StructureHelperCommon/Models/Shapes/Logics/RectangleShapeUpdateStrategy.cs b/StructureHelperCommon/Models/Shapes/Logics/RectangleShapeUpdateStrategy.cs
new file mode 100644
index 0000000..d2e8fad
--- /dev/null
+++ b/StructureHelperCommon/Models/Shapes/Logics/RectangleShapeUpdateStrategy.cs
@@ -0,0 +1,19 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Shapes
+{
+    public class RectangleShapeUpdateStrategy : IUpdateStrategy<IRectangleShape>
+    {
+        public void Update(IRectangleShape targetObject, IRectangleShape sourceObject)
+        {
+            targetObject.Width = sourceObject.Width;
+            targetObject.Height = sourceObject.Height;
+            targetObject.Angle = sourceObject.Angle;
+        }
+    }
+}
diff --git a/StructureHelperCommon/Models/Shapes/Point2D.cs b/StructureHelperCommon/Models/Shapes/Point2D.cs
index ea1963c..3948b97 100644
--- a/StructureHelperCommon/Models/Shapes/Point2D.cs
+++ b/StructureHelperCommon/Models/Shapes/Point2D.cs
@@ -7,7 +7,7 @@ namespace StructureHelperCommon.Models.Shapes
     /// <inheritdoc />
     public class Point2D : IPoint2D
     {
-        private readonly IUpdateStrategy<IPoint2D> updateStrategy = new PointUpdateStrategy();
+        private readonly IUpdateStrategy<IPoint2D> updateStrategy = new PointShapeUpdateStrategy();
         /// <inheritdoc />
         public Guid Id { get; }
         /// <inheritdoc />
diff --git a/StructureHelperCommon/Services/Calculations/AccuracyService.cs b/StructureHelperCommon/Services/Calculations/AccuracyService.cs
deleted file mode 100644
index 521fbb4..0000000
--- a/StructureHelperCommon/Services/Calculations/AccuracyService.cs
+++ /dev/null
@@ -1,13 +0,0 @@
-using StructureHelperCommon.Models.Calculators;
-
-namespace StructureHelperCommon.Services.Calculations
-{
-    public static class AccuracyService
-    {
-        public static void CopyProperties(IAccuracy source, IAccuracy target)
-        {
-            target.IterationAccuracy = source.IterationAccuracy;
-            target.MaxIterationCount = source.MaxIterationCount;
-        }
-    }
-}
diff --git a/StructureHelperCommon/Services/Sections/CompressedMemberServices.cs b/StructureHelperCommon/Services/Sections/CompressedMemberServices.cs
deleted file mode 100644
index 0999535..0000000
--- a/StructureHelperCommon/Services/Sections/CompressedMemberServices.cs
+++ /dev/null
@@ -1,17 +0,0 @@
-using StructureHelperCommon.Models.Sections;
-
-namespace StructureHelperCommon.Services.Sections
-{
-    public static class CompressedMemberServices
-    {
-        public static void CopyProperties(ICompressedMember source, ICompressedMember target)
-        {
-            target.Buckling = source.Buckling;
-            target.GeometryLength = source.GeometryLength;
-            target.LengthFactorX = source.LengthFactorX;
-            target.DiagramFactorX = source.DiagramFactorX;
-            target.LengthFactorY = source.LengthFactorY;
-            target.DiagramFactorY = source.DiagramFactorY;
-        }
-    }
-}
diff --git a/StructureHelperCommon/Services/ShapeServices/ShapeService.cs b/StructureHelperCommon/Services/ShapeServices/ShapeService.cs
deleted file mode 100644
index ba5d8dc..0000000
--- a/StructureHelperCommon/Services/ShapeServices/ShapeService.cs
+++ /dev/null
@@ -1,27 +0,0 @@
-using StructureHelperCommon.Models.Shapes;
-
-namespace StructureHelperCommon.Services.ShapeServices
-{
-    public static class ShapeService
-    {
-        public static void CopyLineProperties(ILineShape source, ILineShape target)
-        {
-            target.StartPoint.X = source.StartPoint.X;
-            target.StartPoint.Y = source.StartPoint.Y;
-            target.EndPoint.X = source.EndPoint.X;
-            target.EndPoint.Y = source.EndPoint.Y;
-        }
-
-        public static void CopyRectangleProperties(IRectangleShape source, IRectangleShape target)
-        {
-            target.Width = source.Width;
-            target.Height = source.Height;
-            target.Angle = source.Angle;
-        }
-
-        public static void CopyCircleProperties(ICircleShape source, ICircleShape target)
-        {
-            target.Diameter = source.Diameter;
-        }
-    }
-}
diff --git a/StructureHelperLogics/MaterialBuilders/Decorators/IDecoratorOption.cs b/StructureHelperLogics/MaterialBuilders/Decorators/IDecoratorOption.cs
new file mode 100644
index 0000000..a6c66f7
--- /dev/null
+++ b/StructureHelperLogics/MaterialBuilders/Decorators/IDecoratorOption.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders
+{
+    internal interface IDecoratorOption : IMaterialOption
+    {
+    }
+}
diff --git a/StructureHelperLogics/MaterialBuilders/Decorators/RestrictStrainDecorator.cs b/StructureHelperLogics/MaterialBuilders/Decorators/RestrictStrainDecorator.cs
new file mode 100644
index 0000000..b225503
--- /dev/null
+++ b/StructureHelperLogics/MaterialBuilders/Decorators/RestrictStrainDecorator.cs
@@ -0,0 +1,57 @@
+using LoaderCalculator.Data.Materials;
+using StructureHelperCommon.Services;
+using StructureHelperLogics.MaterialBuilders.Decorators;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders
+{
+    internal class RestrictStrainDecorator : IMaterialBuilder
+    {
+        IMaterialBuilder builder;
+        public IMaterialOption MaterialOption { get; set; }
+
+        public RestrictStrainDecorator(IMaterialBuilder builder)
+        {
+            this.builder = builder;
+        }
+
+        public IMaterial GetMaterial()
+        {
+            CheckOptions();
+            var option = (RestrictStrainOption)MaterialOption;
+            var material = new Material();
+            material.InitModulus = builder.GetMaterial().InitModulus;
+            material.DiagramParameters = new List<double>()
+            {
+                option.MaxTensileStrain,
+                option.MaxCompessionStrain
+            };
+            material.Diagram = GetStressDiagram;
+            return material;
+        }
+
+        private void CheckOptions()
+        {
+            CheckObject.CompareTypes(typeof(RestrictStrainOption), MaterialOption.GetType());
+        }
+
+        private double GetStressDiagram(IEnumerable<double> parameters, double strain)
+        {
+            var maxTensileStrain = parameters.ToList()[0];
+            var maxCompressionStrain = parameters.ToList()[1];
+            if (strain > maxTensileStrain || strain < maxCompressionStrain)
+            {
+                return 0d;
+            }
+            else
+            {
+                var material = builder.GetMaterial();
+                return material.Diagram.Invoke(parameters, strain);
+            }
+        }
+    }
+}
diff --git a/StructureHelperLogics/MaterialBuilders/Decorators/RestrictStrainOption.cs b/StructureHelperLogics/MaterialBuilders/Decorators/RestrictStrainOption.cs
new file mode 100644
index 0000000..eb77c14
--- /dev/null
+++ b/StructureHelperLogics/MaterialBuilders/Decorators/RestrictStrainOption.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders.Decorators
+{
+    internal class RestrictStrainOption : IDecoratorOption
+    {
+        private double maxTensileStrain;
+        private double maxCompessionStrain;
+
+        public double MaxTensileStrain
+        {
+            get => maxTensileStrain;
+            set
+            {
+                if (value < 0d)
+                {
+                    //to do exception
+                }
+                maxTensileStrain = value;
+            }
+        }
+        public double MaxCompessionStrain { get => maxCompessionStrain; set => maxCompessionStrain = value; }
+    }
+}
diff --git a/StructureHelperLogics/MaterialBuilders/IBearingOption.cs b/StructureHelperLogics/MaterialBuilders/IBearingOption.cs
new file mode 100644
index 0000000..f56afd0
--- /dev/null
+++ b/StructureHelperLogics/MaterialBuilders/IBearingOption.cs
@@ -0,0 +1,19 @@
+using LoaderCalculator.Data.Materials.MaterialBuilders;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders
+{
+    internal interface IBearingOption : IMaterialOption
+    {
+        double InitModulus { get; set; }
+        double Strength { get; set; }
+        LimitStates LimitState { get; set; }
+        bool IsShortTerm { get; set; }
+        CodesType CodesType { get; set; }
+        IPartialFactor ExternalFactor { get; }
+    }
+}
diff --git a/StructureHelperLogics/MaterialBuilders/IMaterialBuilder.cs b/StructureHelperLogics/MaterialBuilders/IMaterialBuilder.cs
new file mode 100644
index 0000000..1717dac
--- /dev/null
+++ b/StructureHelperLogics/MaterialBuilders/IMaterialBuilder.cs
@@ -0,0 +1,15 @@
+using LoaderCalculator.Data.Materials;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders
+{
+    internal interface IMaterialBuilder
+    {
+        IMaterialOption MaterialOption { get; set; }
+        IMaterial GetMaterial();
+    }
+}
diff --git a/StructureHelperLogics/MaterialBuilders/IMaterialOption.cs b/StructureHelperLogics/MaterialBuilders/IMaterialOption.cs
new file mode 100644
index 0000000..9d75e81
--- /dev/null
+++ b/StructureHelperLogics/MaterialBuilders/IMaterialOption.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders
+{
+    internal interface IMaterialOption
+    {
+    }
+}
diff --git a/StructureHelperLogics/MaterialBuilders/IPartialFactor.cs b/StructureHelperLogics/MaterialBuilders/IPartialFactor.cs
new file mode 100644
index 0000000..23ca528
--- /dev/null
+++ b/StructureHelperLogics/MaterialBuilders/IPartialFactor.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders
+{
+    internal interface IPartialFactor
+    {
+        double YoungsModulus { get; set; }
+        double Compressive { get; set; }
+        double Tensile { get; set; }
+    }
+}
diff --git a/StructureHelperLogics/Models/CrossSections/CrossSectionRepository.cs b/StructureHelperLogics/Models/CrossSections/CrossSectionRepository.cs
index e094a63..0197496 100644
--- a/StructureHelperLogics/Models/CrossSections/CrossSectionRepository.cs
+++ b/StructureHelperLogics/Models/CrossSections/CrossSectionRepository.cs
@@ -1,4 +1,5 @@
 using StructureHelper.Models.Materials;
+using StructureHelperCommon.Models.Calculators;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperLogics.Models.Primitives;
 using StructureHelperLogics.NdmCalculations.Analyses;
@@ -16,14 +17,14 @@ namespace StructureHelperLogics.Models.CrossSections
         public List<IForceAction> ForceActions { get; private set; }
         public List<IHeadMaterial> HeadMaterials { get; private set; }
         public List<INdmPrimitive> Primitives { get; }
-        public List<INdmCalculator> CalculatorsList { get; private set; }
+        public List<ICalculator> CalculatorsList { get; private set; }
 
         public CrossSectionRepository()
         {
             ForceActions = new List<IForceAction>();
             HeadMaterials = new List<IHeadMaterial>();
             Primitives = new List<INdmPrimitive>();
-            CalculatorsList = new List<INdmCalculator>();
+            CalculatorsList = new List<ICalculator>();
         }
     }
 }
diff --git a/StructureHelperLogics/Models/CrossSections/ICrossSectionRepository.cs b/StructureHelperLogics/Models/CrossSections/ICrossSectionRepository.cs
index b6059ed..67db19d 100644
--- a/StructureHelperLogics/Models/CrossSections/ICrossSectionRepository.cs
+++ b/StructureHelperLogics/Models/CrossSections/ICrossSectionRepository.cs
@@ -1,4 +1,5 @@
 using StructureHelper.Models.Materials;
+using StructureHelperCommon.Models.Calculators;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperLogics.Models.Materials;
 using StructureHelperLogics.Models.Primitives;
@@ -15,6 +16,6 @@ namespace StructureHelperLogics.Models.CrossSections
     public interface ICrossSectionRepository : IHasHeadMaterials, IHasPrimitives
     {
         List<IForceAction> ForceActions { get; }
-        List<INdmCalculator> CalculatorsList { get; }
+        List<ICalculator> CalculatorsList { get; }
     }
 }
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/CalculatorLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/CalculatorLogic.cs
index 9a2ad9f..3884f82 100644
--- a/StructureHelperLogics/Models/Templates/CrossSections/CalculatorLogic.cs
+++ b/StructureHelperLogics/Models/Templates/CrossSections/CalculatorLogic.cs
@@ -1,4 +1,5 @@
-using StructureHelperLogics.NdmCalculations.Analyses;
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperLogics.NdmCalculations.Analyses;
 using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
 using System;
 using System.Collections.Generic;
@@ -10,9 +11,9 @@ namespace StructureHelperLogics.Models.Templates.CrossSections
 {
     internal class CalculatorLogic : ICalculatorLogic
     {
-        public IEnumerable<INdmCalculator> GetNdmCalculators()
+        public IEnumerable<ICalculator> GetNdmCalculators()
         {
-            var calculators = new List<INdmCalculator>();
+            var calculators = new List<ICalculator>();
             calculators.Add(new ForceCalculator() { Name = "New Force Calculator"});
             return calculators;
         }
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/ICalculatorLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/ICalculatorLogic.cs
index dc4453a..9eba3d5 100644
--- a/StructureHelperLogics/Models/Templates/CrossSections/ICalculatorLogic.cs
+++ b/StructureHelperLogics/Models/Templates/CrossSections/ICalculatorLogic.cs
@@ -1,14 +1,9 @@
-using StructureHelperLogics.NdmCalculations.Analyses;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using StructureHelperCommon.Models.Calculators;
 
 namespace StructureHelperLogics.Models.Templates.CrossSections
 {
     internal interface ICalculatorLogic
     {
-        IEnumerable<INdmCalculator> GetNdmCalculators();
+        IEnumerable<ICalculator> GetNdmCalculators();
     }
 }
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/RCs/CircleGeometryLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/RCs/CircleGeometryLogic.cs
index 3007c2d..b9afa97 100644
--- a/StructureHelperLogics/Models/Templates/CrossSections/RCs/CircleGeometryLogic.cs
+++ b/StructureHelperLogics/Models/Templates/CrossSections/RCs/CircleGeometryLogic.cs
@@ -52,13 +52,14 @@ namespace StructureHelperLogics.Models.Templates.CrossSections.RCs
                 var angle = i * dAngle;
                 var x = radius * Math.Sin(angle);
                 var y = radius * Math.Cos(angle);
-                var point = new ReinforcementPrimitive()
-                { CenterX = x,
-                    CenterY = y,
+                var point = new RebarPrimitive()
+                { 
                     Area = barArea,
                     Name = "Left bottom point",
                     HeadMaterial = reinforcementMaterial,
                     HostPrimitive=concreteBlock };
+                point.Center.X = x;
+                point.Center.Y = y;
                 primitives.Add(point);
             }
             return primitives;
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/RCs/RectGeometryLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/RCs/RectGeometryLogic.cs
index b047ef3..93f7330 100644
--- a/StructureHelperLogics/Models/Templates/CrossSections/RCs/RectGeometryLogic.cs
+++ b/StructureHelperLogics/Models/Templates/CrossSections/RCs/RectGeometryLogic.cs
@@ -59,13 +59,45 @@ namespace StructureHelperLogics.Models.Templates.CrossSections.RCs
             double[] ys = new double[] { -height / 2 + gap, height / 2 - gap };
 
             List<INdmPrimitive> primitives = new List<INdmPrimitive>();
-            var point = new ReinforcementPrimitive() { CenterX = xs[0], CenterY = ys[0], Area = area1, Name = "Left bottom point", HeadMaterial = reinforcement, HostPrimitive=concreteBlock };
+            var point = new RebarPrimitive()
+            {
+                Area = area1,
+                Name = "Left bottom point",
+                HeadMaterial = reinforcement,
+                HostPrimitive=concreteBlock
+            };
+            point.Center.X = xs[0];
+            point.Center.Y = ys[0];
             primitives.Add(point);
-            point = new ReinforcementPrimitive() { CenterX = xs[1], CenterY = ys[0], Area = area1, Name = "Right bottom point", HeadMaterial = reinforcement, HostPrimitive = concreteBlock };
+            point = new RebarPrimitive()
+            {   
+                Area = area1,
+                Name = "Right bottom point",
+                HeadMaterial = reinforcement,
+                HostPrimitive = concreteBlock
+            };
+            point.Center.X = xs[1];
+            point.Center.Y = ys[0];
             primitives.Add(point);
-            point = new ReinforcementPrimitive() { CenterX = xs[0], CenterY = ys[1], Area = area2, Name = "Left top point", HeadMaterial = reinforcement, HostPrimitive = concreteBlock };
+            point = new RebarPrimitive()
+            {
+                Area = area2,
+                Name = "Left top point",
+                HeadMaterial = reinforcement,
+                HostPrimitive = concreteBlock
+            };
+            point.Center.X = xs[0];
+            point.Center.Y = ys[1];
             primitives.Add(point);
-            point = new ReinforcementPrimitive() { CenterX = xs[1], CenterY = ys[1], Area = area2, Name = "Right top point", HeadMaterial = reinforcement, HostPrimitive = concreteBlock };
+            point = new RebarPrimitive()
+            {
+                Area = area2,
+                Name = "Right top point",
+                HeadMaterial = reinforcement,
+                HostPrimitive = concreteBlock
+            };
+            point.Center.X = xs[1];
+            point.Center.Y = ys[1];
             primitives.Add(point);
             return primitives;
         }
@@ -83,10 +115,14 @@ namespace StructureHelperLogics.Models.Templates.CrossSections.RCs
                 double dist = (xs[1] - xs[0]) / count;
                 for (int i = 1; i < count; i++)
                 {
-                    point = new ReinforcementPrimitive() { CenterX = xs[0] + dist * i, CenterY = ys[0], Area = area1, Name = $"Bottom point {i}", HeadMaterial = reinforcement, HostPrimitive = concreteBlock };
-                    primitives.Add(point);
-                    point = new ReinforcementPrimitive() { CenterX = xs[0] + dist * i, CenterY = ys[1], Area = area2, Name = $"Top point {i}", HeadMaterial = reinforcement, HostPrimitive = concreteBlock };
+                    point = new RebarPrimitive() { Area = area1, Name = $"Bottom point {i}", HeadMaterial = reinforcement, HostPrimitive = concreteBlock };
+                    point.Center.X = xs[0] + dist * i;
+                    point.Center.Y = ys[0];
                     primitives.Add(point);
+                    point = new RebarPrimitive() {Area = area2, Name = $"Top point {i}", HeadMaterial = reinforcement, HostPrimitive = concreteBlock };
+                    point.Center.X = xs[0] + dist * i;
+                    point.Center.Y = ys[1];
+                   primitives.Add(point);
                 }
             }
             if (template.HeightCount > 2)
@@ -95,9 +131,25 @@ namespace StructureHelperLogics.Models.Templates.CrossSections.RCs
                 double dist = (ys[1] - ys[0]) / count;
                 for (int i = 1; i < count; i++)
                 {
-                    point = new ReinforcementPrimitive() { CenterX = xs[0], CenterY = ys[0] + dist * i, Area = area1, Name = $"Left point {i}", HeadMaterial = reinforcement, HostPrimitive = concreteBlock };
+                    point = new RebarPrimitive()
+                    {
+                        Area = area1,
+                        Name = $"Left point {i}",
+                        HeadMaterial = reinforcement,
+                        HostPrimitive = concreteBlock
+                    };
+                    point.Center.X = xs[0];
+                    point.Center.Y = ys[0] + dist * i;
                     primitives.Add(point);
-                    point = new ReinforcementPrimitive() { CenterX = xs[1], CenterY = ys[0] + dist * i, Area = area1, Name = $"Right point {i}", HeadMaterial = reinforcement, HostPrimitive = concreteBlock };
+                    point = new RebarPrimitive()
+                    {
+                        Area = area1,
+                        Name = $"Right point {i}",
+                        HeadMaterial = reinforcement,
+                        HostPrimitive = concreteBlock
+                    };
+                    point.Center.X = xs[1];
+                    point.Center.Y = ys[0] + dist * i;
                     primitives.Add(point);
                 }
             }
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/RCs/SectionTemplate.cs b/StructureHelperLogics/Models/Templates/CrossSections/RCs/SectionTemplate.cs
index 51c67fd..dedcb13 100644
--- a/StructureHelperLogics/Models/Templates/CrossSections/RCs/SectionTemplate.cs
+++ b/StructureHelperLogics/Models/Templates/CrossSections/RCs/SectionTemplate.cs
@@ -1,4 +1,5 @@
 using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Calculators;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperLogics.Models.CrossSections;
 using StructureHelperLogics.Models.Templates.RCs;
@@ -20,7 +21,7 @@ namespace StructureHelperLogics.Models.Templates.CrossSections.RCs
         ICalculatorLogic calculatorLogic;
         IEnumerable<INdmPrimitive> primitives;
         IEnumerable<IForceAction> combinations;
-        IEnumerable<INdmCalculator> calculators;
+        IEnumerable<ICalculator> calculators;
 
         public SectionTemplate(IRCGeometryLogic geometryLogic)
         {
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
index c51e964..9d977c0 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
@@ -1,33 +1,26 @@
-using LoaderCalculator;
-using LoaderCalculator.Data.Matrix;
-using LoaderCalculator.Data.Ndms;
-using LoaderCalculator.Data.SourceData;
+using LoaderCalculator.Data.Ndms;
 using StructureHelperCommon.Infrastructures.Enums;
 using StructureHelperCommon.Models.Calculators;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperCommon.Models.Sections;
 using StructureHelperCommon.Models.Shapes;
-using StructureHelperCommon.Services.Calculations;
 using StructureHelperCommon.Services.Forces;
-using StructureHelperCommon.Services.Sections;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces.Logics;
 using StructureHelperLogics.NdmCalculations.Buckling;
 using StructureHelperLogics.NdmCalculations.Primitives;
 using StructureHelperLogics.Services.NdmPrimitives;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 {
     public class ForceCalculator : IForceCalculator
     {
+        static readonly ForceCalculatorUpdateStrategy updateStrategy = new();
         public string Name { get; set; }
         public List<LimitStates> LimitStatesList { get; }
         public List<CalcTerms> CalcTermsList { get; }
         public List<IForceAction> ForceActions { get; }
         public List<INdmPrimitive> Primitives { get; }
-        public INdmResult Result { get; private set; }
+        public IResult Result { get; private set; }
         public ICompressedMember CompressedMember { get; }
         public IAccuracy Accuracy { get; set; }
         public List<IForceCombinationList> ForceCombinationLists { get; private set; }
@@ -184,16 +177,9 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 
         public object Clone()
         {
-            IForceCalculator target = new ForceCalculator { Name = Name + " copy"};
-            target.LimitStatesList.Clear();
-            target.LimitStatesList.AddRange(LimitStatesList);
-            target.CalcTermsList.Clear();
-            target.CalcTermsList.AddRange(CalcTermsList);
-            AccuracyService.CopyProperties(Accuracy, target.Accuracy);
-            CompressedMemberServices.CopyProperties(CompressedMember, target.CompressedMember);
-            target.Primitives.AddRange(Primitives);
-            target.ForceActions.AddRange(ForceActions);
-            return target;
+            var newCalculator = new ForceCalculator();
+            updateStrategy.Update(newCalculator, this);
+            return newCalculator;
         }
     }
 }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceTupleCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceTupleCalculator.cs
index 68a2a0a..da9a352 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceTupleCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceTupleCalculator.cs
@@ -15,7 +15,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
     public class ForceTupleCalculator : IForceTupleCalculator
     {
         public string Name { get; set; }
-        public INdmResult Result { get; private set; }
+        public IResult Result { get; private set; }
 
         private IForceTupleInputData inputData;
 
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs
index a6938cc..7061f24 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs
@@ -4,12 +4,10 @@ using StructureHelperCommon.Models.Calculators;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperCommon.Models.Sections;
 using StructureHelperLogics.NdmCalculations.Primitives;
-using System;
-using System.Collections.Generic;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 {
-    public interface IForceCalculator : INdmCalculator, IHasPrimitives, IHasForceCombinations
+    public interface IForceCalculator : ICalculator, IHasPrimitives, IHasForceCombinations
     {
         List<CalcTerms> CalcTermsList { get; }
         List<LimitStates> LimitStatesList { get; }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceTupleCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceTupleCalculator.cs
index 07a411a..57e6910 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceTupleCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceTupleCalculator.cs
@@ -7,7 +7,7 @@ using System.Threading.Tasks;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 {
-    public interface IForceTupleCalculator : INdmCalculator
+    public interface IForceTupleCalculator : ICalculator
     {
     }
 }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesResults.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesResults.cs
index 77548d6..895f687 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesResults.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesResults.cs
@@ -1,8 +1,9 @@
-using System.Collections.Generic;
+using StructureHelperCommon.Models.Calculators;
+using System.Collections.Generic;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 {
-    public interface IForcesResults : INdmResult
+    public interface IForcesResults : IResult
     {
         string Description { get; set; }
         List<IForcesTupleResult> ForcesResultList { get; }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesTupleResult.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesTupleResult.cs
index 4a108fc..ecac0e1 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesTupleResult.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesTupleResult.cs
@@ -1,9 +1,10 @@
 using LoaderCalculator.Data.ResultData;
+using StructureHelperCommon.Models.Calculators;
 using StructureHelperCommon.Models.Forces;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 {
-    public interface IForcesTupleResult : INdmResult
+    public interface IForcesTupleResult : IResult
     {
         IDesignForceTuple DesignForceTuple { get; set; }
         ILoaderResults LoaderResults { get; set; }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/Logics/ForceCalculatorUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/Logics/ForceCalculatorUpdateStrategy.cs
new file mode 100644
index 0000000..24a24e3
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/Logics/ForceCalculatorUpdateStrategy.cs
@@ -0,0 +1,26 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperCommon.Models.Sections;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces.Logics
+{
+    public class ForceCalculatorUpdateStrategy : IUpdateStrategy<IForceCalculator>
+    {
+        static readonly AccuracyUpdateStrategy accuracyUpdateStrategy = new();
+        static readonly CompressedMemberUpdateStrategy compressedMemberUpdateStrategy = new();
+        public void Update(IForceCalculator targetObject, IForceCalculator sourceObject)
+        {
+            targetObject.Name = sourceObject.Name;
+            targetObject.LimitStatesList.Clear();
+            targetObject.LimitStatesList.AddRange(sourceObject.LimitStatesList);
+            targetObject.CalcTermsList.Clear();
+            targetObject.CalcTermsList.AddRange(sourceObject.CalcTermsList);
+            accuracyUpdateStrategy.Update(targetObject.Accuracy, sourceObject.Accuracy);
+            compressedMemberUpdateStrategy.Update(targetObject.CompressedMember, sourceObject.CompressedMember);
+            targetObject.Primitives.Clear();
+            targetObject.Primitives.AddRange(sourceObject.Primitives);
+            targetObject.ForceActions.Clear();
+            targetObject.ForceActions.AddRange(sourceObject.ForceActions);
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryCalculator.cs
index eab28ea..0e12ab5 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryCalculator.cs
@@ -1,5 +1,6 @@
 using LoaderCalculator.Data.Matrix;
 using LoaderCalculator.Data.Ndms;
+using StructureHelperCommon.Models.Calculators;
 using StructureHelperLogics.Services.NdmPrimitives;
 using System;
 using System.Collections.Generic;
@@ -15,7 +16,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.Geometry
         IGeometryResult geometryResult;
         public string Name { get; set; }
 
-        public INdmResult Result => geometryResult;
+        public IResult Result => geometryResult;
 
         public GeometryCalculator(IEnumerable<INdm> ndms, IStrainMatrix strainMatrix)
         {
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryCalculator.cs
index 23abb2f..349d38f 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryCalculator.cs
@@ -1,12 +1,8 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using StructureHelperCommon.Models.Calculators;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.Geometry
 {
-    public interface IGeometryCalculator : INdmCalculator
+    public interface IGeometryCalculator : ICalculator
     {
     }
 }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryResult.cs b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryResult.cs
index 7af8250..c036b11 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryResult.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryResult.cs
@@ -1,4 +1,5 @@
-using StructureHelperCommon.Models.Parameters;
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperCommon.Models.Parameters;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -7,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.Geometry
 {
-    public interface IGeometryResult : INdmResult
+    public interface IGeometryResult : IResult
     {
         List<IValueParameter<string>> TextParameters { get; set; }
     }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/Logics/CalculatorUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Analyses/Logics/CalculatorUpdateStrategy.cs
new file mode 100644
index 0000000..96ddf09
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/Logics/CalculatorUpdateStrategy.cs
@@ -0,0 +1,31 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperCommon.Services;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces.Logics;
+using StructureHelperLogics.NdmCalculations.Primitives;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.Logics
+{
+    public class CalculatorUpdateStrategy : IUpdateStrategy<ICalculator>
+    {
+        public void Update(ICalculator targetObject, ICalculator sourceObject)
+        {
+            CheckObject.CompareTypes(targetObject, sourceObject);
+            if (targetObject is IForceCalculator force)
+            {
+                new ForceCalculatorUpdateStrategy().Update(force, (IForceCalculator)sourceObject);
+            }
+            else
+            {
+                ErrorCommonProcessor.ObjectTypeIsUnknown(typeof(INdmPrimitive), sourceObject.GetType());
+            }
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/RC/InputDataFactory.cs b/StructureHelperLogics/NdmCalculations/Analyses/RC/InputDataFactory.cs
index b6bfe53..f8f25a4 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/RC/InputDataFactory.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/RC/InputDataFactory.cs
@@ -15,7 +15,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.RC
     public static class InputDataFactory
     {
         private static IStressLogic stressLogic => new StressLogic();
-        public static IAnchorageInputData GetInputData(ReinforcementPrimitive ndmPrimitive, IStrainMatrix strainMatrix, LimitStates limitState, CalcTerms calcTerm, double lappedCountRate)
+        public static IAnchorageInputData GetInputData(RebarPrimitive ndmPrimitive, IStrainMatrix strainMatrix, LimitStates limitState, CalcTerms calcTerm, double lappedCountRate)
         {
             var inputData = new AnchorageInputData();
             inputData.ConcreteStrength = GetConcreteStrength(limitState, calcTerm, ndmPrimitive);
@@ -43,7 +43,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.RC
             return inputData;
         }
 
-        private static double GetConcreteStrength(LimitStates limitState, CalcTerms calcTerm, ReinforcementPrimitive primitive)
+        private static double GetConcreteStrength(LimitStates limitState, CalcTerms calcTerm, RebarPrimitive primitive)
         {
             if (primitive.HostPrimitive is not null)
             {
@@ -59,7 +59,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.RC
             throw new StructureHelperException(ErrorStrings.DataIsInCorrect + ": host material is incorrect or null");
         }
 
-        private static double GetReinforcementStrength(LimitStates limitState, CalcTerms calcTerm, ReinforcementPrimitive primitive)
+        private static double GetReinforcementStrength(LimitStates limitState, CalcTerms calcTerm, RebarPrimitive primitive)
         {
             if (primitive.HeadMaterial.HelperMaterial is IReinforcementLibMaterial)
             {
diff --git a/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingCalculator.cs b/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingCalculator.cs
index 0a03ff7..b5d972d 100644
--- a/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingCalculator.cs
@@ -24,7 +24,7 @@ namespace StructureHelperLogics.NdmCalculations.Buckling
 
         public string Name { get; set; }
 
-        public INdmResult Result { get; private set; }
+        public IResult Result { get; private set; }
 
         public IAccuracy Accuracy { get; set; }
 
diff --git a/StructureHelperLogics/NdmCalculations/Buckling/IConcreteBucklingCalculator.cs b/StructureHelperLogics/NdmCalculations/Buckling/IConcreteBucklingCalculator.cs
index 6555062..5c01875 100644
--- a/StructureHelperLogics/NdmCalculations/Buckling/IConcreteBucklingCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Buckling/IConcreteBucklingCalculator.cs
@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace StructureHelperLogics.NdmCalculations.Buckling
 {
-    internal interface IConcreteBucklingCalculator : INdmCalculator
+    internal interface IConcreteBucklingCalculator : ICalculator
     {
         IAccuracy Accuracy { get; set; }
     }
diff --git a/StructureHelperLogics/NdmCalculations/Buckling/IConcreteBucklingResult.cs b/StructureHelperLogics/NdmCalculations/Buckling/IConcreteBucklingResult.cs
index 635aa2b..18859eb 100644
--- a/StructureHelperLogics/NdmCalculations/Buckling/IConcreteBucklingResult.cs
+++ b/StructureHelperLogics/NdmCalculations/Buckling/IConcreteBucklingResult.cs
@@ -1,4 +1,5 @@
-using StructureHelperLogics.NdmCalculations.Analyses;
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperLogics.NdmCalculations.Analyses;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -10,7 +11,7 @@ namespace StructureHelperLogics.NdmCalculations.Buckling
     /// <summary>
     /// Results of calculation of buckling of reinforced concrete section
     /// </summary>
-    public interface IConcreteBucklingResult : INdmResult
+    public interface IConcreteBucklingResult : IResult
     {
         /// <summary>
         /// Factor of increasing of bending moment (p-delta effect) in the plain XOZ
diff --git a/StructureHelperLogics/NdmCalculations/Cracking/CrackForceCalculator.cs b/StructureHelperLogics/NdmCalculations/Cracking/CrackForceCalculator.cs
new file mode 100644
index 0000000..ffcb896
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Cracking/CrackForceCalculator.cs
@@ -0,0 +1,100 @@
+using LoaderCalculator.Data.Ndms;
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Services;
+using StructureHelperCommon.Services.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    public class CrackForceCalculator : ICalculator
+    {
+        static readonly CrackedLogic crackedLogic = new();
+        private CrackForceResult result;
+
+        public string Name { get; set; }
+        public IForceTuple StartTuple { get; set; }
+        public IForceTuple EndTuple { get; set; }
+        public IEnumerable<INdm> NdmCollection { get; set; }
+        public Accuracy Accuracy {get;set; }
+        public IResult Result => result;
+        public CrackForceCalculator()
+        {
+            StartTuple ??= new ForceTuple();
+            Accuracy ??= new Accuracy() { IterationAccuracy = 0.0001d, MaxIterationCount = 10000 };
+        }
+
+        public void Run()
+        {
+            result = new CrackForceResult();
+            crackedLogic.StartTuple = StartTuple;
+            crackedLogic.EndTuple = EndTuple;
+            crackedLogic.NdmCollection = NdmCollection;
+            try
+            {
+                Check();
+            }
+            catch(Exception ex)
+            {
+                result.IsValid = false;
+                result.Description += ex;
+                return;
+            }
+            if (crackedLogic.IsSectionCracked(0d) == true)
+            {
+                result.IsValid = true;
+                result.ActualFactor = 0d;
+                result.ActualTuple = (IForceTuple)StartTuple.Clone();
+                result.IsSectionCracked = true;
+                result.Description += "Section cracked in start tuple";
+                return;
+            }
+            if (crackedLogic.IsSectionCracked(1d) == false)
+            {
+                result.IsValid = true;
+                result.IsSectionCracked = false;
+                result.Description = "Section is not cracked";
+                return;
+            }
+            var parameterCalculator = new FindParameterCalculator()
+            {
+                Accuracy = Accuracy,
+                Predicate = crackedLogic.IsSectionCracked
+            };
+            parameterCalculator.Run();
+            var paramResult = parameterCalculator.Result as FindParameterResult;
+            if (paramResult.IsValid == true)
+            {
+                result.IsValid = true;
+                result.IsSectionCracked = true;
+                result.Description += paramResult.Description;
+                result.ActualFactor = paramResult.Parameter;
+                result.ActualTuple = ForceTupleService.InterpolateTuples(EndTuple, StartTuple, paramResult.Parameter);
+            }
+            else
+            {
+                result.IsValid = false;
+                result.Description += paramResult.Description;
+            }
+        }
+
+        private void Check()
+        {
+            CheckObject.IsNull(EndTuple);
+            if (StartTuple == EndTuple)
+            {
+                throw new StructureHelperException(ErrorStrings.DataIsInCorrect + ": Section is not cracked");
+            }
+        }
+
+        public object Clone()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Cracking/CrackForceResult.cs b/StructureHelperLogics/NdmCalculations/Cracking/CrackForceResult.cs
new file mode 100644
index 0000000..07f86c2
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Cracking/CrackForceResult.cs
@@ -0,0 +1,19 @@
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperCommon.Models.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    public class CrackForceResult : IResult
+    {
+        public bool IsValid { get; set; }
+        public string Description { get; set; }
+        public bool IsSectionCracked { get; set; }
+        public double ActualFactor { get; set; }
+        public IForceTuple ActualTuple { get; set; }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Cracking/CrackedLogic.cs b/StructureHelperLogics/NdmCalculations/Cracking/CrackedLogic.cs
new file mode 100644
index 0000000..cea21c5
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Cracking/CrackedLogic.cs
@@ -0,0 +1,34 @@
+using LoaderCalculator.Data.Ndms;
+using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Services.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    internal class CrackedLogic : ICrackedLogic
+    {
+        ISectionCrackedLogic sectionCrackedLogic;
+        public IForceTuple StartTuple { get; set; }
+        public IForceTuple EndTuple { get; set; }
+        public IEnumerable<INdm> NdmCollection { get; set; }
+        public CrackedLogic(ISectionCrackedLogic sectionLogic)
+        {
+            sectionCrackedLogic = sectionLogic;
+        }
+        public CrackedLogic() : this (new HoleSectionCrackedLogic())
+        {
+            
+        }
+        public bool IsSectionCracked(double factor)
+        {
+            var actualTuple = ForceTupleService.InterpolateTuples(EndTuple, StartTuple, factor);
+            sectionCrackedLogic.Tuple = actualTuple;
+            sectionCrackedLogic.NdmCollection = NdmCollection;
+            return sectionCrackedLogic.IsSectionCracked();
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Cracking/ExponentialSofteningLogic.cs b/StructureHelperLogics/NdmCalculations/Cracking/ExponentialSofteningLogic.cs
new file mode 100644
index 0000000..d22ff91
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Cracking/ExponentialSofteningLogic.cs
@@ -0,0 +1,59 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    public class ExponentialSofteningLogic : ICrackSofteningLogic
+    {
+        private double forceRatio;
+        private double powerFactor;
+
+        public double PowerFactor
+        {
+            get => powerFactor;
+            set
+            {
+                if (value < 0)
+                {
+                    throw new StructureHelperException(ErrorStrings.DataIsInCorrect + ": Power Factor must not be less than zero");
+                }
+                powerFactor = value;
+            }
+        }
+        public double BettaFactor { get; set; }
+        public double ForceRatio
+        {
+            get => forceRatio;
+            set
+            {
+                if (value < 0)
+                {
+                    throw new StructureHelperException(ErrorStrings.DataIsInCorrect + ": Force Ratio must not be less than zero");
+                }
+                else if (value > 1)
+                {
+                    throw new StructureHelperException(ErrorStrings.DataIsInCorrect + ": Force Ratio must not be greater than 1.0");
+                }
+                forceRatio = value;
+            }
+        }
+        public double FiMin {get;set;}
+        public ExponentialSofteningLogic()
+        {
+            FiMin = 0.2d;
+            PowerFactor = 2d;
+            BettaFactor = 0.8;
+        }
+        public double SofteningFactor()
+        {
+            double fi;
+            fi = 1 - BettaFactor * Math.Pow(ForceRatio, PowerFactor);
+            fi = Math.Max(fi, FiMin);
+            return fi;
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Cracking/HoleSectionCrackedLogic.cs b/StructureHelperLogics/NdmCalculations/Cracking/HoleSectionCrackedLogic.cs
new file mode 100644
index 0000000..23e82a3
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Cracking/HoleSectionCrackedLogic.cs
@@ -0,0 +1,47 @@
+using LoaderCalculator.Data.Ndms;
+using LoaderCalculator.Logics;
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperCommon.Models.Forces;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    internal class HoleSectionCrackedLogic : ISectionCrackedLogic
+    {
+        static readonly IStressLogic stressLogic = new StressLogic();
+        public IForceTuple Tuple { get; set; }
+        public IEnumerable<INdm> NdmCollection { get; set; }
+        public Accuracy Accuracy { get; set; }
+        public HoleSectionCrackedLogic()
+        {
+            if (Accuracy is null)
+            {
+                Accuracy = new Accuracy() { IterationAccuracy = 0.001d, MaxIterationCount = 10000 };
+            }
+        }
+        public bool IsSectionCracked()
+        {
+            var inputData = new ForceTupleInputData()
+            {
+                Accuracy = Accuracy,
+                Tuple = Tuple,
+                NdmCollection = NdmCollection
+            };
+            var calculator = new ForceTupleCalculator(inputData);
+            calculator.Run();
+            var calcResult = calculator.Result as ForcesTupleResult;
+            if (calcResult.IsValid == false)
+            {
+                throw new StructureHelperException(ErrorStrings.ResultIsNotValid + ": Result of Section Calculation is not valid");
+            }
+            var strainMatrix = calcResult.LoaderResults.ForceStrainPair.StrainMatrix;
+            return stressLogic.IsSectionCracked(strainMatrix, NdmCollection);
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Cracking/ICrackSofteningLogic.cs b/StructureHelperLogics/NdmCalculations/Cracking/ICrackSofteningLogic.cs
new file mode 100644
index 0000000..f897ef5
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Cracking/ICrackSofteningLogic.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    public interface ICrackSofteningLogic
+    {
+        double SofteningFactor();
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Cracking/ICrackedLogic.cs b/StructureHelperLogics/NdmCalculations/Cracking/ICrackedLogic.cs
new file mode 100644
index 0000000..0561c57
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Cracking/ICrackedLogic.cs
@@ -0,0 +1,18 @@
+using LoaderCalculator.Data.Ndms;
+using StructureHelperCommon.Models.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    internal interface ICrackedLogic
+    {
+        IForceTuple StartTuple { get; set; }
+        IForceTuple EndTuple { get; set; }
+        IEnumerable<INdm> NdmCollection { get; set; }
+        bool IsSectionCracked(double factor);
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Cracking/ISectionCrackedLogic.cs b/StructureHelperLogics/NdmCalculations/Cracking/ISectionCrackedLogic.cs
new file mode 100644
index 0000000..a73498a
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Cracking/ISectionCrackedLogic.cs
@@ -0,0 +1,17 @@
+using LoaderCalculator.Data.Ndms;
+using StructureHelperCommon.Models.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    internal interface ISectionCrackedLogic
+    {
+        IForceTuple Tuple { get; set; }
+        IEnumerable<INdm> NdmCollection { get; set; }
+        bool IsSectionCracked();
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/CirclePrimitive.cs b/StructureHelperLogics/NdmCalculations/Primitives/CirclePrimitive.cs
index d8ec17a..a7638fd 100644
--- a/StructureHelperLogics/NdmCalculations/Primitives/CirclePrimitive.cs
+++ b/StructureHelperLogics/NdmCalculations/Primitives/CirclePrimitive.cs
@@ -3,24 +3,20 @@ using LoaderCalculator.Data.Ndms;
 using StructureHelper.Models.Materials;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperCommon.Models.Shapes;
-using StructureHelperCommon.Services.ShapeServices;
 using StructureHelperLogics.Models.CrossSections;
 using StructureHelperLogics.NdmCalculations.Triangulations;
-using StructureHelperLogics.Services.NdmPrimitives;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace StructureHelperLogics.NdmCalculations.Primitives
 {
     public class CirclePrimitive : ICirclePrimitive
     {
+        static readonly CircleUpdateStrategy updateStrategy = new();
+        /// <inheritdoc/>
         public Guid Id { get; set; }
+        /// <inheritdoc/>
         public string Name { get; set; }
-        public double CenterX { get; set; }
-        public double CenterY { get; set; }
+        /// <inheritdoc/>
+        public IPoint2D Center { get; private set; }
         public IHeadMaterial? HeadMaterial { get; set; }
         public StrainTuple UsersPrestrain { get; }
         public StrainTuple AutoPrestrain { get; }
@@ -32,12 +28,14 @@ namespace StructureHelperLogics.NdmCalculations.Primitives
         public bool Triangulate { get; set; }
         public ICrossSection? CrossSection { get; set; }
 
+
         public CirclePrimitive(Guid id)
         {
             Id = id;
             Name = "New Circle";
             NdmMaxSize = 0.01d;
             NdmMinDivision = 10;
+            Center = new Point2D();
             VisualProperty = new VisualProperty { Opacity = 0.8d };
             UsersPrestrain = new StrainTuple();
             AutoPrestrain = new StrainTuple();
@@ -46,16 +44,14 @@ namespace StructureHelperLogics.NdmCalculations.Primitives
         }
         public CirclePrimitive() : this (Guid.NewGuid())
         {}
-
+        /// <inheritdoc/>
         public object Clone()
         {
             var primitive = new CirclePrimitive();
-            NdmPrimitivesService.CopyNdmProperties(this, primitive);
-            NdmPrimitivesService.CopyDivisionProperties(this, primitive);
-            ShapeService.CopyCircleProperties(this, primitive);
+            updateStrategy.Update(primitive, this);
             return primitive;
         }
-
+        /// <inheritdoc/>
         public IEnumerable<INdm> GetNdms(IMaterial material)
         {
             var ndms = new List<INdm>();
@@ -64,24 +60,14 @@ namespace StructureHelperLogics.NdmCalculations.Primitives
             ndms.AddRange(logic.GetNdmCollection(material));
             return ndms;
         }
-
-        public void Save()
-        {
-            throw new NotImplementedException();
-        }
-
+        /// <inheritdoc/>
         public bool IsPointInside(IPoint2D point)
         {
-            var dX = CenterX - point.X;
-            var dY = CenterY - point.Y;
+            var dX = Center.X - point.X;
+            var dY = Center.Y - point.Y;
             var distance = Math.Sqrt(dX * dX + dY * dY);
             if (distance > Diameter / 2) { return false; }
             return true;
         }
-
-        public void Load()
-        {
-            throw new NotImplementedException();
-        }
     }
 }
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/INdmPrimitive.cs b/StructureHelperLogics/NdmCalculations/Primitives/INdmPrimitive.cs
index 8d15eef..d407ba8 100644
--- a/StructureHelperLogics/NdmCalculations/Primitives/INdmPrimitive.cs
+++ b/StructureHelperLogics/NdmCalculations/Primitives/INdmPrimitive.cs
@@ -15,8 +15,7 @@ namespace StructureHelperLogics.NdmCalculations.Primitives
     public interface INdmPrimitive : ISaveable, ICloneable
     {
         string? Name { get; set; }
-        double CenterX { get; set; }
-        double CenterY { get; set; }
+        IPoint2D Center { get; }
         ICrossSection? CrossSection { get; set; }
         IHeadMaterial? HeadMaterial { get; set; }
         /// <summary>
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/LinePrimitive.cs b/StructureHelperLogics/NdmCalculations/Primitives/LinePrimitive.cs
index d47f2cf..c092739 100644
--- a/StructureHelperLogics/NdmCalculations/Primitives/LinePrimitive.cs
+++ b/StructureHelperLogics/NdmCalculations/Primitives/LinePrimitive.cs
@@ -1,17 +1,9 @@
 using LoaderCalculator.Data.Materials;
 using LoaderCalculator.Data.Ndms;
 using StructureHelper.Models.Materials;
-using StructureHelperCommon.Infrastructures.Interfaces;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperCommon.Models.Shapes;
-using StructureHelperCommon.Services.ShapeServices;
-using StructureHelperLogics.Models.Primitives;
 using StructureHelperLogics.Services.NdmPrimitives;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace StructureHelperLogics.NdmCalculations.Primitives
 {
@@ -54,8 +46,8 @@ namespace StructureHelperLogics.NdmCalculations.Primitives
         public object Clone()
         {
             var primitive = new LinePrimitive();
-            NdmPrimitivesService.CopyDivisionProperties(this, primitive);
-            ShapeService.CopyLineProperties(this, primitive);
+            throw new NotImplementedException();
+
             return primitive;
         }
 
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/Logics/BaseUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Primitives/Logics/BaseUpdateStrategy.cs
new file mode 100644
index 0000000..9862a35
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Primitives/Logics/BaseUpdateStrategy.cs
@@ -0,0 +1,30 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Models.Shapes.Logics;
+using StructureHelperCommon.Services.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    internal class BaseUpdateStrategy : IUpdateStrategy<INdmPrimitive>
+    {
+        static readonly PointShapeUpdateStrategy pointShapeUpdateStrategy = new();
+        readonly ForceTupleUpdateStrategy tupleUpdateStrategy = new();
+        readonly VisualPropsUpdateStrategy visualPropsUpdateStrategy = new();
+
+        public void Update(INdmPrimitive target, INdmPrimitive source)
+        {
+            target.Name = source.Name;
+            if (source.HeadMaterial != null) target.HeadMaterial = source.HeadMaterial;
+            target.Triangulate = source.Triangulate;
+            pointShapeUpdateStrategy.Update(target.Center, source.Center);
+            visualPropsUpdateStrategy.Update(target.VisualProperty, source.VisualProperty);
+            tupleUpdateStrategy.Update(target.UsersPrestrain, source.UsersPrestrain);
+        }
+
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/Logics/CircleUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Primitives/Logics/CircleUpdateStrategy.cs
new file mode 100644
index 0000000..960f38b
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Primitives/Logics/CircleUpdateStrategy.cs
@@ -0,0 +1,24 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Shapes;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    internal class CircleUpdateStrategy : IUpdateStrategy<CirclePrimitive>
+    {
+        static readonly BaseUpdateStrategy basePrimitiveUpdateStrategy = new();
+        static readonly DivisionPropsUpdateStrategy divisionPropsUpdateStrategy = new();
+        static readonly CircleShapeUpdateStrategy shapeUpdateStrategy = new();
+
+        public void Update(CirclePrimitive targetObject, CirclePrimitive sourceObject)
+        {
+            basePrimitiveUpdateStrategy.Update(targetObject, sourceObject);
+            divisionPropsUpdateStrategy.Update(targetObject, sourceObject);
+            shapeUpdateStrategy.Update(targetObject, sourceObject);
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/Logics/DivisionPropsUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Primitives/Logics/DivisionPropsUpdateStrategy.cs
new file mode 100644
index 0000000..1e51b18
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Primitives/Logics/DivisionPropsUpdateStrategy.cs
@@ -0,0 +1,19 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    internal class DivisionPropsUpdateStrategy : IUpdateStrategy<IHasDivisionSize>
+    {
+        public void Update(IHasDivisionSize targetObject, IHasDivisionSize sourceObject)
+        {
+            targetObject.NdmMaxSize = sourceObject.NdmMaxSize;
+            targetObject.NdmMinDivision = sourceObject.NdmMinDivision;
+            targetObject.ClearUnderlying = sourceObject.ClearUnderlying;
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/Logics/NdmPrimitiveUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Primitives/Logics/NdmPrimitiveUpdateStrategy.cs
new file mode 100644
index 0000000..3d6a46d
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Primitives/Logics/NdmPrimitiveUpdateStrategy.cs
@@ -0,0 +1,35 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Services;
+using StructureHelperLogics.Models.Primitives;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    public class NdmPrimitiveUpdateStrategy : IUpdateStrategy<INdmPrimitive>
+    {
+        public void Update(INdmPrimitive targetObject, INdmPrimitive sourceObject)
+        {
+            CheckObject.CompareTypes(targetObject, sourceObject);
+            if (targetObject is PointPrimitive point)
+            {
+                new PointUpdateStrategy().Update(point, (PointPrimitive)sourceObject);
+            }
+            else if (targetObject is RebarPrimitive rebar)
+            {
+                new RebarUpdateStrategy().Update(rebar, (RebarPrimitive)sourceObject);
+            }
+            else if (targetObject is RectanglePrimitive rectangle)
+            {
+                new RectangleUpdateStrategy().Update(rectangle, (RectanglePrimitive)sourceObject);
+            }
+            else if (targetObject is CirclePrimitive circle)
+            {
+                new CircleUpdateStrategy().Update(circle, (CirclePrimitive)sourceObject);
+            }
+            else
+            {
+                ErrorCommonProcessor.ObjectTypeIsUnknown(typeof(INdmPrimitive), sourceObject.GetType());
+            }
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/Logics/PointUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Primitives/Logics/PointUpdateStrategy.cs
new file mode 100644
index 0000000..e3f8a4b
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Primitives/Logics/PointUpdateStrategy.cs
@@ -0,0 +1,20 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperLogics.Models.Primitives;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    internal class PointUpdateStrategy : IUpdateStrategy<PointPrimitive>
+    {
+        static readonly BaseUpdateStrategy basePrimitiveUpdateStrategy = new();
+        public void Update(PointPrimitive targetObject, PointPrimitive sourceObject)
+        {
+            basePrimitiveUpdateStrategy.Update(targetObject, sourceObject);
+            targetObject.Area = sourceObject.Area;
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/Logics/RebarUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Primitives/Logics/RebarUpdateStrategy.cs
new file mode 100644
index 0000000..43be8c7
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Primitives/Logics/RebarUpdateStrategy.cs
@@ -0,0 +1,20 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    internal class RebarUpdateStrategy : IUpdateStrategy<RebarPrimitive>
+    {
+        static readonly BaseUpdateStrategy basePrimitiveUpdateStrategy = new();
+        public void Update(RebarPrimitive targetObject, RebarPrimitive sourceObject)
+        {
+            basePrimitiveUpdateStrategy.Update(targetObject, sourceObject);
+            targetObject.Area = sourceObject.Area;
+            targetObject.HostPrimitive = sourceObject.HostPrimitive;
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/Logics/RectangleUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Primitives/Logics/RectangleUpdateStrategy.cs
new file mode 100644
index 0000000..f5b5aa1
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Primitives/Logics/RectangleUpdateStrategy.cs
@@ -0,0 +1,23 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Shapes;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    internal class RectangleUpdateStrategy : IUpdateStrategy<RectanglePrimitive>
+    {
+        static readonly BaseUpdateStrategy basePrimitiveUpdateStrategy = new();
+        static readonly DivisionPropsUpdateStrategy divisionPropsUpdateStrategy = new();
+        static readonly RectangleShapeUpdateStrategy shapeUpdateStrategy = new();
+        public void Update(RectanglePrimitive targetObject, RectanglePrimitive sourceObject)
+        {
+            basePrimitiveUpdateStrategy.Update(targetObject, sourceObject);
+            divisionPropsUpdateStrategy.Update(targetObject, sourceObject);
+            shapeUpdateStrategy.Update(targetObject, sourceObject);
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/Logics/VisualPropsUpdateStrategy.cs b/StructureHelperLogics/NdmCalculations/Primitives/Logics/VisualPropsUpdateStrategy.cs
new file mode 100644
index 0000000..b7a4b96
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Primitives/Logics/VisualPropsUpdateStrategy.cs
@@ -0,0 +1,21 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    public class VisualPropsUpdateStrategy : IUpdateStrategy<IVisualProperty>
+    {
+        public void Update(IVisualProperty targetObject, IVisualProperty sourceObject)
+        {
+            targetObject.IsVisible = sourceObject.IsVisible;
+            targetObject.Color = sourceObject.Color;
+            targetObject.SetMaterialColor = sourceObject.SetMaterialColor;
+            targetObject.Opacity = sourceObject.Opacity;
+            targetObject.ZIndex = sourceObject.ZIndex;
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/PointPrimitive.cs b/StructureHelperLogics/NdmCalculations/Primitives/PointPrimitive.cs
index 0925e4d..b17e102 100644
--- a/StructureHelperLogics/NdmCalculations/Primitives/PointPrimitive.cs
+++ b/StructureHelperLogics/NdmCalculations/Primitives/PointPrimitive.cs
@@ -16,10 +16,10 @@ namespace StructureHelperLogics.Models.Primitives
 {
     public class PointPrimitive : IPointPrimitive
     {
+        static readonly PointUpdateStrategy updateStrategy = new();
         public Guid Id { get; }
         public string? Name { get; set; }
-        public double CenterX { get; set; }
-        public double CenterY { get; set; }
+        public IPoint2D Center { get; private set; }
         public IHeadMaterial HeadMaterial { get; set; }
         //public double NdmMaxSize { get; set; }
         //public int NdmMinDivision { get; set; }
@@ -31,11 +31,13 @@ namespace StructureHelperLogics.Models.Primitives
         public bool Triangulate { get; set; }
         public ICrossSection? CrossSection { get; set; }
 
+
         public PointPrimitive(Guid id)
         {
             Id = id;
             Name = "New Point";
             Area = 0.0005d;
+            Center = new Point2D();
             VisualProperty = new VisualProperty();
             UsersPrestrain = new StrainTuple();
             AutoPrestrain = new StrainTuple();
@@ -52,16 +54,10 @@ namespace StructureHelperLogics.Models.Primitives
             return logic.GetNdmCollection(material);
         }
 
-        public void Save()
-        {
-            throw new NotImplementedException();
-        }
-
         public object Clone()
         { 
             var primitive = new PointPrimitive();
-            NdmPrimitivesService.CopyNdmProperties(this, primitive);
-            primitive.Area = Area;
+            updateStrategy.Update(primitive, this);
             return primitive;
         }
     }
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/ReinforcementPrimitive.cs b/StructureHelperLogics/NdmCalculations/Primitives/RebarPrimitive.cs
similarity index 78%
rename from StructureHelperLogics/NdmCalculations/Primitives/ReinforcementPrimitive.cs
rename to StructureHelperLogics/NdmCalculations/Primitives/RebarPrimitive.cs
index c53058f..87d7291 100644
--- a/StructureHelperLogics/NdmCalculations/Primitives/ReinforcementPrimitive.cs
+++ b/StructureHelperLogics/NdmCalculations/Primitives/RebarPrimitive.cs
@@ -3,7 +3,9 @@ using LoaderCalculator.Data.Ndms;
 using StructureHelper.Models.Materials;
 using StructureHelperCommon.Infrastructures.Interfaces;
 using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Models.Shapes;
 using StructureHelperLogics.Models.CrossSections;
+using StructureHelperLogics.Models.Materials;
 using StructureHelperLogics.Models.Primitives;
 using StructureHelperLogics.NdmCalculations.Triangulations;
 using StructureHelperLogics.Services.NdmPrimitives;
@@ -17,15 +19,14 @@ using System.Windows.Media.Media3D;
 namespace StructureHelperLogics.NdmCalculations.Primitives
 {
     /// <inheritdoc/>
-    public class ReinforcementPrimitive : IPointPrimitive, IHasHostPrimitive
+    public class RebarPrimitive : IPointPrimitive, IHasHostPrimitive
     {
-        IDataRepository<ReinforcementPrimitive> repository;
+        static readonly RebarUpdateStrategy updateStrategy = new();
+        IDataRepository<RebarPrimitive> repository;
         /// <inheritdoc/>
         public string Name { get; set; }
         /// <inheritdoc/>
-        public double CenterX { get; set; }
-        /// <inheritdoc/>
-        public double CenterY { get; set; }
+        public IPoint2D Center { get; private set; }
         /// <inheritdoc/>
         public IHeadMaterial? HeadMaterial { get; set; }
         public bool Triangulate { get; set; }
@@ -41,27 +42,27 @@ namespace StructureHelperLogics.NdmCalculations.Primitives
         public INdmPrimitive HostPrimitive { get; set; }
         public ICrossSection? CrossSection { get; set; }
 
-        public ReinforcementPrimitive(Guid id)
+
+        public RebarPrimitive(Guid id)
         {
             Id = id;
             Name = "New Reinforcement";
             Area = 0.0005d;
+            Center = new Point2D();
             VisualProperty = new VisualProperty();
             UsersPrestrain = new StrainTuple();
             AutoPrestrain = new StrainTuple();
             Triangulate = true;
         }
-        public ReinforcementPrimitive() : this(Guid.NewGuid())
+        public RebarPrimitive() : this(Guid.NewGuid())
         {
                 
         }
 
         public object Clone()
         {
-            var primitive = new ReinforcementPrimitive();
-            NdmPrimitivesService.CopyNdmProperties(this, primitive);
-            primitive.Area = Area;
-            primitive.HostPrimitive = HostPrimitive;
+            var primitive = new RebarPrimitive();
+            updateStrategy.Update(primitive, this);
             return primitive;
         }
 
diff --git a/StructureHelperLogics/NdmCalculations/Primitives/RectanglePrimitive.cs b/StructureHelperLogics/NdmCalculations/Primitives/RectanglePrimitive.cs
index 9836c0e..a75678b 100644
--- a/StructureHelperLogics/NdmCalculations/Primitives/RectanglePrimitive.cs
+++ b/StructureHelperLogics/NdmCalculations/Primitives/RectanglePrimitive.cs
@@ -1,28 +1,18 @@
 using LoaderCalculator.Data.Materials;
 using LoaderCalculator.Data.Ndms;
 using StructureHelper.Models.Materials;
-using StructureHelperCommon.Infrastructures.Interfaces;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperCommon.Models.Shapes;
-using StructureHelperCommon.Services.ShapeServices;
 using StructureHelperLogics.Models.CrossSections;
-using StructureHelperLogics.Models.Primitives;
 using StructureHelperLogics.NdmCalculations.Triangulations;
-using StructureHelperLogics.Services.NdmPrimitives;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace StructureHelperLogics.NdmCalculations.Primitives
 {
     public class RectanglePrimitive : IRectanglePrimitive
     {
+        readonly RectangleUpdateStrategy updateStrategy = new();
         public Guid Id { get;}
         public string Name { get; set; }
-        public double CenterX { get; set; }
-        public double CenterY { get; set; }
         public IHeadMaterial? HeadMaterial { get; set; }
         public StrainTuple UsersPrestrain { get; private set; }
         public StrainTuple AutoPrestrain { get; private set; }
@@ -36,12 +26,15 @@ namespace StructureHelperLogics.NdmCalculations.Primitives
         public IVisualProperty VisualProperty { get; }
         public ICrossSection? CrossSection { get; set; }
 
+        public IPoint2D Center { get; private set; }
+
         public RectanglePrimitive(Guid id)
         {
             Id = id;
             Name = "New Rectangle";
             NdmMaxSize = 0.01d;
             NdmMinDivision = 10;
+            Center = new Point2D();
             VisualProperty = new VisualProperty { Opacity = 0.8d};
             UsersPrestrain = new StrainTuple();
             AutoPrestrain = new StrainTuple();
@@ -58,9 +51,7 @@ namespace StructureHelperLogics.NdmCalculations.Primitives
         public object Clone()
         {
             var primitive = new RectanglePrimitive();
-            NdmPrimitivesService.CopyNdmProperties(this, primitive);
-            NdmPrimitivesService.CopyDivisionProperties(this, primitive);
-            ShapeService.CopyRectangleProperties(this, primitive);
+            updateStrategy.Update(primitive, this);
             return primitive;
         }
 
@@ -73,17 +64,12 @@ namespace StructureHelperLogics.NdmCalculations.Primitives
             return ndms;
         }
 
-        public void Save()
-        {
-            throw new NotImplementedException();
-        }
-
         public bool IsPointInside(IPoint2D point)
         {
-            var xMax = CenterX + Width / 2;
-            var xMin = CenterX - Width / 2;
-            var yMax = CenterY + Height / 2;
-            var yMin = CenterY - Height / 2;
+            var xMax = Center.X + Width / 2;
+            var xMin = Center.X - Width / 2;
+            var yMax = Center.Y + Height / 2;
+            var yMin = Center.Y - Height / 2;
             if (point.X > xMax ||
                 point.X < xMin ||
                 point.Y > yMax ||
diff --git a/StructureHelperLogics/NdmCalculations/Triangulations/CircleTriangulationLogicOptions.cs b/StructureHelperLogics/NdmCalculations/Triangulations/CircleTriangulationLogicOptions.cs
index 5f322f4..1c8bfed 100644
--- a/StructureHelperLogics/NdmCalculations/Triangulations/CircleTriangulationLogicOptions.cs
+++ b/StructureHelperLogics/NdmCalculations/Triangulations/CircleTriangulationLogicOptions.cs
@@ -23,7 +23,7 @@ namespace StructureHelperLogics.NdmCalculations.Triangulations
 
         public CircleTriangulationLogicOptions(ICirclePrimitive primitive)
         {
-            Center = new Point2D() { X = primitive.CenterX, Y = primitive.CenterY };
+            Center = new Point2D() { X = primitive.Center.X, Y = primitive.Center.Y };
             Circle = primitive;
             NdmMaxSize = primitive.NdmMaxSize;
             NdmMinDivision = primitive.NdmMinDivision;
diff --git a/StructureHelperLogics/NdmCalculations/Triangulations/PointTriangulationLogicOptions.cs b/StructureHelperLogics/NdmCalculations/Triangulations/PointTriangulationLogicOptions.cs
index 4a4647c..958e364 100644
--- a/StructureHelperLogics/NdmCalculations/Triangulations/PointTriangulationLogicOptions.cs
+++ b/StructureHelperLogics/NdmCalculations/Triangulations/PointTriangulationLogicOptions.cs
@@ -28,7 +28,7 @@ namespace StructureHelperLogics.NdmCalculations.Triangulations
 
         public PointTriangulationLogicOptions(IPointPrimitive primitive)
         {
-            Center = new Point2D() { X = primitive.CenterX, Y = primitive.CenterY };
+            Center = new Point2D() { X = primitive.Center.X, Y = primitive.Center.Y };
             Area = primitive.Area;
             Prestrain = new StrainTuple
             {
diff --git a/StructureHelperLogics/NdmCalculations/Triangulations/RectangleTriangulationLogicOptions.cs b/StructureHelperLogics/NdmCalculations/Triangulations/RectangleTriangulationLogicOptions.cs
index 7ddf722..5a8616e 100644
--- a/StructureHelperLogics/NdmCalculations/Triangulations/RectangleTriangulationLogicOptions.cs
+++ b/StructureHelperLogics/NdmCalculations/Triangulations/RectangleTriangulationLogicOptions.cs
@@ -29,7 +29,7 @@ namespace StructureHelperLogics.NdmCalculations.Triangulations
 
         public RectangleTriangulationLogicOptions(IRectanglePrimitive primitive)
         {
-            Center = new Point2D() { X = primitive.CenterX, Y = primitive.CenterY };
+            Center = new Point2D() {X = primitive.Center.X, Y = primitive.Center.Y };
             Rectangle = primitive;
             NdmMaxSize = primitive.NdmMaxSize;
             NdmMinDivision = primitive.NdmMinDivision;
diff --git a/StructureHelperLogics/Services/NdmCalculations/InterpolateService.cs b/StructureHelperLogics/Services/NdmCalculations/InterpolateService.cs
index 64d8391..73b9ea8 100644
--- a/StructureHelperLogics/Services/NdmCalculations/InterpolateService.cs
+++ b/StructureHelperLogics/Services/NdmCalculations/InterpolateService.cs
@@ -1,18 +1,13 @@
 using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Models.Sections;
 using StructureHelperCommon.Services.Forces;
-using StructureHelperCommon.Services.Sections;
-using StructureHelperLogics.Models.Primitives;
 using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace StructureHelperLogics.Services.NdmCalculations
 {
     public static class InterpolateService
     {
+        static readonly CompressedMemberUpdateStrategy compressedMemberUpdateStrategy = new();
         public static IForceCalculator InterpolateForceCalculator(IForceCalculator source, IDesignForceTuple finishDesignForce,IDesignForceTuple startDesignForce, int stepCount)
         {
             IForceCalculator calculator = new ForceCalculator();
@@ -20,7 +15,7 @@ namespace StructureHelperLogics.Services.NdmCalculations
             calculator.LimitStatesList.Add(finishDesignForce.LimitState);
             calculator.CalcTermsList.Clear();
             calculator.CalcTermsList.Add(finishDesignForce.CalcTerm);
-            CompressedMemberServices.CopyProperties(source.CompressedMember, calculator.CompressedMember);
+            compressedMemberUpdateStrategy.Update(calculator.CompressedMember, source.CompressedMember);
             calculator.Accuracy = source.Accuracy;
             calculator.Primitives.AddRange(source.Primitives);
             calculator.ForceActions.Clear();
diff --git a/StructureHelperLogics/Services/NdmPrimitives/NdmPrimitivesService.cs b/StructureHelperLogics/Services/NdmPrimitives/NdmPrimitivesService.cs
index 5b5a8a4..21f5118 100644
--- a/StructureHelperLogics/Services/NdmPrimitives/NdmPrimitivesService.cs
+++ b/StructureHelperLogics/Services/NdmPrimitives/NdmPrimitivesService.cs
@@ -19,32 +19,6 @@ namespace StructureHelperLogics.Services.NdmPrimitives
 {
     public static class NdmPrimitivesService
     {
-        public static void CopyVisualProperty(IVisualProperty source, IVisualProperty target)
-        {
-            target.IsVisible = source.IsVisible;
-            target.Color = source.Color;
-            target.SetMaterialColor = source.SetMaterialColor;
-            target.Opacity = source.Opacity;
-            target.ZIndex = source.ZIndex;
-        }
-
-        public static void CopyNdmProperties (INdmPrimitive source, INdmPrimitive target)
-        {
-            target.Name = source.Name + " copy" ;
-            if (source.HeadMaterial != null) target.HeadMaterial = source.HeadMaterial;
-            CopyVisualProperty(source.VisualProperty, target.VisualProperty);
-            target.CenterX = source.CenterX;
-            target.CenterY = source.CenterY;
-            target.Triangulate = source.Triangulate;
-            ForceTupleService.CopyProperties(source.UsersPrestrain, target.UsersPrestrain);
-        }
-
-        public static void CopyDivisionProperties(IHasDivisionSize source, IHasDivisionSize target)
-        {
-            target.NdmMaxSize = source.NdmMaxSize;
-            target.NdmMinDivision = source.NdmMinDivision;
-            target.ClearUnderlying = source.ClearUnderlying;
-        }
         public static List<INdm> GetNdms(INdmPrimitive primitive, LimitStates limitState, CalcTerms calcTerm)
         {
             //Формируем коллекцию элементарных участков для расчета в библитеке (т.е. выполняем триангуляцию)
diff --git a/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs b/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs
index 0cbac64..1c4295b 100644
--- a/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs
+++ b/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs
@@ -37,7 +37,6 @@ namespace StructureHelperLogics.Services.NdmPrimitives
             parameters.AddRange(GetMomentOfInertiaRatio(ndms, strainMatrix));
             return parameters;
         }
-
         private IEnumerable<IValueParameter<string>> GetSimpleArea(IEnumerable<INdm> ndms)
         {
             const string name = "Summary Area";
@@ -67,7 +66,6 @@ namespace StructureHelperLogics.Services.NdmPrimitives
             parameters.Add(firstParameter);
             return parameters;
         }
-
         private IEnumerable<IValueParameter<string>> GetMomentOfInertia(string prefix, IEnumerable<INdm> locNdms, IStrainMatrix? locStrainMatrix = null)
         {
             const string name = "Bending stiffness";
diff --git a/StructureHelperTests/FunctionalTests/Ndms/Calculators/CrackCalculatorTests/CrackCalculatorTest.cs b/StructureHelperTests/FunctionalTests/Ndms/Calculators/CrackCalculatorTests/CrackCalculatorTest.cs
new file mode 100644
index 0000000..4706ed4
--- /dev/null
+++ b/StructureHelperTests/FunctionalTests/Ndms/Calculators/CrackCalculatorTests/CrackCalculatorTest.cs
@@ -0,0 +1,41 @@
+using LoaderCalculator.Tests.Infrastructures.Logics;
+using Moq;
+using NUnit.Framework;
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Services.Forces;
+using StructureHelperLogics.Models.Calculations.CalculationProperties;
+using StructureHelperLogics.Models.Templates.CrossSections.RCs;
+using StructureHelperLogics.Models.Templates.RCs;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using StructureHelperLogics.NdmCalculations.Cracking;
+using StructureHelperLogics.NdmCalculations.Primitives;
+using StructureHelperLogics.NdmCalculations.Triangulations;
+
+namespace StructureHelperTests.FunctionalTests.Ndms.Calculators.CrackCalculatorTests
+
+{
+    internal class CrackCalculatorTest
+    {
+        [TestCase(0.4d, 0.6d, 0.012d, 0.025d, 2, 2, 0.81d)]
+        public void Run_ShouldPass(double width, double height, double topDiametr, double bottomDiametr, int widthCount, int heightCount, double expectedFactor)
+        {
+            //Arrange
+            var template = new RectangleBeamTemplate(width, height) { TopDiameter = topDiametr, BottomDiameter = bottomDiametr, WidthCount = widthCount, HeightCount = heightCount };
+            var newSection = new SectionTemplate(new RectGeometryLogic(template)).GetCrossSection();
+            var ndmPrimitives = newSection.SectionRepository.Primitives;
+            ITriangulationOptions options = new TriangulationOptions { LimiteState = LimitStates.SLS, CalcTerm = CalcTerms.ShortTerm };
+            var ndms = Triangulation.GetNdms(ndmPrimitives, options);
+            var calculator = new CrackForceCalculator();
+            calculator.EndTuple = new ForceTuple() { Mx = -50e3d, My = -50e3d, Nz = 0d };
+            calculator.NdmCollection = ndms;
+            //Act
+            calculator.Run();
+            var result = (CrackForceResult)calculator.Result;
+            //Assert
+            Assert.NotNull(result);
+            Assert.IsTrue(result.IsValid);
+            Assert.AreEqual(expectedFactor, result.ActualFactor, 0.01d);
+        }
+    }
+}
diff --git a/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionTest.cs b/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionTest.cs
index 0c61861..7213919 100644
--- a/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionTest.cs
+++ b/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionTest.cs
@@ -65,7 +65,7 @@ namespace StructureHelperTests.FunctionalTests.Ndms.RCSections
         {
             
             var material = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Concrete40);
-            var primitive = new RectanglePrimitive(material) {CenterX = 0, CenterY = 0, Width = width, Height = height, NdmMaxSize = 1, NdmMinDivision = 20 };
+            var primitive = new RectanglePrimitive(material) {Width = width, Height = height, NdmMaxSize = 1, NdmMinDivision = 20 };
             List<INdmPrimitive> primitives = new List<INdmPrimitive> {primitive};
             return primitives;
         }
@@ -81,16 +81,24 @@ namespace StructureHelperTests.FunctionalTests.Ndms.RCSections
             List<INdmPrimitive> primitives = new List<INdmPrimitive>();
             INdmPrimitive primitive;
             //Right top bar
-            primitive = new PointPrimitive(material) { Area = topArea, CenterX = centerRT.X, CenterY = centerRT.Y };
+            primitive = new PointPrimitive(material) { Area = topArea};
+            primitive.Center.X = centerRT.X;
+            primitive.Center.Y = centerRT.Y;
             primitives.Add(primitive);
             //Left top bar
-            primitive = new PointPrimitive(material) { Area = topArea, CenterX = centerLT.X, CenterY = centerLT.Y };
+            primitive = new PointPrimitive(material) { Area = topArea};
+            primitive.Center.X = centerLT.X;
+            primitive.Center.Y = centerLT.Y;
             primitives.Add(primitive);
             //Right bottom bar
-            primitive = new PointPrimitive(material) { Area = bottomArea, CenterX = centerRB.X, CenterY = centerRB.Y };
+            primitive = new PointPrimitive(material) { Area = bottomArea};
+            primitive.Center.X = centerRB.X;
+            primitive.Center.Y = centerRB.Y;
             primitives.Add(primitive);
             //Left bottom bar
-            primitive = new PointPrimitive(material) { Area = bottomArea, CenterX = centerLB.X, CenterY = centerLB.Y };
+            primitive = new PointPrimitive(material) {Area = bottomArea };
+            primitive.Center.X = centerLB.X;
+            primitive.Center.Y = centerLB.Y;
             primitives.Add(primitive);
             return primitives;
         }
diff --git a/StructureHelperTests/FunctionalTests/Ndms/SteelSections/ReinforcementTest.cs b/StructureHelperTests/FunctionalTests/Ndms/SteelSections/ReinforcementTest.cs
index 792dfb1..bcae722 100644
--- a/StructureHelperTests/FunctionalTests/Ndms/SteelSections/ReinforcementTest.cs
+++ b/StructureHelperTests/FunctionalTests/Ndms/SteelSections/ReinforcementTest.cs
@@ -27,7 +27,7 @@ namespace StructureHelperTests.FunctionalTests.Ndms.SteelSections
             ProgramSetting.NatSystem = NatSystems.EU;
             var headMaterial = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Reinforcement400);
             var options = new TriangulationOptions { LimiteState = LimitStates.ULS, CalcTerm = CalcTerms.ShortTerm };
-            var primitive = new RectanglePrimitive { CenterX = 0, CenterY = 0, Width = width, Height = height, HeadMaterial = headMaterial, NdmMaxSize = 1, NdmMinDivision = 100 };
+            var primitive = new RectanglePrimitive { Width = width, Height = height, HeadMaterial = headMaterial, NdmMaxSize = 1, NdmMinDivision = 100 };
             var primitives = new List<INdmPrimitive>() { primitive};
             var ndmCollection = Triangulation.GetNdms(primitives, options);
             var loaderData = new LoaderOptions
@@ -62,7 +62,7 @@ namespace StructureHelperTests.FunctionalTests.Ndms.SteelSections
             ProgramSetting.NatSystem = NatSystems.EU;
             var headMaterial = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Reinforcement400);
             var options = new TriangulationOptions { LimiteState = LimitStates.ULS, CalcTerm = CalcTerms.ShortTerm };
-            var primitive = new CirclePrimitive { CenterX = 0, CenterY = 0, Diameter = diameter, HeadMaterial = headMaterial, NdmMaxSize = 1, NdmMinDivision = 100 };
+            var primitive = new CirclePrimitive { Diameter = diameter, HeadMaterial = headMaterial, NdmMaxSize = 1, NdmMinDivision = 100 };
             var primitives = new List<INdmPrimitive>() { primitive };
             var ndmCollection = Triangulation.GetNdms(primitives, options);
             var loaderData = new LoaderOptions
diff --git a/StructureHelperTests/UnitTests/Calcuators/FindParameterTest.cs b/StructureHelperTests/UnitTests/Calcuators/FindParameterTest.cs
new file mode 100644
index 0000000..b5c3d49
--- /dev/null
+++ b/StructureHelperTests/UnitTests/Calcuators/FindParameterTest.cs
@@ -0,0 +1,49 @@
+using NUnit.Framework;
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Infrastructures.Settings;
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperLogics.Models.Materials;
+
+namespace StructureHelperTests.UnitTests.Calcuators
+{
+    internal class FindParameterTest
+    {
+        [TestCase(0d, 1d, 0.5d, 0.5d)]
+        [TestCase(0d, 10d, 5d, 5d)]
+        public void Run_ShouldPass_Valid(double startValue, double EndValue, double predicateValue, double expectedValue)
+        {
+            //Arrange
+            var calculator = new FindParameterCalculator()
+            {
+                StartValue = startValue,
+                EndValue = EndValue,
+                Predicate = x => x > predicateValue
+            };
+            //Act
+            calculator.Run();
+            var result = calculator.Result as FindParameterResult;
+            //Assert
+            Assert.NotNull(result);
+            Assert.IsTrue(result.IsValid);
+            Assert.AreEqual(predicateValue, expectedValue, 0.001d);
+        }
+        [TestCase(0d, 1d, 5d, 5d, false)]
+        [TestCase(0d, 10d, 15d, 15d, false)]
+        public void Run_ShouldPass_NotValid(double startValue, double EndValue, double predicateValue, double expectedValue, bool isValid)
+        {
+            //Arrange
+            var calculator = new FindParameterCalculator()
+            {
+                StartValue = startValue,
+                EndValue = EndValue,
+                Predicate = x => x > predicateValue
+            };
+            //Act
+            calculator.Run();
+            var result = calculator.Result as FindParameterResult;
+            //Assert
+            Assert.NotNull(result);
+            Assert.IsTrue(result.IsValid == isValid);
+        }
+    }
+}
diff --git a/StructureHelperTests/UnitTests/MaterialTests/MaterialStrengthTest.cs b/StructureHelperTests/UnitTests/MaterialTests/MaterialStrengthTest.cs
index 2967d0a..9f5078d 100644
--- a/StructureHelperTests/UnitTests/MaterialTests/MaterialStrengthTest.cs
+++ b/StructureHelperTests/UnitTests/MaterialTests/MaterialStrengthTest.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using NUnit.Framework;
+using NUnit.Framework;
 using StructureHelperCommon.Infrastructures.Enums;
 using StructureHelperCommon.Infrastructures.Settings;
 using StructureHelperLogics.Models.Materials;
diff --git a/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs b/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs
index c05fe59..b723d5c 100644
--- a/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs
+++ b/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs
@@ -49,10 +49,12 @@ namespace StructureHelperTests.UnitTests.Ndms.Triangulations
             //Arrange
             ProgramSetting.NatSystem = NatSystems.RU;
             var material = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Concrete40);
-            var mainBlock = new RectanglePrimitive() { CenterX = centerX, CenterY = centerY, Width = width, Height = height, HeadMaterial = material };
+            var mainBlock = new RectanglePrimitive() { Width = width, Height = height, HeadMaterial = material };
+            mainBlock.Center.X = centerX;
+            mainBlock.Center.Y = centerY;
             mainBlock.VisualProperty.ZIndex = 0;
             var opening = new RectanglePrimitive()
-            { CenterX = 0d, CenterY = 0d, Width = 0.3d, Height = 0.2d,
+            { Width = 0.3d, Height = 0.2d,
                 HeadMaterial = material, Triangulate = triangOpening,
                 ClearUnderlying = true};
             opening.VisualProperty.ZIndex = 1;
@@ -75,12 +77,12 @@ namespace StructureHelperTests.UnitTests.Ndms.Triangulations
             //Arrange
             ProgramSetting.NatSystem = NatSystems.RU;
             var material = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Concrete40);
-            var mainBlock = new RectanglePrimitive() { CenterX = centerX, CenterY = centerY, Width = width, Height = height, HeadMaterial = material };
+            var mainBlock = new RectanglePrimitive() {Width = width, Height = height, HeadMaterial = material };
+            mainBlock.Center.X = centerX;
+            mainBlock.Center.Y = centerY;
             mainBlock.VisualProperty.ZIndex = 0;
             var opening = new CirclePrimitive()
             {
-                CenterX = 0d,
-                CenterY = 0d,
                 Diameter = 0.3d,
                 HeadMaterial = material,
                 Triangulate = triangOpening,
@@ -106,12 +108,12 @@ namespace StructureHelperTests.UnitTests.Ndms.Triangulations
             //Arrange
             ProgramSetting.NatSystem = NatSystems.RU;
             var material = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Concrete40);
-            var mainBlock = new CirclePrimitive() { CenterX = centerX, CenterY = centerY, Diameter = diameter, HeadMaterial = material };
+            var mainBlock = new CirclePrimitive() { Diameter = diameter, HeadMaterial = material };
+            mainBlock.Center.X = centerX;
+            mainBlock.Center.Y = centerY;
             mainBlock.VisualProperty.ZIndex = 0;
             var opening = new RectanglePrimitive()
             {
-                CenterX = 0d,
-                CenterY = 0d,
                 Width = 0.3d,
                 Height = 0.2d,
                 HeadMaterial = material,
diff --git a/StructureHelperTests/ViewModelTests/NdmPrimitiveTests.cs b/StructureHelperTests/ViewModelTests/NdmPrimitiveTests.cs
index f06f99b..e2f5277 100644
--- a/StructureHelperTests/ViewModelTests/NdmPrimitiveTests.cs
+++ b/StructureHelperTests/ViewModelTests/NdmPrimitiveTests.cs
@@ -66,7 +66,7 @@ namespace StructureHelperTests.ViewModelTests
             //Arrange
             ProgramSetting.NatSystem = NatSystems.RU;
             var material = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Concrete40);
-            var primitive = new ReinforcementPrimitive() { HeadMaterial = material };
+            var primitive = new RebarPrimitive() { HeadMaterial = material };
             var primitiveBase = new ReinforcementViewPrimitive(primitive);
             //Act
             var vm = new PrimitivePropertiesViewModel(primitiveBase, new CrossSectionRepository());