diff --git a/StructureHelper/Infrastructure/UI/Converters/Units/PlainDouble.cs b/StructureHelper/Infrastructure/UI/Converters/Units/PlainDouble.cs
index 6ab470e..44fa13d 100644
--- a/StructureHelper/Infrastructure/UI/Converters/Units/PlainDouble.cs
+++ b/StructureHelper/Infrastructure/UI/Converters/Units/PlainDouble.cs
@@ -1,5 +1,6 @@
 using StructureHelperCommon.Infrastructures.Exceptions;
 using StructureHelperCommon.Infrastructures.Strings;
+using StructureHelperCommon.Services.Units;
 using System;
 using System.Collections.Generic;
 using System.Globalization;
diff --git a/StructureHelper/Libraries/LoaderCalculator.dll b/StructureHelper/Libraries/LoaderCalculator.dll
index 5dff10f..9a7406a 100644
Binary files a/StructureHelper/Libraries/LoaderCalculator.dll and b/StructureHelper/Libraries/LoaderCalculator.dll differ
diff --git a/StructureHelper/StructureHelper.csproj.user b/StructureHelper/StructureHelper.csproj.user
index afb63e6..7866b62 100644
--- a/StructureHelper/StructureHelper.csproj.user
+++ b/StructureHelper/StructureHelper.csproj.user
@@ -9,6 +9,9 @@
     </ApplicationDefinition>
   </ItemGroup>
   <ItemGroup>
+    <Compile Update="Windows\CalculationWindows\CalculatorsViews\GeometryCalculator\GeometryCalculatorResultView.xaml.cs">
+      <SubType>Code</SubType>
+    </Compile>
     <Compile Update="Windows\Errors\ErrorMessage.xaml.cs">
       <SubType>Code</SubType>
     </Compile>
@@ -35,6 +38,9 @@
     <Page Update="Infrastructure\UI\Resources\Materials.xaml">
       <SubType>Designer</SubType>
     </Page>
+    <Page Update="Windows\CalculationWindows\CalculatorsViews\GeometryCalculator\GeometryCalculatorResultView.xaml">
+      <SubType>Designer</SubType>
+    </Page>
     <Page Update="Windows\Errors\ErrorMessage.xaml">
       <SubType>Designer</SubType>
     </Page>
diff --git a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
index 3a64d02..48ab589 100644
--- a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
+++ b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
@@ -35,7 +35,7 @@
                 <DataGridTextColumn Header="EpsZ" Width="90" Binding="{Binding LoaderResults.ForceStrainPair.StrainMatrix.EpsZ}"/>
                 <DataGridTextColumn Header="Accuracy" Width="90" Binding="{Binding LoaderResults.AccuracyRate}"/>
                 <DataGridTextColumn Header="Max Iteration" Width="90" Binding="{Binding LoaderResults.IterationCounter}"/>
-                <DataGridTextColumn Header="Description" Width="300" Binding="{Binding Desctription}"/>
+                <DataGridTextColumn Header="Description" Width="300" Binding="{Binding Description}"/>
             </DataGrid.Columns>
         </DataGrid>
         <StackPanel Grid.Column="1">
@@ -44,6 +44,7 @@
             <Button Margin="3" Content="Export" ToolTip="Export results to *.csv" Command="{Binding ExportToCSVCommand}"/>
             <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}"/>
         </StackPanel>
     </Grid>
 </Window>
diff --git a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml
new file mode 100644
index 0000000..405e059
--- /dev/null
+++ b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml
@@ -0,0 +1,32 @@
+<Window x:Class="StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCalculator.GeometryCalculatorResultView"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCalculator"
+        xmlns:vm="clr-namespace:StructureHelper.Windows.ViewModels.Calculations.Calculators.GeometryCalculator"
+        mc:Ignorable="d"
+        d:DataContext="{d:DesignInstance vm:GeometryCalculatorResultViewModel}"
+        Title="Geometry Properies" Height="450" Width="850" WindowStartupLocation="CenterScreen">
+    <Grid>
+        <DataGrid x:Name="ResultGrid" IsReadOnly="True" AutoGenerateColumns="False" ItemsSource="{Binding TextParameters}">
+            <DataGrid.RowStyle>
+                <Style TargetType="DataGridRow">
+                    <Style.Triggers>
+                        <DataTrigger Binding="{Binding IsValid}" Value="false">
+                            <Setter Property="Background" Value="Pink"/>
+                        </DataTrigger>
+                    </Style.Triggers>
+                </Style>
+            </DataGrid.RowStyle>
+            <DataGrid.Columns>
+                <DataGridCheckBoxColumn Header="Valid" Binding="{Binding Path=IsValid}"/>
+                <DataGridTextColumn Header="Name" Width="100" Binding="{Binding Name}"/>
+                <DataGridTextColumn Header="Short" Width="50" Binding="{Binding ShortName}"/>
+                <DataGridTextColumn Header="Unit" Width="100" Binding="{Binding MeasurementUnit}"/>
+                <DataGridTextColumn Header="Value" Width="150" Binding="{Binding Value}"/>
+                <DataGridTextColumn Header="Description" Width="400" Binding="{Binding Description}"/>
+            </DataGrid.Columns>
+        </DataGrid>
+    </Grid>
+</Window>
diff --git a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml.cs b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml.cs
new file mode 100644
index 0000000..af55770
--- /dev/null
+++ b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml.cs
@@ -0,0 +1,32 @@
+using StructureHelper.Windows.ViewModels.Calculations.Calculators.GeometryCalculator;
+using StructureHelperCommon.Models.Parameters;
+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;
+
+namespace StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCalculator
+{
+    /// <summary>
+    /// Логика взаимодействия для GeometryCalculatorResultView.xaml
+    /// </summary>
+    public partial class GeometryCalculatorResultView : Window
+    {
+        GeometryCalculatorResultViewModel viewModel;
+        public GeometryCalculatorResultView(List<ITextParameter> textParameters)
+        {
+            viewModel = new GeometryCalculatorResultViewModel(textParameters);
+            InitializeComponent();
+            this.DataContext = viewModel;
+        }
+    }
+}
diff --git a/StructureHelper/Windows/MainWindow/MainView.xaml b/StructureHelper/Windows/MainWindow/MainView.xaml
index d89a968..870af97 100644
--- a/StructureHelper/Windows/MainWindow/MainView.xaml
+++ b/StructureHelper/Windows/MainWindow/MainView.xaml
@@ -98,13 +98,25 @@
                             </ListBox.ItemTemplate>
                         </ListBox>
                     </Expander>
-                    <Expander Header="Materials" MinWidth="20">
+                    <Expander Header="Materials" MinWidth="20" DataContext="{Binding MaterialsLogic}">
                         <Expander.ContextMenu>
                             <ContextMenu>
-                                <Button Content="Materials" Command="{Binding EditHeadMaterialsCommand}"/>
+                                <Button Content="Materials" Command="{Binding EditMaterialsCommand}"/>
+                                <MenuItem Header="Add">
+                                    <Button Content="Concrete" Command="{Binding Add}" CommandParameter="{x:Static enums:MaterialType.Concrete}"/>
+                                    <Button Content="Reinforcement" Command="{Binding Add}" CommandParameter="{x:Static enums:MaterialType.Reinforcement}"/>
+                                    <Button Content="Elastic" Command="{Binding Add}" CommandParameter="{x:Static enums:MaterialType.Elastic}"/>
+                                </MenuItem>
                             </ContextMenu>
                         </Expander.ContextMenu>
-                        <ListBox ItemsSource="{Binding HeadMaterials}"  ItemTemplate="{StaticResource ColoredItemTemplate}">
+                        <ListBox ItemsSource="{Binding Items}"  SelectedItem="{Binding SelectedItem}" ItemTemplate="{StaticResource ColoredItemTemplate}">
+                            <ListBox.ContextMenu>
+                                <ContextMenu>
+                                    <Button Content="Edit" Command="{Binding Edit}"/>
+                                    <Button Content="Copy" Command="{Binding Copy}"/>
+                                    <Button Content="Delete" Command="{Binding Delete}"/>
+                                </ContextMenu>
+                            </ListBox.ContextMenu>
                         </ListBox>
                     </Expander>
                     <Expander Header="Geometry" MinWidth="20" DataContext="{Binding PrimitiveLogic}">
diff --git a/StructureHelper/Windows/MainWindow/MainViewModel.cs b/StructureHelper/Windows/MainWindow/MainViewModel.cs
index 40592e0..405cb00 100644
--- a/StructureHelper/Windows/MainWindow/MainViewModel.cs
+++ b/StructureHelper/Windows/MainWindow/MainViewModel.cs
@@ -6,7 +6,9 @@ using StructureHelper.Windows.ColorPickerWindow;
 using StructureHelper.Windows.MainWindow.Materials;
 using StructureHelper.Windows.PrimitiveTemplates.RCs.Beams;
 using StructureHelper.Windows.PrimitiveTemplates.RCs.RectangleBeam;
+using StructureHelper.Windows.ViewModels;
 using StructureHelper.Windows.ViewModels.Forces;
+using StructureHelper.Windows.ViewModels.Materials;
 using StructureHelper.Windows.ViewModels.NdmCrossSections;
 using StructureHelperCommon.Infrastructures.Enums;
 using StructureHelperCommon.Infrastructures.Exceptions;
@@ -40,6 +42,7 @@ namespace StructureHelper.Windows.MainWindow
         private readonly AnalysisVewModelLogic calculatorsLogic;
         public AnalysisVewModelLogic CalculatorsLogic { get => calculatorsLogic;}
         public ActionsViewModel CombinationsLogic { get => combinationsLogic; }
+        public MaterialsViewModel MaterialsLogic { get => materialsLogic; }
         public PrimitiveViewModelLogic PrimitiveLogic => primitiveLogic;
         public HelpLogic HelpLogic => new HelpLogic();
 
@@ -153,11 +156,13 @@ namespace StructureHelper.Windows.MainWindow
         public ICommand EditCalculationPropertyCommand { get; }
         public ICommand EditHeadMaterialsCommand { get; }
         public ICommand AddRCCircleCase
-        { get
+        { 
+            get
             {
                 return new RelayCommand(o =>
                 {
                     PrimitiveLogic.AddItems(GetRCCirclePrimitives());
+                    materialsLogic.Refresh();
                 });
             }
         }
@@ -215,6 +220,7 @@ namespace StructureHelper.Windows.MainWindow
         private PrimitiveViewModelLogic primitiveLogic;
         private RelayCommand showVisualProperty;
         private RelayCommand selectPrimitive;
+        private MaterialsViewModel materialsLogic;
 
         public MainViewModel(MainModel model)
         {
@@ -222,6 +228,8 @@ namespace StructureHelper.Windows.MainWindow
             Model = model;
             section = model.Section;
             combinationsLogic = new ActionsViewModel(repository);
+            materialsLogic = new MaterialsViewModel(repository);
+            materialsLogic.AfterItemsEdit += afterMaterialEdit;
             calculatorsLogic = new AnalysisVewModelLogic(repository);
             primitiveLogic = new PrimitiveViewModelLogic(section) { CanvasWidth = CanvasWidth, CanvasHeight = CanvasHeight };
             XX2 = CanvasWidth;
@@ -253,7 +261,6 @@ namespace StructureHelper.Windows.MainWindow
                         rect.PrimitiveHeight = PanelY - rect.PrimitiveTop + 10d;
                 }
             });
-            EditHeadMaterialsCommand = new RelayCommand(o => EditHeadMaterials());
 
             SetColor = new RelayCommand(o =>
             {
@@ -279,16 +286,19 @@ namespace StructureHelper.Windows.MainWindow
             AddBeamCase = new RelayCommand(o =>
             {
                 PrimitiveLogic.AddItems(GetBeamCasePrimitives());
+                materialsLogic.Refresh();
             });
 
             AddColumnCase = new RelayCommand(o =>
             {
                 PrimitiveLogic.AddItems(GetColumnCasePrimitives());
+                materialsLogic.Refresh();
             });
 
             AddSlabCase = new RelayCommand(o =>
             {
                 PrimitiveLogic.AddItems(GetSlabCasePrimitives());
+                materialsLogic.Refresh();
             });
 
             MovePrimitiveToGravityCenterCommand = new RelayCommand(o =>
@@ -318,11 +328,8 @@ namespace StructureHelper.Windows.MainWindow
             });
         }
 
-        private void EditHeadMaterials()
+        private void afterMaterialEdit(CRUDViewModelBase<IHeadMaterial> sender, CRUDVMEventArgs e)
         {
-            var wnd = new HeadMaterialsView(repository);
-            wnd.ShowDialog();
-            OnPropertyChanged(nameof(HeadMaterials));
             foreach (var primitive in primitiveLogic.Items)
             {
                 primitive.RefreshColor();
diff --git a/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml b/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml
index bb0e453..7304067 100644
--- a/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml
+++ b/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml
@@ -10,10 +10,16 @@
         Title="Select Primitives" Height="250" Width="250" WindowStartupLocation="CenterScreen" ResizeMode="NoResize">
     <Grid>
         <Grid.RowDefinitions>
+            <RowDefinition Height="25"/>
             <RowDefinition Height="*"/>
             <RowDefinition Height="35"/>
         </Grid.RowDefinitions>
-        <ListBox ItemsSource="{Binding Items.CollectionItems}" SelectedItem="Items.SelectedItem">
+        <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
+            <Button Content="Select All" Command="{Binding Items.SelectAllCommand}"/>
+            <Button Content="Unselect All" Command="{Binding Items.UnSelectAllCommand}"/>
+            <Button Content="Invert Selection" Command="{Binding Items.InvertSelectionCommand}"/>
+        </StackPanel>
+        <ListBox Grid.Row="1" ItemsSource="{Binding Items.CollectionItems}" SelectedItem="Items.SelectedItem">
             <ListBox.ItemTemplate>
                 <DataTemplate>
                     <Grid>
@@ -27,7 +33,7 @@
                 </DataTemplate>
             </ListBox.ItemTemplate>
         </ListBox>
-        <StackPanel Grid.Row="1" Orientation="Horizontal" HorizontalAlignment="Right">
+        <StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Right">
             <Button Style="{StaticResource CancelButton}"/>
             <Button Style="{StaticResource OkButton}" Click="Button_Click"/>
         </StackPanel>
diff --git a/StructureHelper/Windows/ViewModels/CRUDVMEventArgs.cs b/StructureHelper/Windows/ViewModels/CRUDVMEventArgs.cs
new file mode 100644
index 0000000..fad6144
--- /dev/null
+++ b/StructureHelper/Windows/ViewModels/CRUDVMEventArgs.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Windows.ViewModels
+{
+    public class CRUDVMEventArgs
+    {
+    }
+}
diff --git a/StructureHelper/Windows/ViewModels/CRUDViewModelBase.cs b/StructureHelper/Windows/ViewModels/CRUDViewModelBase.cs
index da745d7..3f42aeb 100644
--- a/StructureHelper/Windows/ViewModels/CRUDViewModelBase.cs
+++ b/StructureHelper/Windows/ViewModels/CRUDViewModelBase.cs
@@ -1,4 +1,5 @@
-using StructureHelper.Infrastructure;
+using Microsoft.VisualBasic;
+using StructureHelper.Infrastructure;
 using StructureHelperCommon.Models.Materials.Libraries;
 using System;
 using System.Collections.Generic;
@@ -13,7 +14,6 @@ namespace StructureHelper.Windows.ViewModels
 {
     public abstract class CRUDViewModelBase<TItem> : ViewModelBase, ICRUDViewModel<TItem> where TItem : class
     {
-
         private ICommand addCommand;
         private ICommand deleteCommand;
         private ICommand copyCommand;
@@ -83,6 +83,7 @@ namespace StructureHelper.Windows.ViewModels
                 Items.Add(item);
             }
             OnPropertyChanged(nameof(Items));
+            AfterItemsEdit?.Invoke(this, new CRUDVMEventArgs());
         }
 
         public ICommand Copy
@@ -113,15 +114,19 @@ namespace StructureHelper.Windows.ViewModels
                 Items.Add(item);
             }
         }
-        public CRUDViewModelBase()
-        {
-            Items = new ObservableCollection<TItem>();
-        }
 
         public CRUDViewModelBase(List<TItem> collection)
         {
             Collection = collection;
-            Items = new ObservableCollection<TItem>(collection);
+            Refresh();
         }
+        public void Refresh()
+        {
+            Items = new ObservableCollection<TItem>(Collection);
+            OnPropertyChanged(nameof(Items));
+            AfterItemsEdit?.Invoke(this, new CRUDVMEventArgs());
+        }
+        public delegate void CRUDHandler(CRUDViewModelBase<TItem> sender, CRUDVMEventArgs e);
+        public event CRUDHandler? AfterItemsEdit;
     }
 }
diff --git a/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs b/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
index c26772e..3f6990c 100644
--- a/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
@@ -7,6 +7,7 @@ using StructureHelper.Services.Reports.CalculationReports;
 using StructureHelper.Services.ResultViewers;
 using StructureHelper.Windows.CalculationWindows.CalculatorsViews;
 using StructureHelper.Windows.CalculationWindows.CalculatorsViews.ForceCalculatorViews;
+using StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCalculator;
 using StructureHelper.Windows.Errors;
 using StructureHelper.Windows.Forces;
 using StructureHelper.Windows.PrimitivePropertiesWindow;
@@ -50,6 +51,7 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
         private RelayCommand interpolateCommand;
         private RelayCommand setPrestrainCommand;
         private ICommand showAnchorageCommand;
+        private ICommand showGeometryResultCommand;
 
         public IForcesResults ForcesResults
         {
@@ -63,13 +65,8 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
                 return showIsoFieldCommand ??
                 (showIsoFieldCommand = new RelayCommand(o =>
                 {
-                    var vm = new SelectPrimitivesViewModel(ndmPrimitives);
-                    var wnd = new SelectPrimitivesView(vm);
-                    wnd.ShowDialog();
-                    if (wnd.DialogResult == true)
+                    if (SelectPrimitives() == true)
                     {
-                        selectedNdmPrimitives = vm.Items.CollectionItems.Where(x => x.IsSelected == true).Select(x => x.Item.GetNdmPrimitive());
-                        GetNdms();
                         ShowIsoField();
                     }
                 }, o => (SelectedResult != null) && SelectedResult.IsValid));
@@ -169,7 +166,7 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
             var result = calculator.Result;
             if (result is null || result.IsValid == false)
             {
-                MessageBox.Show(result.Desctription, "Check data for analisys", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+                MessageBox.Show(result.Description, "Check data for analisys", MessageBoxButtons.OK, MessageBoxIcon.Warning);
             }
             else
             {
@@ -215,11 +212,10 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
                     (showAnchorageCommand = new RelayCommand(o =>
                     {
                         showAnchorage();
-                    }, o => SelectedResult != null
+                    }, o => SelectedResult != null && SelectedResult.IsValid
                     ));
             }
         }
-
         private void showAnchorage()
         {
             try
@@ -239,7 +235,33 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
                     DetailText = $"{ex}"};
                 new ErrorMessage(vm).ShowDialog();
             }
+        }
 
+        public ICommand ShowGeometryResultCommand =>
+            showGeometryResultCommand ??= new RelayCommand(o =>
+            showGeometryResult(), o => SelectedResult != null && SelectedResult.IsValid);
+        private void showGeometryResult()
+        {
+            if (SelectPrimitives() == true)
+            {
+                try
+                {
+                    var strainMatrix = SelectedResult.LoaderResults.ForceStrainPair.StrainMatrix;
+                    var textParametrsLogic = new TextParametersLogic(ndms, strainMatrix);
+                    var textParameters = textParametrsLogic.GetTextParameters();
+                    var wnd = new GeometryCalculatorResultView(textParameters);
+                    wnd.ShowDialog();
+                }
+                catch (Exception ex)
+                {
+                    var vm = new ErrorProcessor()
+                    {
+                        ShortText = "Errors apearred during showing isofield, see detailed information",
+                        DetailText = $"{ex}"
+                    };
+                    new ErrorMessage(vm).ShowDialog();
+                }
+            }
         }
 
         public ForcesResultsViewModel(IForceCalculator forceCalculator)
@@ -269,7 +291,6 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
             }
 
         }
-
         private void GetNdms()
         {
             var limitState = SelectedResult.DesignForceTuple.LimitState;
@@ -293,5 +314,19 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
             }
             ndms = ndmRange;
         }
+
+        private bool SelectPrimitives()
+        {
+            var vm = new SelectPrimitivesViewModel(ndmPrimitives);
+            var wnd = new SelectPrimitivesView(vm);
+            wnd.ShowDialog();
+            if (wnd.DialogResult == true)
+            {
+                selectedNdmPrimitives = vm.Items.CollectionItems.Where(x => x.IsSelected == true).Select(x => x.Item.GetNdmPrimitive());
+                GetNdms();
+                return true;
+            }
+            return false;
+        }
     }
 }
diff --git a/StructureHelper/Windows/ViewModels/Calculations/Calculators/GeometryCalculator/GeometryCalculatorResultViewModel.cs b/StructureHelper/Windows/ViewModels/Calculations/Calculators/GeometryCalculator/GeometryCalculatorResultViewModel.cs
new file mode 100644
index 0000000..1c51511
--- /dev/null
+++ b/StructureHelper/Windows/ViewModels/Calculations/Calculators/GeometryCalculator/GeometryCalculatorResultViewModel.cs
@@ -0,0 +1,24 @@
+using StructureHelper.Infrastructure;
+using StructureHelperCommon.Models.Parameters;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Windows.ViewModels.Calculations.Calculators.GeometryCalculator
+{
+    internal class GeometryCalculatorResultViewModel : ViewModelBase
+    {
+        private List<ITextParameter> textParameters;
+
+        public List<ITextParameter> TextParameters
+        { get => textParameters;
+            
+        }
+        public GeometryCalculatorResultViewModel(List<ITextParameter> textParameters)
+        {
+            this.textParameters = textParameters;
+        }
+    }
+}
diff --git a/StructureHelper/Windows/ViewModels/Materials/MaterialsViewModel.cs b/StructureHelper/Windows/ViewModels/Materials/MaterialsViewModel.cs
index d1eb9bd..f4619eb 100644
--- a/StructureHelper/Windows/ViewModels/Materials/MaterialsViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/Materials/MaterialsViewModel.cs
@@ -6,16 +6,40 @@ using StructureHelperCommon.Infrastructures.Settings;
 using StructureHelperCommon.Infrastructures.Strings;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperLogics.Models.Materials;
+using StructureHelperLogics.NdmCalculations.Primitives;
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using static System.Windows.Forms.VisualStyles.VisualStyleElement.TextBox;
+using System.Windows.Forms;
+using StructureHelperLogics.Models.CrossSections;
+using StructureHelper.Infrastructure;
+using System.Windows.Input;
 
 namespace StructureHelper.Windows.ViewModels.Materials
 {
-    internal class MaterialsViewModel : CRUDViewModelBase<IHeadMaterial>
+    public class MaterialsViewModel : CRUDViewModelBase<IHeadMaterial>
     {
+        ICrossSectionRepository repository;
+        private ICommand editMaterialsCommand;
+
+        public ICommand EditMaterialsCommand
+        {
+            get
+            {
+                return editMaterialsCommand ??
+                    (
+                    editMaterialsCommand = new RelayCommand(o => EditHeadMaterials())
+                    );
+            }
+            
+        }
+        public MaterialsViewModel(ICrossSectionRepository repository) : base(repository.HeadMaterials)
+        {
+            this.repository = repository;
+        }
         public override void AddMethod(object parameter)
         {
             CheckParameters(parameter);
@@ -28,9 +52,19 @@ namespace StructureHelper.Windows.ViewModels.Materials
         }
         public override void DeleteMethod(object parameter)
         {
-#error
-            //to do delete method
-            base.DeleteMethod(parameter);
+            var primitives = repository.Primitives;
+            var primitivesWithMaterial = primitives.Where(x => x.HeadMaterial == SelectedItem);
+            int primitivesCount = primitivesWithMaterial.Count();
+            if (primitivesCount > 0)
+            {
+                MessageBox.Show("Some primitives reference to this material", "Material can not be deleted", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+                return;
+            }
+            var dialogResult = MessageBox.Show("Delete material?", "Please, confirm deleting", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
+            if (dialogResult == DialogResult.Yes)
+            {
+                base.DeleteMethod(parameter);
+            }
         }
         public override void EditMethod(object parameter)
         {
@@ -38,7 +72,6 @@ namespace StructureHelper.Windows.ViewModels.Materials
             wnd.ShowDialog();
             base.EditMethod(parameter);
         }
-
         private void AddElastic()
         {
             var material = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Elastic200, ProgramSetting.CodeType);
@@ -62,5 +95,11 @@ namespace StructureHelper.Windows.ViewModels.Materials
             if (parameter is null) { throw new StructureHelperException(ErrorStrings.ParameterIsNull); }
             if (parameter is not MaterialType) { throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknown + $". Expected: {typeof(MaterialType)} . Actual type: {nameof(parameter)}"); }
         }
+        private void EditHeadMaterials()
+        {
+            var wnd = new HeadMaterialsView(repository);
+            wnd.ShowDialog();
+            Refresh();
+        }
     }
 }
diff --git a/StructureHelper/Windows/ViewModels/NdmCrossSections/AnalysisVewModelLogic.cs b/StructureHelper/Windows/ViewModels/NdmCrossSections/AnalysisVewModelLogic.cs
index 14a51b6..24955fe 100644
--- a/StructureHelper/Windows/ViewModels/NdmCrossSections/AnalysisVewModelLogic.cs
+++ b/StructureHelper/Windows/ViewModels/NdmCrossSections/AnalysisVewModelLogic.cs
@@ -59,7 +59,7 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
                         var result = SelectedItem.Result;
                         if (result.IsValid == false)
                         {
-                            MessageBox.Show(result.Desctription, "Check data for analisys", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+                            MessageBox.Show(result.Description, "Check data for analisys", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                         }
                         else
                         {
diff --git a/StructureHelper/Windows/ViewModels/SelectItemsViewModel.cs b/StructureHelper/Windows/ViewModels/SelectItemsViewModel.cs
index 540029d..86ca977 100644
--- a/StructureHelper/Windows/ViewModels/SelectItemsViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/SelectItemsViewModel.cs
@@ -1,19 +1,37 @@
-using System;
+using StructureHelper.Infrastructure;
+using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Input;
 
 namespace StructureHelper.Windows.ViewModels
 {
-    public class SelectItemsViewModel<TItem>
+    public class SelectItemsViewModel<TItem> : ViewModelBase
         where TItem : class
     {
-        public class CollectionItem
+        private ICommand? selectAllCommand;
+        private ICommand? unSelectAllCommand;
+        private ICommand? invertSelectionCommand;
+
+        public class CollectionItem : ViewModelBase
         {
-            public bool IsSelected { get; set; }
+            bool isSelected;
+            public bool IsSelected
+            {
+                get
+                {
+                    return isSelected;
+                }
+                set
+                {
+                    isSelected = value;
+                    OnPropertyChanged(nameof(IsSelected));
+                }
+            }
             public TItem Item { get; set; }
         }
 
@@ -21,6 +39,45 @@ namespace StructureHelper.Windows.ViewModels
 
         public ObservableCollection<CollectionItem> CollectionItems { get; }
 
+        public ICommand SelectAllCommand
+        {
+            get
+            {
+                return selectAllCommand ??= new RelayCommand(o => setIsSelected(true));
+            }
+        }
+
+        public ICommand UnSelectAllCommand
+        {
+            get
+            {
+                return unSelectAllCommand ??= new RelayCommand(o => setIsSelected(false));
+            }
+        }
+
+        public ICommand InvertSelectionCommand
+        {
+            get
+            {
+                return invertSelectionCommand ??= new RelayCommand(o =>
+                    {
+                        foreach (var item in CollectionItems)
+                        {
+                            item.IsSelected = !item.IsSelected;
+                        }
+                    }
+                    );
+            }
+        }
+
+        private void setIsSelected(bool isSelected)
+        {
+            foreach (var item in CollectionItems)
+            {
+                item.IsSelected = isSelected;
+            }
+        }
+
         public SelectItemsViewModel(IEnumerable<TItem> items)
         {
             CollectionItems = new ObservableCollection<CollectionItem>();
diff --git a/StructureHelperCommon/Infrastructures/Settings/CrossSectionAxisNames.cs b/StructureHelperCommon/Infrastructures/Settings/CrossSectionAxisNames.cs
new file mode 100644
index 0000000..04e32ab
--- /dev/null
+++ b/StructureHelperCommon/Infrastructures/Settings/CrossSectionAxisNames.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Infrastructures.Settings
+{
+    public class CrossSectionAxisNames
+    {
+        public string FirstAxis => "x";
+        public string SecondAxis => "y";
+        public string ThirdAxis => "z";
+    }}
diff --git a/StructureHelperCommon/Infrastructures/Settings/ProgramSetting.cs b/StructureHelperCommon/Infrastructures/Settings/ProgramSetting.cs
index 03254af..83751c3 100644
--- a/StructureHelperCommon/Infrastructures/Settings/ProgramSetting.cs
+++ b/StructureHelperCommon/Infrastructures/Settings/ProgramSetting.cs
@@ -1,9 +1,11 @@
 using StructureHelperCommon.Infrastructures.Enums;
+using System.Windows.Navigation;
 
 namespace StructureHelperCommon.Infrastructures.Settings
 {
     public static class ProgramSetting
     {
         public static CodeTypes CodeType => CodeTypes.SP63_13330_2018;
+        public static CrossSectionAxisNames CrossSectionAxisNames => new CrossSectionAxisNames();
     }
 }
diff --git a/StructureHelperCommon/Models/Parameters/ITextParameter.cs b/StructureHelperCommon/Models/Parameters/ITextParameter.cs
new file mode 100644
index 0000000..d315eb8
--- /dev/null
+++ b/StructureHelperCommon/Models/Parameters/ITextParameter.cs
@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Parameters
+{
+    public interface ITextParameter
+    {
+        bool IsValid { get; set; }
+        string Name { get; set; }
+        string ShortName { get; set; }
+        string MeasurementUnit { get; set; }
+        double Value { get; set; }
+        string Description { get; set; }
+    }
+}
diff --git a/StructureHelperCommon/Models/Parameters/TextParameter.cs b/StructureHelperCommon/Models/Parameters/TextParameter.cs
new file mode 100644
index 0000000..10512fb
--- /dev/null
+++ b/StructureHelperCommon/Models/Parameters/TextParameter.cs
@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Parameters
+{
+    public class TextParameter : ITextParameter
+    {
+        public bool IsValid { get; set; }
+        public string Name { get; set; }
+        public string ShortName { get; set; }
+        public string MeasurementUnit { get; set; }
+        public double Value { get; set; }
+        public string Description { get; set; }
+    }
+}
diff --git a/StructureHelper/Infrastructure/UI/Converters/CommonOperation.cs b/StructureHelperCommon/Services/Units/CommonOperation.cs
similarity index 92%
rename from StructureHelper/Infrastructure/UI/Converters/CommonOperation.cs
rename to StructureHelperCommon/Services/Units/CommonOperation.cs
index ccad02e..fe7bb6b 100644
--- a/StructureHelper/Infrastructure/UI/Converters/CommonOperation.cs
+++ b/StructureHelperCommon/Services/Units/CommonOperation.cs
@@ -1,6 +1,4 @@
-using Newtonsoft.Json.Linq;
-using StructureHelper.Infrastructure.UI.Converters.Units;
-using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Infrastructures.Enums;
 using StructureHelperCommon.Infrastructures.Exceptions;
 using StructureHelperCommon.Infrastructures.Strings;
 using StructureHelperCommon.Services.Units;
@@ -8,13 +6,11 @@ using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
-using System.Text;
 using System.Text.RegularExpressions;
-using System.Threading.Tasks;
 
-namespace StructureHelper.Infrastructure.UI.Converters
+namespace StructureHelperCommon.Services.Units
 {
-    internal static class CommonOperation
+    public static class CommonOperation
     {
         private static IEnumerable<IUnit> units = UnitsFactory.GetUnitCollection();
 
diff --git a/StructureHelper/Infrastructure/UI/Converters/IStringDoublePair.cs b/StructureHelperCommon/Services/Units/IStringDoublePair.cs
similarity index 67%
rename from StructureHelper/Infrastructure/UI/Converters/IStringDoublePair.cs
rename to StructureHelperCommon/Services/Units/IStringDoublePair.cs
index 83de3b6..6856098 100644
--- a/StructureHelper/Infrastructure/UI/Converters/IStringDoublePair.cs
+++ b/StructureHelperCommon/Services/Units/IStringDoublePair.cs
@@ -4,9 +4,9 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace StructureHelper.Infrastructure.UI.Converters
+namespace StructureHelperCommon.Services.Units
 {
-    internal interface IStringDoublePair
+    public interface IStringDoublePair
     {
         double Digit { get; }
         string Text { get; }
diff --git a/StructureHelper/Infrastructure/UI/Converters/StringDoublePair.cs b/StructureHelperCommon/Services/Units/StringDoublePair.cs
similarity index 83%
rename from StructureHelper/Infrastructure/UI/Converters/StringDoublePair.cs
rename to StructureHelperCommon/Services/Units/StringDoublePair.cs
index 37ed79e..7e2cb34 100644
--- a/StructureHelper/Infrastructure/UI/Converters/StringDoublePair.cs
+++ b/StructureHelperCommon/Services/Units/StringDoublePair.cs
@@ -4,7 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace StructureHelper.Infrastructure.UI.Converters
+namespace StructureHelperCommon.Services.Units
 {
     internal class StringDoublePair : IStringDoublePair
     {
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
index 93fc3c6..be5f093 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
@@ -36,7 +36,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
             var checkResult = CheckInputData();
             if (checkResult != "")
             {
-                Result = new ForcesResults() { IsValid = false, Desctription = checkResult };
+                Result = new ForcesResults() { IsValid = false, Description = checkResult };
                 return;
             }
             else
@@ -86,7 +86,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
                                 if (bucklingResult.IsValid != true)
                                 {
                                     result.IsValid = false;
-                                    result.Desctription += $"Buckling result:\n{bucklingResult.Desctription}\n";
+                                    result.Description += $"Buckling result:\n{bucklingResult.Description}\n";
                                 }
                                 newTuple = CalculateBuckling(newTuple, bucklingResult);
                                 result = GetPrimitiveStrainMatrix(ndms, newTuple);
@@ -94,7 +94,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
                             catch (Exception ex)
                             {
                                 result.IsValid = false;
-                                result.Desctription = $"Buckling error:\n{ex}\n";
+                                result.Description = $"Buckling error:\n{ex}\n";
                             }
                         }
                         result.DesignForceTuple.LimitState = limitState;
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceTupleCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceTupleCalculator.cs
index 47988e8..68a2a0a 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceTupleCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceTupleCalculator.cs
@@ -57,19 +57,19 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
                 var calcResult = calculator.Result;
                 if (calcResult.AccuracyRate <= accuracy.IterationAccuracy)
                 {
-                    return new ForcesTupleResult() { IsValid = true, Desctription = "Analysis is done succsefully", LoaderResults = calcResult };
+                    return new ForcesTupleResult() { IsValid = true, Description = "Analysis is done succsefully", LoaderResults = calcResult };
                 }
                 else
                 {
-                    return new ForcesTupleResult() { IsValid = false, Desctription = "Required accuracy rate has not achived", LoaderResults = calcResult };
+                    return new ForcesTupleResult() { IsValid = false, Description = "Required accuracy rate has not achived", LoaderResults = calcResult };
                 }
 
             }
             catch (Exception ex)
             {
                 var result = new ForcesTupleResult() { IsValid = false };
-                if (ex.Message == "Calculation result is not valid: stiffness matrix is equal to zero") { result.Desctription = "Stiffness matrix is equal to zero \nProbably section was collapsed"; }
-                else { result.Desctription = $"Error is appeared due to analysis. Error: {ex}"; }
+                if (ex.Message == "Calculation result is not valid: stiffness matrix is equal to zero") { result.Description = "Stiffness matrix is equal to zero \nProbably section was collapsed"; }
+                else { result.Description = $"Error is appeared due to analysis. Error: {ex}"; }
                 return result;
             }
         }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForcesResults.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForcesResults.cs
index 75fd467..b7dcde8 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForcesResults.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForcesResults.cs
@@ -10,7 +10,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
     {
         public bool IsValid { get; set; }
         public List<IForcesTupleResult> ForcesResultList { get; }
-        public string Desctription { get; set; }
+        public string Description { get; set; }
 
         public ForcesResults()
         {
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForcesTupleResult.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForcesTupleResult.cs
index 7de59dc..8c0fba2 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForcesTupleResult.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForcesTupleResult.cs
@@ -16,7 +16,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
         /// <summary>
         /// Text of result of calculations
         /// </summary>
-        public string Desctription { get; set; }
+        public string Description { get; set; }
         /// <summary>
         /// Keep result of calculations from ndm-library
         /// </summary>
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesResults.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesResults.cs
index e0f5ddd..77548d6 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesResults.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForcesResults.cs
@@ -4,7 +4,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 {
     public interface IForcesResults : INdmResult
     {
-        string Desctription { get; set; }
+        string Description { get; set; }
         List<IForcesTupleResult> ForcesResultList { get; }
         bool IsValid { get; set; }
     }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/INdmResult.cs b/StructureHelperLogics/NdmCalculations/Analyses/INdmResult.cs
index 878b31d..137a624 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/INdmResult.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/INdmResult.cs
@@ -12,6 +12,6 @@ namespace StructureHelperLogics.NdmCalculations.Analyses
         /// True if result of calculation is valid
         /// </summary>
         bool IsValid { get; set; }
-        string Desctription { get; set; }
+        string Description { get; set; }
     }
 }
diff --git a/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingCalculator.cs b/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingCalculator.cs
index 52f79ca..0a03ff7 100644
--- a/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingCalculator.cs
@@ -31,7 +31,7 @@ namespace StructureHelperLogics.NdmCalculations.Buckling
         private (double EtaAlongX, double EtaAlongY) GetBucklingCoefficients()
         {
             var stiffness = GetStiffness();
-            criticalForceLogic.LongForce = options.CalcForceTuple.Nz;
+            criticalForceLogic.LongitudinalForce = options.CalcForceTuple.Nz;
             criticalForceLogic.StiffnessEI = stiffness.DX;
             criticalForceLogic.DesignLength = options.CompressedMember.GeometryLength * options.CompressedMember.LengthFactorY;
             var etaAlongY = criticalForceLogic.GetEtaFactor();
@@ -77,8 +77,8 @@ namespace StructureHelperLogics.NdmCalculations.Buckling
         {
             var gravityCenter = GeometryOperations.GetGravityCenter(ndmCollection);
 
-            var concreteInertia = GeometryOperations.GetMomentsOfInertiaMod(concreteNdms, gravityCenter);
-            var otherInertia = GeometryOperations.GetMomentsOfInertiaMod(otherNdms, gravityCenter);
+            var concreteInertia = GeometryOperations.GetReducedMomentsOfInertia(concreteNdms, gravityCenter);
+            var otherInertia = GeometryOperations.GetReducedMomentsOfInertia(otherNdms, gravityCenter);
 
             var stiffnessX = stiffnessLogicX.GetStiffnessCoeffitients();
             var dX = stiffnessX.Kc * concreteInertia.MomentX  + stiffnessX.Ks * otherInertia.MomentX;
@@ -127,7 +127,7 @@ namespace StructureHelperLogics.NdmCalculations.Buckling
             var checkResult = CheckInputData();
             if (checkResult != "")
             {
-                Result = new ConcreteBucklingResult() { IsValid = false, Desctription = checkResult };
+                Result = new ConcreteBucklingResult() { IsValid = false, Description = checkResult };
                 return;
             }
             else
diff --git a/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingResult.cs b/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingResult.cs
index 1d3e233..ac0bea7 100644
--- a/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingResult.cs
+++ b/StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingResult.cs
@@ -12,7 +12,7 @@ namespace StructureHelperLogics.NdmCalculations.Buckling
         /// <inheritdoc/>
         public bool IsValid { get; set; }
         /// <inheritdoc/>
-        public string Desctription { get; set; }
+        public string Description { get; set; }
         /// <inheritdoc/>
         public double EtaFactorAlongX { get; set; }
         /// <inheritdoc/>
diff --git a/StructureHelperLogics/NdmCalculations/Buckling/EilerCriticalForceLogic.cs b/StructureHelperLogics/NdmCalculations/Buckling/EilerCriticalForceLogic.cs
index 9a76b38..f97ee4a 100644
--- a/StructureHelperLogics/NdmCalculations/Buckling/EilerCriticalForceLogic.cs
+++ b/StructureHelperLogics/NdmCalculations/Buckling/EilerCriticalForceLogic.cs
@@ -10,7 +10,7 @@ namespace StructureHelperLogics.NdmCalculations.Buckling
 {
     internal class EilerCriticalForceLogic : IEilerCriticalForceLogic
     {
-        public double LongForce { get; set; }
+        public double LongitudinalForce { get; set; }
         public double StiffnessEI { get; set; }
         public double DesignLength { get; set; }
 
@@ -22,13 +22,13 @@ namespace StructureHelperLogics.NdmCalculations.Buckling
 
         public double GetEtaFactor()
         {
-            if (LongForce >= 0d) return 1d;
+            if (LongitudinalForce >= 0d) return 1d;
             var Ncr = GetCriticalForce();
-            if (LongForce <= Ncr)
+            if (LongitudinalForce <= Ncr)
             {
                 throw new StructureHelperException(ErrorStrings.LongitudinalForceMustBeLessThanCriticalForce);
             }
-            double eta = 1 / (1 - LongForce / Ncr);
+            double eta = 1 / (1 - LongitudinalForce / Ncr);
             return eta;
         }
     }
diff --git a/StructureHelperLogics/NdmCalculations/Buckling/IEilerCriticalForceLogic.cs b/StructureHelperLogics/NdmCalculations/Buckling/IEilerCriticalForceLogic.cs
index c778b72..fe0509c 100644
--- a/StructureHelperLogics/NdmCalculations/Buckling/IEilerCriticalForceLogic.cs
+++ b/StructureHelperLogics/NdmCalculations/Buckling/IEilerCriticalForceLogic.cs
@@ -8,7 +8,7 @@ namespace StructureHelperLogics.NdmCalculations.Buckling
 {
     internal interface IEilerCriticalForceLogic : ICriticalBucklingForceLogic
     {
-        double LongForce { get; set; }
+        double LongitudinalForce { get; set; }
         double StiffnessEI { get; set; }
         double DesignLength { get; set; }
 
diff --git a/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs b/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs
new file mode 100644
index 0000000..92b8f31
--- /dev/null
+++ b/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs
@@ -0,0 +1,160 @@
+using LoaderCalculator.Data.Matrix;
+using LoaderCalculator.Data.Ndms;
+using LoaderCalculator.Logics.Geometry;
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Infrastructures.Settings;
+using StructureHelperCommon.Models.Parameters;
+using StructureHelperCommon.Services.Units;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Services.NdmPrimitives
+{
+    public class TextParametersLogic
+    {
+        const string prefixInitial = "Initial";
+        const string prefixActual = "Actual";
+        static string firstAxisName => ProgramSetting.CrossSectionAxisNames.FirstAxis;
+        static string secondAxisName => ProgramSetting.CrossSectionAxisNames.SecondAxis;
+        static IEnumerable<IUnit> units = UnitsFactory.GetUnitCollection();
+        private IEnumerable<INdm> ndms;
+        private IStrainMatrix strainMatrix;
+        public List<ITextParameter> GetTextParameters()
+        {
+            var parameters = new List<ITextParameter>();
+            parameters.AddRange(GetGravityCenter(prefixInitial, ndms));
+            parameters.AddRange(GetArea(prefixInitial, ndms));
+            parameters.AddRange(GetSecondMomentOfArea(prefixInitial, ndms));
+            parameters.AddRange(GetGravityCenter(prefixActual, ndms, strainMatrix));
+            parameters.AddRange(GetArea(prefixActual, ndms, strainMatrix));
+            parameters.AddRange(GetSecondMomentOfArea(prefixActual, ndms, strainMatrix));
+            return parameters;
+        }
+
+        private IEnumerable<ITextParameter> GetSecondMomentOfArea(string prefix, IEnumerable<INdm> locNdms, IStrainMatrix? locStrainMatrix = null)
+        {
+            const string name = "Moment of inertia";
+            var parameters = new List<ITextParameter>();
+            var unitArea = CommonOperation.GetUnit(UnitTypes.Area, "mm2");
+            var unitStress = CommonOperation.GetUnit(UnitTypes.Stress, "MPa");
+            var unitName = $"{unitStress.Name} * {unitArea.Name} * {unitArea.Name}";
+            var unitMultiPlayer = unitArea.Multiplyer * unitArea.Multiplyer * unitStress.Multiplyer;
+            var firstParameter = new TextParameter()
+            {
+                IsValid = true,
+                Name = $"{prefix} {name} {firstAxisName.ToUpper()}",
+                ShortName = $"I{firstAxisName}",
+                MeasurementUnit = unitName,
+                Description = $"{prefix} {name} of cross-section arbitrary {firstAxisName}-axis multiplied by {prefix} modulus"
+            };
+            var secondParameter = new TextParameter()
+            {
+                IsValid = true,
+                Name = $"{prefix} {name} {secondAxisName}",
+                ShortName = $"I{secondAxisName}",
+                MeasurementUnit = unitName,
+                Description = $"{prefix} {name} of cross-section arbitrary {secondAxisName}-axis multiplied by {prefix} modulus"
+            };
+            try
+            {
+                var gravityCenter = GeometryOperations.GetReducedMomentsOfInertia(locNdms, locStrainMatrix);
+                firstParameter.Value = gravityCenter.MomentX * unitMultiPlayer;
+                secondParameter.Value = gravityCenter.MomentY * unitMultiPlayer;
+            }
+            catch (Exception ex)
+            {
+                firstParameter.IsValid = false;
+                firstParameter.Value = double.NaN;
+                firstParameter.Description += $": {ex}";
+                secondParameter.IsValid = false;
+                secondParameter.Value = double.NaN;
+                secondParameter.Description += $": {ex}";
+            }
+            parameters.Add(firstParameter);
+            parameters.Add(secondParameter);
+            return parameters;
+        }
+
+        private IEnumerable<ITextParameter> GetArea(string prefix, IEnumerable<INdm> locNdms, IStrainMatrix? locStrainMatrix = null)
+        {
+            var parameters = new List<ITextParameter>();
+            var unitArea = CommonOperation.GetUnit(UnitTypes.Area, "mm2");
+            var unitStress = CommonOperation.GetUnit(UnitTypes.Stress, "MPa");
+            var unitName = $"{unitStress.Name} * {unitArea.Name}" ;
+            var unitMultiPlayer = unitArea.Multiplyer * unitStress.Multiplyer;
+            var firstParameter = new TextParameter()
+            {
+                IsValid = true,
+                Name = $"{prefix} Area",
+                ShortName = "EA",
+                MeasurementUnit = unitName,
+                Description = $"{prefix} Area of cross-section multiplied by {prefix} modulus"
+            };
+            try
+            {
+                firstParameter.Value = GeometryOperations.GetReducedArea(locNdms, locStrainMatrix) * unitMultiPlayer;
+            }
+            catch (Exception ex)
+            {
+                firstParameter.IsValid = false;
+                firstParameter.Value = double.NaN;
+                firstParameter.Description += $": {ex}";
+            }
+            parameters.Add(firstParameter);
+            return parameters;
+        }
+
+        public TextParametersLogic(IEnumerable<INdm> ndms, IStrainMatrix strainMatrix)
+        {
+            this.ndms = ndms;
+            this.strainMatrix = strainMatrix;
+        }
+
+        private IEnumerable<ITextParameter> GetGravityCenter(string prefix, IEnumerable<INdm> locNdms, IStrainMatrix? locStrainMatrix = null)
+        {
+            var parameters = new List<ITextParameter>();
+            var unitType = UnitTypes.Length;
+            var unit = CommonOperation.GetUnit(unitType, "mm");
+            var unitName = unit.Name;
+            var unitMultiPlayer = unit.Multiplyer;
+            var firstParameter = new TextParameter()
+            {
+                IsValid = true,
+                Name = $"{prefix} Center{firstAxisName.ToUpper()}",
+                ShortName = $"{firstAxisName.ToUpper()}c",
+                MeasurementUnit = unitName,
+                Description = $"{prefix} Displacement of center of gravity of cross-section along {firstAxisName}-axis"
+            };
+            var secondParameter = new TextParameter()
+            {
+                IsValid = true,
+                Name = $"{prefix} Center{secondAxisName.ToUpper()}",
+                ShortName = $"{secondAxisName.ToUpper()}c",
+                MeasurementUnit = unitName,
+                Description = $"{prefix} Displacement of center of gravity of cross-section along {secondAxisName}-axis"
+            };
+            try
+            {
+                var gravityCenter = GeometryOperations.GetGravityCenter(locNdms, locStrainMatrix);
+                firstParameter.Value = gravityCenter.CenterX * unitMultiPlayer;
+                secondParameter.Value = gravityCenter.CenterY * unitMultiPlayer;
+            }
+            catch (Exception ex)
+            {
+                firstParameter.IsValid = false;
+                firstParameter.Value = double.NaN;
+                firstParameter.Description += $": {ex}";
+                secondParameter.IsValid = false;
+                secondParameter.Value = double.NaN;
+                secondParameter.Description += $": {ex}";
+            }
+            parameters.Add(firstParameter);
+            parameters.Add(secondParameter);
+            return parameters;
+        }
+    }
+}
diff --git a/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs b/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs
index f32e636..0606d6c 100644
--- a/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs
+++ b/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs
@@ -59,7 +59,7 @@ namespace StructureHelperTests.UnitTests.Ndms.Triangulations
             var ndms = NdmPrimitivesService.GetNdms(primitives, LimitStates.ULS, CalcTerms.ShortTerm);
             //Assert
             var area = ndms.Sum(x => x.Area);
-            var moments = GeometryOperations.GetMomentsOfInertiaMod(ndms);
+            var moments = GeometryOperations.GetReducedMomentsOfInertia(ndms);
             Assert.AreEqual(expectedArea, area, 0.001d);
             Assert.AreEqual(expectedMomX, moments.MomentX, 0.001d);
             Assert.AreEqual(expectedMomY, moments.MomentY, 1d);
@@ -89,7 +89,7 @@ namespace StructureHelperTests.UnitTests.Ndms.Triangulations
             var ndms = NdmPrimitivesService.GetNdms(primitives, LimitStates.ULS, CalcTerms.ShortTerm);
             //Assert
             var area = ndms.Sum(x => x.Area);
-            var moments = GeometryOperations.GetMomentsOfInertiaMod(ndms);
+            var moments = GeometryOperations.GetReducedMomentsOfInertia(ndms);
             Assert.AreEqual(expectedArea, area, 0.001d);
             Assert.AreEqual(expectedMomX, moments.MomentX, 0.001d);
             Assert.AreEqual(expectedMomY, moments.MomentY, 1d);
@@ -120,7 +120,7 @@ namespace StructureHelperTests.UnitTests.Ndms.Triangulations
             var ndms = NdmPrimitivesService.GetNdms(primitives, LimitStates.ULS, CalcTerms.ShortTerm);
             //Assert
             var area = ndms.Sum(x => x.Area);
-            var moments = GeometryOperations.GetMomentsOfInertiaMod(ndms);
+            var moments = GeometryOperations.GetReducedMomentsOfInertia(ndms);
             Assert.AreEqual(expectedArea, area, 0.001d);
             Assert.AreEqual(expectedMomX, moments.MomentX, 0.001d);
             Assert.AreEqual(expectedMomY, moments.MomentY, 1d);