diff --git a/StructureHelper/Infrastructure/UI/Resources/Converters.xaml b/StructureHelper/Infrastructure/UI/Resources/Converters.xaml
index d46f2f9..cfda1fd 100644
--- a/StructureHelper/Infrastructure/UI/Resources/Converters.xaml
+++ b/StructureHelper/Infrastructure/UI/Resources/Converters.xaml
@@ -12,4 +12,5 @@
     <convertersUnits:Moment x:Key="MomentConverter"/>
     <convertersUnits:Stress x:Key="StressConverter"/>
     <convertersUnits:Curvature x:Key="Curvature"/>
+    <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
 </ResourceDictionary>
\ No newline at end of file
diff --git a/StructureHelper/Infrastructure/UI/Resources/ItemEditPanels.xaml b/StructureHelper/Infrastructure/UI/Resources/ItemEditPanels.xaml
index c41aa47..3154b07 100644
--- a/StructureHelper/Infrastructure/UI/Resources/ItemEditPanels.xaml
+++ b/StructureHelper/Infrastructure/UI/Resources/ItemEditPanels.xaml
@@ -1,6 +1,6 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
-
+    
     <DataTemplate x:Key="SourceToTarget">
         <Grid>
             <Grid.ColumnDefinitions>
@@ -19,4 +19,27 @@
                      SelectedItem="{Binding SelectedTargetItem}" ItemTemplate="{Binding ItemDataDemplate}"/>
         </Grid>
     </DataTemplate>
+    <DataTemplate x:Key="SelectItems">
+        <StackPanel>
+            <StackPanel Height="25" Orientation="Horizontal" HorizontalAlignment="Right" Visibility="{Binding ShowButtons, Converter={StaticResource BooleanToVisibilityConverter}}">
+                <Button Content="Select All" Command="{Binding SelectAllCommand}"/>
+                <Button Content="Unselect All" Command="{Binding UnSelectAllCommand}"/>
+                <Button Content="Invert Selection" Command="{Binding InvertSelectionCommand}"/>
+            </StackPanel>
+            <ListBox ItemsSource="{Binding CollectionItems}" SelectedItem="SelectedItem">
+                <ListBox.ItemTemplate>
+                    <DataTemplate>
+                        <Grid>
+                            <Grid.ColumnDefinitions>
+                                <ColumnDefinition Width="22"/>
+                                <ColumnDefinition Width="*"/>
+                            </Grid.ColumnDefinitions>
+                            <CheckBox IsChecked="{Binding IsSelected}"/>
+                            <ContentControl Grid.Column="1" ContentTemplate="{StaticResource ColoredItemTemplate}" Content="{Binding Item}"/>
+                        </Grid>
+                    </DataTemplate>
+                </ListBox.ItemTemplate>
+            </ListBox>
+        </StackPanel>
+    </DataTemplate>
 </ResourceDictionary>
\ No newline at end of file
diff --git a/StructureHelper/Services/Exports/ExportToFileInputData.cs b/StructureHelper/Services/Exports/ExportToFileInputData.cs
new file mode 100644
index 0000000..951f612
--- /dev/null
+++ b/StructureHelper/Services/Exports/ExportToFileInputData.cs
@@ -0,0 +1,16 @@
+using StructureHelperLogics.NdmCalculations.Analyses;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Services.Exports
+{
+    internal class ExportToFileInputData : IExportToFileInputData
+    {
+        public string FileName { get; set; }
+        public string Filter { get; set; }
+        public string Title { get; set; }
+    }
+}
diff --git a/StructureHelper/Services/Exports/ExportToFileService.cs b/StructureHelper/Services/Exports/ExportToFileService.cs
new file mode 100644
index 0000000..a6bb77b
--- /dev/null
+++ b/StructureHelper/Services/Exports/ExportToFileService.cs
@@ -0,0 +1,97 @@
+using StructureHelper.Windows.Errors;
+using StructureHelper.Windows.ViewModels.Errors;
+using StructureHelperCommon.Infrastructures.Strings;
+using StructureHelperLogics.NdmCalculations.Analyses;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace StructureHelper.Services.Exports
+{
+    internal class ExportToFileService : IExportService
+    {
+        IExportToFileInputData inputData;
+        IExportResultLogic logic;
+
+        public ExportToFileService(IExportToFileInputData inputData, IExportResultLogic logic)
+        {
+            this.inputData = inputData;
+            this.logic = logic;
+        }
+        public void Export()
+        {
+            SaveFileDialog saveFileDialog = new SaveFileDialog();
+            saveFileDialog.Filter = inputData.Filter;
+            saveFileDialog.Title = inputData.Title;
+            if (saveFileDialog.ShowDialog() == DialogResult.OK)
+            {
+                var filename = saveFileDialog.FileName;
+                // If the file name is not an empty string open it for saving.
+                if (filename != "")
+                {
+                    SaveFile(filename);
+                }
+            }
+        }
+        private void SaveFile(string filename)
+        {
+            if (File.Exists(filename))
+            {
+                DeleteFile(filename);
+            }
+
+            try
+            {
+                ExportFile(filename);
+            }
+            catch (Exception ex)
+            {
+                var vm = new ErrorProcessor()
+                {
+                    ShortText = ErrorStrings.FileCantBeSaved + ex + filename,
+                    DetailText = $"{ex}"
+                };
+                new ErrorMessage(vm).ShowDialog();
+            }
+        }
+        private void DeleteFile(string filename)
+        {
+            try
+            {
+                File.Delete(filename);
+            }
+            catch (Exception ex)
+            {
+                var vm = new ErrorProcessor()
+                {
+                    ShortText = ErrorStrings.FileCantBeDeleted + ex + filename,
+                    DetailText = $"{ex}"
+                };
+                new ErrorMessage(vm).ShowDialog();
+            }
+        }
+        private void ExportFile(string fileName)
+        {
+            logic.FileName = fileName;
+            logic.Export();
+            try
+            {
+                OpenFile(fileName);
+            }
+            catch (Exception) { }
+        }
+        private void OpenFile(string fileName)
+        {
+            var filopener = new Process();
+            var startInfo = new ProcessStartInfo(fileName) { UseShellExecute = true };
+            filopener.StartInfo = startInfo;
+            filopener.Start();
+        }
+    }
+}
diff --git a/StructureHelper/Services/Exports/IExportService.cs b/StructureHelper/Services/Exports/IExportService.cs
new file mode 100644
index 0000000..0885465
--- /dev/null
+++ b/StructureHelper/Services/Exports/IExportService.cs
@@ -0,0 +1,14 @@
+using StructureHelperLogics.NdmCalculations.Analyses;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Services.Exports
+{
+    internal interface IExportService
+    {
+        void Export();
+    }
+}
diff --git a/StructureHelper/Services/Exports/IExportToFileInputData.cs b/StructureHelper/Services/Exports/IExportToFileInputData.cs
new file mode 100644
index 0000000..4712c74
--- /dev/null
+++ b/StructureHelper/Services/Exports/IExportToFileInputData.cs
@@ -0,0 +1,16 @@
+using StructureHelperLogics.NdmCalculations.Analyses;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Services.Exports
+{
+    internal interface IExportToFileInputData
+    {
+        string FileName { get; set; }
+        string Filter { get; set; }
+        string Title { get; set; }
+    }
+}
diff --git a/StructureHelper/StructureHelper.csproj.user b/StructureHelper/StructureHelper.csproj.user
index 7866b62..d1809bb 100644
--- a/StructureHelper/StructureHelper.csproj.user
+++ b/StructureHelper/StructureHelper.csproj.user
@@ -9,7 +9,7 @@
     </ApplicationDefinition>
   </ItemGroup>
   <ItemGroup>
-    <Compile Update="Windows\CalculationWindows\CalculatorsViews\GeometryCalculator\GeometryCalculatorResultView.xaml.cs">
+    <Compile Update="Windows\CalculationWindows\CalculatorsViews\GeometryCalculatorViews\GeometryCalculatorResultView.xaml.cs">
       <SubType>Code</SubType>
     </Compile>
     <Compile Update="Windows\Errors\ErrorMessage.xaml.cs">
@@ -38,7 +38,7 @@
     <Page Update="Infrastructure\UI\Resources\Materials.xaml">
       <SubType>Designer</SubType>
     </Page>
-    <Page Update="Windows\CalculationWindows\CalculatorsViews\GeometryCalculator\GeometryCalculatorResultView.xaml">
+    <Page Update="Windows\CalculationWindows\CalculatorsViews\GeometryCalculatorViews\GeometryCalculatorResultView.xaml">
       <SubType>Designer</SubType>
     </Page>
     <Page Update="Windows\Errors\ErrorMessage.xaml">
diff --git a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculatorViews/GeometryCalculatorResultView.xaml
similarity index 79%
rename from StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml
rename to StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculatorViews/GeometryCalculatorResultView.xaml
index 405e059..e7cddb7 100644
--- a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml
+++ b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculatorViews/GeometryCalculatorResultView.xaml
@@ -1,14 +1,18 @@
-<Window x:Class="StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCalculator.GeometryCalculatorResultView"
+<Window x:Class="StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCalculatorViews.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"
+        xmlns:local="clr-namespace:StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCalculatorViews"
+        xmlns:vm="clr-namespace:StructureHelper.Windows.ViewModels.Calculations.Calculators.GeometryCalculatorVMs"
         mc:Ignorable="d"
         d:DataContext="{d:DesignInstance vm:GeometryCalculatorResultViewModel}"
         Title="Geometry Properies" Height="450" Width="850" WindowStartupLocation="CenterScreen">
     <Grid>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition/>
+            <ColumnDefinition Width="90"/>
+        </Grid.ColumnDefinitions>
         <DataGrid x:Name="ResultGrid" IsReadOnly="True" AutoGenerateColumns="False" ItemsSource="{Binding TextParameters}">
             <DataGrid.RowStyle>
                 <Style TargetType="DataGridRow">
@@ -28,5 +32,8 @@
                 <DataGridTextColumn Header="Description" Width="400" Binding="{Binding Description}"/>
             </DataGrid.Columns>
         </DataGrid>
+        <StackPanel Grid.Column="1">
+            <Button Margin="3" Content="Export" ToolTip="Export results to *.csv" Command="{Binding ExportToCSVCommand}"/>
+        </StackPanel>
     </Grid>
 </Window>
diff --git a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml.cs b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculatorViews/GeometryCalculatorResultView.xaml.cs
similarity index 76%
rename from StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml.cs
rename to StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculatorViews/GeometryCalculatorResultView.xaml.cs
index af55770..5c2cc39 100644
--- a/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculator/GeometryCalculatorResultView.xaml.cs
+++ b/StructureHelper/Windows/CalculationWindows/CalculatorsViews/GeometryCalculatorViews/GeometryCalculatorResultView.xaml.cs
@@ -1,5 +1,6 @@
-using StructureHelper.Windows.ViewModels.Calculations.Calculators.GeometryCalculator;
+using StructureHelper.Windows.ViewModels.Calculations.Calculators.GeometryCalculatorVMs;
 using StructureHelperCommon.Models.Parameters;
+using StructureHelperLogics.NdmCalculations.Analyses.Geometry;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -14,7 +15,7 @@ using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using System.Windows.Shapes;
 
-namespace StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCalculator
+namespace StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCalculatorViews
 {
     /// <summary>
     /// Логика взаимодействия для GeometryCalculatorResultView.xaml
@@ -22,9 +23,9 @@ namespace StructureHelper.Windows.CalculationWindows.CalculatorsViews.GeometryCa
     public partial class GeometryCalculatorResultView : Window
     {
         GeometryCalculatorResultViewModel viewModel;
-        public GeometryCalculatorResultView(List<ITextParameter> textParameters)
+        public GeometryCalculatorResultView(IGeometryResult geometryResult)
         {
-            viewModel = new GeometryCalculatorResultViewModel(textParameters);
+            viewModel = new GeometryCalculatorResultViewModel(geometryResult);
             InitializeComponent();
             this.DataContext = viewModel;
         }
diff --git a/StructureHelper/Windows/Forces/InterpolateTuplesView.xaml b/StructureHelper/Windows/Forces/InterpolateTuplesView.xaml
index 97e31ef..46029cb 100644
--- a/StructureHelper/Windows/Forces/InterpolateTuplesView.xaml
+++ b/StructureHelper/Windows/Forces/InterpolateTuplesView.xaml
@@ -7,40 +7,52 @@
         xmlns:vm="clr-namespace:StructureHelper.Windows.ViewModels.Forces"
         d:DataContext="{d:DesignInstance vm:InterpolateTuplesViewModel}"
         mc:Ignorable="d"
-        Title="Interpolate Combinations" Height="200" Width="350" MinHeight="180" MinWidth="250" WindowStartupLocation="CenterScreen">
+        Title="Interpolate Combinations" Height="200" Width="440" MinHeight="180" MinWidth="440" WindowStartupLocation="CenterScreen">
     <Grid>
         <Grid.RowDefinitions>
             <RowDefinition/>
             <RowDefinition Height="40"/>
         </Grid.RowDefinitions>
         <Grid>
-            <Grid.RowDefinitions>
-                <RowDefinition Height="25"/>
-                <RowDefinition Height="25"/>
-                <RowDefinition Height="25"/>
-                <RowDefinition Height="25"/>
-                <RowDefinition/>
-            </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
-                <ColumnDefinition Width="120"/>
-                <ColumnDefinition/>
-                <ColumnDefinition/>
                 <ColumnDefinition/>
+                <ColumnDefinition Width="90"/>
             </Grid.ColumnDefinitions>
-            <TextBlock Grid.Column="1" Text="Moment Mx" HorizontalAlignment="Center"/>
-            <TextBlock Grid.Column="2" Text="Moment My" HorizontalAlignment="Center"/>
-            <TextBlock Grid.Column="3" Text="Force Nz" HorizontalAlignment="Center"/>
-            <TextBlock Grid.Row="1" Text="Start Combination"/>
-            <TextBox Grid.Row="1" Grid.Column="1" Text="{Binding StartDesignForce.ForceTuple.Mx, Converter={StaticResource MomentConverter}, ValidatesOnExceptions=True}"/>
-            <TextBox Grid.Row="1" Grid.Column="2" Text="{Binding StartDesignForce.ForceTuple.My, Converter={StaticResource MomentConverter}, ValidatesOnExceptions=True}"/>
-            <TextBox Grid.Row="1" Grid.Column="3" Text="{Binding StartDesignForce.ForceTuple.Nz, Converter={StaticResource ForceConverter}, ValidatesOnExceptions=True}"/>
-            <TextBlock Grid.Row="2" Text="Finish Combination"/>
-            <TextBox Grid.Row="2" Grid.Column="1" Text="{Binding FinishDesignForce.ForceTuple.Mx, Converter={StaticResource MomentConverter}, ValidatesOnExceptions=True}"/>
-            <TextBox Grid.Row="2" Grid.Column="2" Text="{Binding FinishDesignForce.ForceTuple.My, Converter={StaticResource MomentConverter}, ValidatesOnExceptions=True}"/>
-            <TextBox Grid.Row="2" Grid.Column="3" Text="{Binding FinishDesignForce.ForceTuple.Nz, Converter={StaticResource ForceConverter}, ValidatesOnExceptions=True}"/>
-            <TextBlock Grid.Row="3" Text="Step count"/>
-            <TextBox Grid.Row="3" Grid.Column="1" Text="{Binding StepCount, ValidatesOnExceptions=True}"/>
+            <Grid>
+                <Grid.RowDefinitions>
+                    <RowDefinition Height="25"/>
+                    <RowDefinition Height="25"/>
+                    <RowDefinition Height="25"/>
+                    <RowDefinition Height="25"/>
+                    <RowDefinition Height="40"/>
+                    <RowDefinition/>
+                </Grid.RowDefinitions>
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="120"/>
+                    <ColumnDefinition/>
+                    <ColumnDefinition/>
+                    <ColumnDefinition/>
+                </Grid.ColumnDefinitions>
+                <TextBlock Grid.Column="1" Text="Moment Mx" HorizontalAlignment="Center"/>
+                <TextBlock Grid.Column="2" Text="Moment My" HorizontalAlignment="Center"/>
+                <TextBlock Grid.Column="3" Text="Force Nz" HorizontalAlignment="Center"/>
+                <TextBlock Grid.Row="1" Text="Start Combination"/>
+                <TextBox Grid.Row="1" Grid.Column="1" Text="{Binding StartMx, Converter={StaticResource MomentConverter}, ValidatesOnExceptions=True}"/>
+                <TextBox Grid.Row="1" Grid.Column="2" Text="{Binding StartMy, Converter={StaticResource MomentConverter}, ValidatesOnExceptions=True}"/>
+                <TextBox Grid.Row="1" Grid.Column="3" Text="{Binding StartNz, Converter={StaticResource ForceConverter}, ValidatesOnExceptions=True}"/>
+                <TextBlock Grid.Row="2" Text="Finish Combination"/>
+                <TextBox Grid.Row="2" Grid.Column="1" Text="{Binding FinishMx, Converter={StaticResource MomentConverter}, ValidatesOnExceptions=True}"/>
+                <TextBox Grid.Row="2" Grid.Column="2" Text="{Binding FinishMy, Converter={StaticResource MomentConverter}, ValidatesOnExceptions=True}"/>
+                <TextBox Grid.Row="2" Grid.Column="3" Text="{Binding FinishNz, Converter={StaticResource ForceConverter}, ValidatesOnExceptions=True}"/>
+                <TextBlock Grid.Row="3" Text="Step count"/>
+                <TextBox Grid.Row="3" Grid.Column="1" Text="{Binding StepCount, ValidatesOnExceptions=True}"/>
+                
+            </Grid>
+            <StackPanel Grid.Column="1">
+                <Button Content="Invert comb's" Command="{Binding InvertForcesCommand}" />
+            </StackPanel>
         </Grid>
+        
         <StackPanel Grid.Row="1" Orientation="Horizontal" HorizontalAlignment="Right">
             <Button Style="{StaticResource CancelButton}"/>
             <Button Style="{StaticResource OkButton}" Click="Button_Click"/>
diff --git a/StructureHelper/Windows/MainWindow/Materials/MaterialDiagramView.xaml b/StructureHelper/Windows/MainWindow/Materials/MaterialDiagramView.xaml
index 8faca88..121a847 100644
--- a/StructureHelper/Windows/MainWindow/Materials/MaterialDiagramView.xaml
+++ b/StructureHelper/Windows/MainWindow/Materials/MaterialDiagramView.xaml
@@ -10,12 +10,53 @@
         mc:Ignorable="d"
         Title="Material Diagram" Height="450" Width="800" WindowStartupLocation="CenterScreen">
     <Grid>
-        <Grid.RowDefinitions>
-            <RowDefinition Height="22"/>
-            <RowDefinition/>
-        </Grid.RowDefinitions>
-        <TextBlock Text="{Binding MaterialName}"/>
-        <lvc:CartesianChart Grid.Row="1" Series="{Binding SeriesCollection}" LegendLocation="Right" >
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="250"/>
+            <ColumnDefinition/>
+        </Grid.ColumnDefinitions>
+        <Grid>
+            <Grid.RowDefinitions>
+                <RowDefinition/>
+                <RowDefinition Height="40"/>
+            </Grid.RowDefinitions>
+            <ScrollViewer VerticalScrollBarVisibility="Auto">
+                <StackPanel>
+                    <Expander Header="Materials" IsExpanded="True">
+                        <ContentControl ContentTemplate="{StaticResource ResourceKey=SelectItems}" Content="{Binding MaterialsModel}"/>
+                    </Expander>
+                    <Expander Header="Limit States">
+                        <ContentControl ContentTemplate="{StaticResource ResourceKey=SelectItems}" Content="{Binding LimitStatesModel}"/>
+                    </Expander>
+                    <Expander Header="Calculation terms">
+                        <ContentControl ContentTemplate="{StaticResource ResourceKey=SelectItems}" Content="{Binding CalcTermsModel}"/>
+                    </Expander>
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition/>
+                            <ColumnDefinition Width="100"/>
+                        </Grid.ColumnDefinitions>
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="22"/>
+                            <RowDefinition Height="22"/>
+                            <RowDefinition Height="22"/>
+                            <RowDefinition Height="22"/>
+                        </Grid.RowDefinitions>
+                        <TextBlock Text="Minimum strain"/>
+                        <TextBox Grid.Column="1" Text="{Binding MinValue, Converter={StaticResource PlainDouble}, ValidatesOnDataErrors=True}"/>
+                        <TextBlock Grid.Row="1" Text="Maximum strain"/>
+                        <TextBox Grid.Column="1" Grid.Row="1" Text="{Binding MaxValue, Converter={StaticResource PlainDouble}, ValidatesOnDataErrors=True}"/>
+                        <TextBlock Grid.Row="2" Text="Step count"/>
+                        <TextBox Grid.Column="1" Grid.Row="2" Text="{Binding StepCount, ValidatesOnDataErrors=True}"/>
+                        <TextBlock Grid.Row="3" Text="Positive in tension"/>
+                        <CheckBox Grid.Column="1" Grid.Row="3" Margin="4" IsChecked="{Binding PositiveInTension}"/>
+                    </Grid>
+                </StackPanel>
+            </ScrollViewer>
+            <StackPanel Grid.Row="1" Orientation="Horizontal" FlowDirection="RightToLeft">
+                <Button Content="Redraw Lines" Command="{Binding RedrawLinesCommand}"/>
+            </StackPanel>
+        </Grid>
+        <lvc:CartesianChart Grid.Column="1" Series="{Binding SeriesCollection}" LegendLocation="Bottom" >
             <lvc:CartesianChart.AxisY>
                 <lvc:Axis Title="Stress"></lvc:Axis>
             </lvc:CartesianChart.AxisY>
diff --git a/StructureHelper/Windows/MainWindow/Materials/MaterialDiagramView.xaml.cs b/StructureHelper/Windows/MainWindow/Materials/MaterialDiagramView.xaml.cs
index df91854..c753ed3 100644
--- a/StructureHelper/Windows/MainWindow/Materials/MaterialDiagramView.xaml.cs
+++ b/StructureHelper/Windows/MainWindow/Materials/MaterialDiagramView.xaml.cs
@@ -31,7 +31,7 @@ namespace StructureHelper.Windows.MainWindow.Materials
             InitializeComponent();
             this.DataContext = this.vm;
         }
-        public MaterialDiagramView(IHeadMaterial material) : this(new MaterialDiagramViewModel(material))
+        public MaterialDiagramView(IEnumerable<IHeadMaterial> headMaterials, IHeadMaterial material) : this(new MaterialDiagramViewModel(headMaterials, material))
         {
             
         }
diff --git a/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml b/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml
index 7304067..97d8002 100644
--- a/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml
+++ b/StructureHelper/Windows/PrimitivePropertiesWindow/SelectPrimitivesView.xaml
@@ -10,29 +10,10 @@
         Title="Select Primitives" Height="250" Width="250" WindowStartupLocation="CenterScreen" ResizeMode="NoResize">
     <Grid>
         <Grid.RowDefinitions>
-            <RowDefinition Height="25"/>
             <RowDefinition Height="*"/>
             <RowDefinition Height="35"/>
         </Grid.RowDefinitions>
-        <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>
-                        <Grid.ColumnDefinitions>
-                            <ColumnDefinition Width="22"/>
-                            <ColumnDefinition Width="*"/>
-                        </Grid.ColumnDefinitions>
-                        <CheckBox IsChecked="{Binding IsSelected}"/>
-                        <ContentControl Grid.Column="1" ContentTemplate="{StaticResource ColoredItemTemplate}" Content="{Binding Item}"/>
-                    </Grid>
-                </DataTemplate>
-            </ListBox.ItemTemplate>
-        </ListBox>
+        <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"/>
diff --git a/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs b/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
index ddbbf50..ddfb562 100644
--- a/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
@@ -1,26 +1,26 @@
 using LoaderCalculator.Data.Matrix;
 using LoaderCalculator.Data.Ndms;
 using StructureHelper.Infrastructure;
-using StructureHelper.Infrastructure.UI.DataContexts;
+using StructureHelper.Services.Exports;
 using StructureHelper.Services.Reports;
 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.CalculationWindows.CalculatorsViews.GeometryCalculatorViews;
 using StructureHelper.Windows.Errors;
 using StructureHelper.Windows.Forces;
 using StructureHelper.Windows.PrimitivePropertiesWindow;
 using StructureHelper.Windows.ViewModels.Errors;
 using StructureHelper.Windows.ViewModels.Forces;
 using StructureHelper.Windows.ViewModels.PrimitiveProperties;
-using StructureHelperCommon.Infrastructures.Exceptions;
 using StructureHelperCommon.Infrastructures.Strings;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperCommon.Models.Shapes;
 using StructureHelperCommon.Services.Forces;
 using StructureHelperLogics.NdmCalculations.Analyses;
 using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using StructureHelperLogics.NdmCalculations.Analyses.Geometry;
 using StructureHelperLogics.NdmCalculations.Primitives;
 using StructureHelperLogics.Services.NdmCalculations;
 using StructureHelperLogics.Services.NdmPrimitives;
@@ -29,8 +29,6 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
 using System.Windows.Input;
 
@@ -87,56 +85,13 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
         }
         private void ExportToCSV()
         {
-            SaveFileDialog saveFileDialog = new SaveFileDialog();
-            saveFileDialog.Filter = "csv |*.csv";
-            saveFileDialog.Title = "Save in csv File";
-            if (saveFileDialog.ShowDialog() == DialogResult.OK)
-            {
-                var filename = saveFileDialog.FileName;
-                // If the file name is not an empty string open it for saving.
-                if (filename != "")
-                {
-                    if (File.Exists(filename))
-                    {
-                        try
-                        {
-                            File.Delete(filename);
-                        }
-                        catch (Exception ex)
-                        {
-                            var vm = new ErrorProcessor()
-                            {
-                                ShortText = ErrorStrings.FileCantBeDeleted + ex + filename,
-                                DetailText = $"{ex}"
-                            };
-                            new ErrorMessage(vm).ShowDialog();
-                        }
-                    }
-
-                    try
-                    {
-                        var logic = new ExportToCSVLogic(saveFileDialog.FileName);
-                        logic.Export(forcesResults);
-                        try
-                        {
-                            var filopener = new Process();
-                            var startInfo = new ProcessStartInfo(saveFileDialog.FileName) { UseShellExecute = true};
-                            filopener.StartInfo = startInfo;
-                            filopener.Start();
-                        }
-                        catch (Exception) { }
-                    }
-                    catch (Exception ex)
-                    {
-                        var vm = new ErrorProcessor()
-                        {
-                            ShortText = ErrorStrings.FileCantBeSaved + ex + filename,
-                            DetailText = $"{ex}"
-                        };
-                        new ErrorMessage(vm).ShowDialog();
-                    }
-                }
-            }
+            var inputData = new ExportToFileInputData();
+            inputData.FileName = "New File";
+            inputData.Filter = "csv |*.csv";
+            inputData.Title = "Save in csv File";
+            var logic = new ExportForceResultToCSVLogic(forcesResults);
+            var exportService = new ExportToFileService(inputData, logic);
+            exportService.Export();
         }
 
         public RelayCommand InterpolateCommand
@@ -248,8 +203,10 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
                 {
                     var strainMatrix = SelectedResult.LoaderResults.ForceStrainPair.StrainMatrix;
                     var textParametrsLogic = new TextParametersLogic(ndms, strainMatrix);
-                    var textParameters = textParametrsLogic.GetTextParameters();
-                    var wnd = new GeometryCalculatorResultView(textParameters);
+                    var calculator = new GeometryCalculator(textParametrsLogic);
+                    calculator.Run();
+                    var result = calculator.Result as IGeometryResult;         
+                    var wnd = new GeometryCalculatorResultView(result);
                     wnd.ShowDialog();
                 }
                 catch (Exception ex)
diff --git a/StructureHelper/Windows/ViewModels/Calculations/Calculators/GeometryCalculator/GeometryCalculatorResultViewModel.cs b/StructureHelper/Windows/ViewModels/Calculations/Calculators/GeometryCalculator/GeometryCalculatorResultViewModel.cs
deleted file mode 100644
index 1c51511..0000000
--- a/StructureHelper/Windows/ViewModels/Calculations/Calculators/GeometryCalculator/GeometryCalculatorResultViewModel.cs
+++ /dev/null
@@ -1,24 +0,0 @@
-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/Calculations/Calculators/GeometryCalculatorVMs/GeometryCalculatorResultViewModel.cs b/StructureHelper/Windows/ViewModels/Calculations/Calculators/GeometryCalculatorVMs/GeometryCalculatorResultViewModel.cs
new file mode 100644
index 0000000..03024d2
--- /dev/null
+++ b/StructureHelper/Windows/ViewModels/Calculations/Calculators/GeometryCalculatorVMs/GeometryCalculatorResultViewModel.cs
@@ -0,0 +1,44 @@
+using StructureHelper.Infrastructure;
+using StructureHelper.Services.Exports;
+using StructureHelperCommon.Models.Parameters;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using StructureHelperLogics.NdmCalculations.Analyses;
+using StructureHelperLogics.NdmCalculations.Analyses.Geometry;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace StructureHelper.Windows.ViewModels.Calculations.Calculators.GeometryCalculatorVMs
+{
+    internal class GeometryCalculatorResultViewModel : ViewModelBase
+    {
+        IGeometryResult result;
+        private ICommand exportToCSVCommand;
+
+        public List<ITextParameter> TextParameters
+        { 
+            get => result.TextParameters;
+        }
+        public ICommand ExportToCSVCommand
+        {
+            get => exportToCSVCommand ??= new RelayCommand(o => ExportToCSV());
+        }
+        public GeometryCalculatorResultViewModel(IGeometryResult geometryResult)
+        {
+            this.result = geometryResult;
+        }
+        private void ExportToCSV()
+        {
+            var inputData = new ExportToFileInputData();
+            inputData.FileName = "New File";
+            inputData.Filter = "csv |*.csv";
+            inputData.Title = "Save in csv File";
+            var logic = new ExportGeometryResultToCSVLogic(result);
+            var exportService = new ExportToFileService(inputData, logic);
+            exportService.Export();
+        }
+    }
+}
diff --git a/StructureHelper/Windows/ViewModels/Forces/InterpolateTuplesViewModel.cs b/StructureHelper/Windows/ViewModels/Forces/InterpolateTuplesViewModel.cs
index 0448093..154352d 100644
--- a/StructureHelper/Windows/ViewModels/Forces/InterpolateTuplesViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/Forces/InterpolateTuplesViewModel.cs
@@ -7,15 +7,90 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Windows.Input;
 
 namespace StructureHelper.Windows.ViewModels.Forces
 {
     public class InterpolateTuplesViewModel : OkCancelViewModelBase
     {
-        public IDesignForceTuple StartDesignForce { get; }
-        public IDesignForceTuple FinishDesignForce { get; }
+        private RelayCommand invertForcesCommand;
+
+        public IDesignForceTuple StartDesignForce { get; private set; }
+        public IDesignForceTuple FinishDesignForce { get; private set; }
+        public double StartMx
+        {
+            get => StartDesignForce.ForceTuple.Mx;
+            set
+            {
+                StartDesignForce.ForceTuple.Mx = value;
+                OnPropertyChanged(nameof(StartMx));
+            }
+        }
+        public double StartMy
+        {
+            get => StartDesignForce.ForceTuple.My;
+            set
+            {
+                StartDesignForce.ForceTuple.My = value;
+                OnPropertyChanged(nameof(StartMy));
+            }
+        }
+        public double StartNz
+        {
+            get => StartDesignForce.ForceTuple.Nz;
+            set
+            {
+                StartDesignForce.ForceTuple.Nz = value;
+                OnPropertyChanged(nameof(StartNz));
+            }
+        }
+        public double FinishMx
+        {
+            get => FinishDesignForce.ForceTuple.Mx;
+            set
+            {
+                FinishDesignForce.ForceTuple.Mx = value;
+                OnPropertyChanged(nameof(FinishMx));
+            }
+        }
+        public double FinishMy
+        {
+            get => FinishDesignForce.ForceTuple.My;
+            set
+            {
+                FinishDesignForce.ForceTuple.My = value;
+                OnPropertyChanged(nameof(FinishMy));
+            }
+        }
+        public double FinishNz
+        {
+            get => FinishDesignForce.ForceTuple.Nz;
+            set
+            {
+                FinishDesignForce.ForceTuple.Nz = value;
+                OnPropertyChanged(nameof(FinishNz));
+            }
+        }
         public int StepCount { get; set; }
 
+        public ICommand InvertForcesCommand
+        {
+            get => invertForcesCommand ??= new RelayCommand(o => InvertForces());
+        }
+
+        private void InvertForces()
+        {
+            var tmpForce = StartDesignForce.Clone() as IDesignForceTuple;
+            StartDesignForce = FinishDesignForce;
+            FinishDesignForce = tmpForce;
+            OnPropertyChanged(nameof(StartMx));
+            OnPropertyChanged(nameof(StartMy));
+            OnPropertyChanged(nameof(StartNz));
+            OnPropertyChanged(nameof(FinishMx));
+            OnPropertyChanged(nameof(FinishMy));
+            OnPropertyChanged(nameof(FinishNz));
+        }
+
         public InterpolateTuplesViewModel(IDesignForceTuple finishDesignForce, IDesignForceTuple startDesignForce=null, int stepCount = 100)
         {
             if (startDesignForce !=null)
diff --git a/StructureHelper/Windows/ViewModels/Materials/HeadMaterialsViewModel.cs b/StructureHelper/Windows/ViewModels/Materials/HeadMaterialsViewModel.cs
index f333010..51459af 100644
--- a/StructureHelper/Windows/ViewModels/Materials/HeadMaterialsViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/Materials/HeadMaterialsViewModel.cs
@@ -92,7 +92,7 @@ namespace StructureHelper.Windows.ViewModels.Materials
                 return showMaterialDiagram ??= new RelayCommand(o =>
                     {
                         var material = selectedMaterial;
-                        var wnd = new MaterialDiagramView(material);
+                        var wnd = new MaterialDiagramView(headMaterials, material);
                         wnd.ShowDialog();
 
                     }, o => SelectedMaterial != null
diff --git a/StructureHelper/Windows/ViewModels/Materials/MaterialDiagramViewModel.cs b/StructureHelper/Windows/ViewModels/Materials/MaterialDiagramViewModel.cs
index 3e875ff..f58e2c8 100644
--- a/StructureHelper/Windows/ViewModels/Materials/MaterialDiagramViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/Materials/MaterialDiagramViewModel.cs
@@ -1,76 +1,166 @@
 using LiveCharts;
 using LiveCharts.Wpf;
+using StructureHelper.Infrastructure;
 using StructureHelper.Infrastructure.UI.Converters.Units;
 using StructureHelper.Models.Materials;
 using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Infrastructures.Settings;
 using StructureHelperLogics.Models.Materials;
 using System;
 using System.Collections.Generic;
-using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Input;
 using System.Windows.Media;
-using Brushes = System.Windows.Media.Brushes;
 
 namespace StructureHelper.Windows.ViewModels.Materials
 {
-    public class MaterialDiagramViewModel
+    public class MaterialDiagramViewModel : ViewModelBase
     {
         private IHeadMaterial material;
-        public string MaterialName => material.Name; 
+        private ICommand redrawLinesCommand;
+        double minValue;
+        double maxValue;
+        int stepCount;
+        bool positiveInTension;
+
+        public string MaterialName => material.Name;
+        public double MinValue
+        {
+            get => minValue;
+            set
+            {
+                minValue = Math.Min(value, maxValue - 0.001d);
+                OnPropertyChanged(nameof(MinValue));
+            }
+        }
+        public double MaxValue
+        {
+            get => maxValue;
+            set
+            {
+                maxValue = Math.Max(value, minValue + 0.001d);
+                OnPropertyChanged(nameof(MaxValue));
+            }
+        }
+        public int StepCount
+        {
+            get => stepCount;
+            set
+            {
+                stepCount = value;
+                stepCount = Math.Max(stepCount, 10);
+                stepCount = Math.Min(stepCount, 500);
+                OnPropertyChanged(nameof(StepCount));
+            }
+        }
+        public bool PositiveInTension
+        {
+            get => positiveInTension;
+            set
+            {
+                positiveInTension = value;
+                var tmpMinValue = minValue;
+                minValue = maxValue * -1d;
+                maxValue = tmpMinValue * -1d;
+                OnPropertyChanged(nameof(PositiveInTension));
+                OnPropertyChanged(nameof(MinValue));
+                OnPropertyChanged(nameof(MaxValue));
+            }
+        }
+        public SelectItemsViewModel<IHeadMaterial> MaterialsModel { get; private set; }
+        public SelectItemsViewModel<LimitStateEntity> LimitStatesModel { get; private set; }
+        public SelectItemsViewModel<CalcTermEntity> CalcTermsModel { get; private set; }
         public SeriesCollection SeriesCollection { get; set; }
         public List<string> Labels { get; set; }
         public Func<double, string> YFormatter { get; set; }
 
-        public MaterialDiagramViewModel(IHeadMaterial material)
+        public ICommand RedrawLinesCommand
         {
+            get => redrawLinesCommand ??= new RelayCommand(o => DrawLines(), b => IsDrawPossible());
+        }
+
+        public MaterialDiagramViewModel(IEnumerable<IHeadMaterial> headMaterials, IHeadMaterial material)
+        {
+            MaterialsModel = new SelectItemsViewModel<IHeadMaterial>(headMaterials) { ShowButtons = true};
+            LimitStatesModel = new SelectItemsViewModel<LimitStateEntity>(ProgramSetting.LimitStatesList.LimitStates) { ShowButtons = false};
+            CalcTermsModel = new SelectItemsViewModel<CalcTermEntity>(ProgramSetting.CalcTermList.CalcTerms) { ShowButtons = false};
+            foreach (var item in MaterialsModel.CollectionItems)
+            {
+                if (item.Item == material)
+                {
+                    item.IsSelected = true;
+                }
+                else item.IsSelected = false;
+            }
             this.material = material;
+            minValue = -0.005d;
+            maxValue = 0.005d;
+            stepCount = 50;
+            positiveInTension = true;
             SetLines();
         }
 
         private void SetLines()
         {
-            var titles = new List<string>() { "ULS Short Term", "ULS Long Term", "SLS Short Term","SLS Long Term"};
-            var limitStates = new List<LimitStates> { LimitStates.ULS, LimitStates.SLS };
-            var calcTerms = new List<CalcTerms> { CalcTerms.ShortTerm, CalcTerms.LongTerm };
+            var materials = MaterialsModel.CollectionItems.Where(x => x.IsSelected == true).Select(x => x.Item);
+            var limitStates = LimitStatesModel.CollectionItems.Where(x => x.IsSelected == true).Select(x => x.Item);
+            var calcTerms = CalcTermsModel.CollectionItems.Where(x => x.IsSelected == true).Select(x => x.Item); ;
             var labels = new List<string>();
+            var factor = positiveInTension ? 1d : -1d;
 
-            double minValue = -0.005d;
-            double maxValue = 0.005d;
-            if (material.HelperMaterial is IConcreteLibMaterial)
-            {
-                maxValue = 0.0005d;
-            }
-            int stepCount = 100;
             double step = (maxValue - minValue) / stepCount;
 
             SeriesCollection = new SeriesCollection();
 
-            for (int i = 0; i < limitStates.Count(); i++)
+            foreach (var limitState in limitStates)
             {
-                for (int j = 0; j < calcTerms.Count(); j++)
+                foreach (var calcTerm in calcTerms)
                 {
-                    int n = i * 2 + j;
-                    var line = new LineSeries() { Title = titles[n], PointGeometry = null, Fill = Brushes.Transparent};
-                    var chartValues = new ChartValues<double>();
-
-                    var loaderMaterial = material.GetLoaderMaterial(limitStates[i], calcTerms[j]);
-                    var title = titles[n];
-                    for (double s = minValue; s < maxValue; s += step)
+                    foreach (var material in materials)
                     {
-                        double diagramValue = Math.Round(loaderMaterial.Diagram.Invoke(loaderMaterial.DiagramParameters,s)) * UnitConstants.Stress;
-                        //var point = new PointF() { X = (float)s, Y = (float)diagramValue };
-                        //chartValues.Add(point);
-                        chartValues.Add(diagramValue);
-                        labels.Add(Convert.ToString(Math.Round(s,4)));
+                        var loaderMaterial = material.GetLoaderMaterial(limitState.LimitState, calcTerm.CalcTerm);
+                        var lineSeries = new LineSeries()
+                        { Title = $"{material.Name} ({calcTerm.ShortName} {limitState.ShortName})",
+                            PointGeometry = null,
+                            Fill = Brushes.Transparent,
+                        };
+                        if (limitStates.Count() == 1 && calcTerms.Count() == 1)
+                        {
+                            lineSeries.Stroke = new SolidColorBrush(material.Color);
+                        }
+                        var chartValues = new ChartValues<double>();
+                        for (double s = minValue; s < maxValue; s += step)
+                        {
+                            //var trueStep = s * factor;
+                            double diagramValue = Math.Round(loaderMaterial.Diagram.Invoke(loaderMaterial.DiagramParameters, s * factor)) * factor * UnitConstants.Stress;
+                            //var point = new PointF() { X = (float)s, Y = (float)diagramValue };
+                            //chartValues.Add(point);
+                            chartValues.Add(diagramValue);
+                            labels.Add(Convert.ToString(Math.Round(s , 4)));
+                        }
+                        lineSeries.Values = chartValues;
+                        SeriesCollection.Add(lineSeries);
                     }
-                    line.Values = chartValues;
-                    SeriesCollection.Add(line);
                 }
             }
             Labels = labels;
         }
+        private void DrawLines()
+        {
+            SetLines();
+            OnPropertyChanged(nameof(SeriesCollection));
+            OnPropertyChanged(nameof(Labels));
+        }
+
+        private bool IsDrawPossible()
+        {
+            if (MaterialsModel.CollectionItems.Count == 0) return false;
+            if (LimitStatesModel.CollectionItems.Count == 0) return false;
+            if (CalcTermsModel.CollectionItems.Count == 0) return false;
+            return true;
+        }
     }
 }
diff --git a/StructureHelper/Windows/ViewModels/NdmCrossSections/PrimitiveViewModelLogic.cs b/StructureHelper/Windows/ViewModels/NdmCrossSections/PrimitiveViewModelLogic.cs
index 62bed2b..61bfac1 100644
--- a/StructureHelper/Windows/ViewModels/NdmCrossSections/PrimitiveViewModelLogic.cs
+++ b/StructureHelper/Windows/ViewModels/NdmCrossSections/PrimitiveViewModelLogic.cs
@@ -188,7 +188,18 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
             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) { primitiveBase = new PointViewPrimitive(newPrimitive as IPointPrimitive); }
+            else if (newPrimitive is IPointPrimitive)
+            {
+                if (newPrimitive is ReinforcementPrimitive)
+                {
+                    primitiveBase = new ReinforcementViewPrimitive(newPrimitive as ReinforcementPrimitive);
+                }
+                else
+                {
+                    primitiveBase = new PointViewPrimitive(newPrimitive as IPointPrimitive);
+                }
+                
+            }
             else throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknown);
             primitiveBase.RegisterDeltas(CanvasWidth / 2, CanvasHeight / 2);
             Items.Add(primitiveBase);
diff --git a/StructureHelper/Windows/ViewModels/PrimitiveProperties/SelectPrimitivesViewModel.cs b/StructureHelper/Windows/ViewModels/PrimitiveProperties/SelectPrimitivesViewModel.cs
index 3206647..6d86ef6 100644
--- a/StructureHelper/Windows/ViewModels/PrimitiveProperties/SelectPrimitivesViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/PrimitiveProperties/SelectPrimitivesViewModel.cs
@@ -16,7 +16,7 @@ namespace StructureHelper.Windows.ViewModels.PrimitiveProperties
         public SelectPrimitivesViewModel(IEnumerable<INdmPrimitive> primitives)
         {
             var primitiveViews = PrimitiveOperations.ConvertNdmPrimitivesToPrimitiveBase(primitives);
-            Items = new SelectItemsViewModel<PrimitiveBase>(primitiveViews);
+            Items = new SelectItemsViewModel<PrimitiveBase>(primitiveViews) { ShowButtons = true };
             Items.ItemDataDemplate = Application.Current.Resources["ColoredItemTemplate"] as DataTemplate;
         }
     }
diff --git a/StructureHelper/Windows/ViewModels/SelectItemsViewModel.cs b/StructureHelper/Windows/ViewModels/SelectItemsViewModel.cs
index 86ca977..f043d3d 100644
--- a/StructureHelper/Windows/ViewModels/SelectItemsViewModel.cs
+++ b/StructureHelper/Windows/ViewModels/SelectItemsViewModel.cs
@@ -36,7 +36,7 @@ namespace StructureHelper.Windows.ViewModels
         }
 
         public DataTemplate ItemDataDemplate { get; set; }
-
+        public bool ShowButtons { get; set; }
         public ObservableCollection<CollectionItem> CollectionItems { get; }
 
         public ICommand SelectAllCommand
diff --git a/StructureHelperCommon/Infrastructures/Settings/CalcTermEntity.cs b/StructureHelperCommon/Infrastructures/Settings/CalcTermEntity.cs
new file mode 100644
index 0000000..63e722e
--- /dev/null
+++ b/StructureHelperCommon/Infrastructures/Settings/CalcTermEntity.cs
@@ -0,0 +1,23 @@
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Services.ColorServices;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+
+namespace StructureHelperCommon.Infrastructures.Settings
+{
+    public class CalcTermEntity
+    {
+        public CalcTerms CalcTerm { get; set; }
+        public Color Color { get; set; }
+        public string? Name { get; set; }
+        public string ShortName { get; set; }
+        public CalcTermEntity()
+        {
+            Color = ColorProcessor.GetRandomColor();
+        }
+    }
+}
diff --git a/StructureHelperCommon/Infrastructures/Settings/CalcTermList.cs b/StructureHelperCommon/Infrastructures/Settings/CalcTermList.cs
new file mode 100644
index 0000000..ecaa103
--- /dev/null
+++ b/StructureHelperCommon/Infrastructures/Settings/CalcTermList.cs
@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+
+namespace StructureHelperCommon.Infrastructures.Settings
+{
+    public class CalcTermList
+    {
+        public List<CalcTermEntity> CalcTerms { get; private set; }
+        public CalcTermList()
+        {
+            CalcTerms = new List<CalcTermEntity>()
+            {
+                new CalcTermEntity()
+                {CalcTerm = Enums.CalcTerms.ShortTerm,
+                   Name = "Short term",
+                   ShortName = "Short term",
+                   Color = (Color)ColorConverter.ConvertFromString("Red")},
+                new CalcTermEntity()
+                {CalcTerm = Enums.CalcTerms.LongTerm,
+                   Name = "Long term",
+                   ShortName = "Long term",
+                   Color = (Color)ColorConverter.ConvertFromString("Green")}
+            };
+        }
+    }
+}
diff --git a/StructureHelperCommon/Infrastructures/Settings/LimitStateEntity.cs b/StructureHelperCommon/Infrastructures/Settings/LimitStateEntity.cs
new file mode 100644
index 0000000..a950a64
--- /dev/null
+++ b/StructureHelperCommon/Infrastructures/Settings/LimitStateEntity.cs
@@ -0,0 +1,23 @@
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Services.ColorServices;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+
+namespace StructureHelperCommon.Infrastructures.Settings
+{
+    public class LimitStateEntity
+    {
+        public LimitStates LimitState { get; set; }
+        public Color Color { get; set; }
+        public string? Name { get; set; }
+        public string ShortName { get; set; }
+        public LimitStateEntity()
+        {
+            Color = ColorProcessor.GetRandomColor();
+        }
+    }
+}
diff --git a/StructureHelperCommon/Infrastructures/Settings/LimitStatesList.cs b/StructureHelperCommon/Infrastructures/Settings/LimitStatesList.cs
new file mode 100644
index 0000000..333d85b
--- /dev/null
+++ b/StructureHelperCommon/Infrastructures/Settings/LimitStatesList.cs
@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+
+namespace StructureHelperCommon.Infrastructures.Settings
+{
+    public class LimitStatesList
+    {
+        public List<LimitStateEntity> LimitStates { get; private set; }
+        public LimitStatesList()
+        {
+            LimitStates = new List<LimitStateEntity>()
+            {
+               new LimitStateEntity()
+                   {LimitState = Enums.LimitStates.ULS,
+                   Name = "Ultimate limit state",
+                   ShortName = "ULS",
+                   Color = (Color)ColorConverter.ConvertFromString("Red")},
+               new LimitStateEntity()
+                   {LimitState = Enums.LimitStates.SLS,
+                   Name = "Serviceability limit state",
+                   ShortName = "SLS",
+                   Color = (Color)ColorConverter.ConvertFromString("Green")}
+            };
+        }
+    }
+}
diff --git a/StructureHelperCommon/Infrastructures/Settings/ProgramSetting.cs b/StructureHelperCommon/Infrastructures/Settings/ProgramSetting.cs
index 83751c3..c75b0d2 100644
--- a/StructureHelperCommon/Infrastructures/Settings/ProgramSetting.cs
+++ b/StructureHelperCommon/Infrastructures/Settings/ProgramSetting.cs
@@ -7,5 +7,7 @@ namespace StructureHelperCommon.Infrastructures.Settings
     {
         public static CodeTypes CodeType => CodeTypes.SP63_13330_2018;
         public static CrossSectionAxisNames CrossSectionAxisNames => new CrossSectionAxisNames();
+        public static LimitStatesList LimitStatesList => new LimitStatesList();
+        public static CalcTermList CalcTermList => new CalcTermList();
     }
 }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ExportForceResultToCSVLogic.cs b/StructureHelperLogics/NdmCalculations/Analyses/ExportForceResultToCSVLogic.cs
new file mode 100644
index 0000000..f74ddb4
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ExportForceResultToCSVLogic.cs
@@ -0,0 +1,80 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Strings;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses
+{
+    public class ExportForceResultToCSVLogic : IExportResultLogic
+    {
+        const string separator = ";";
+        StringBuilder output;
+        IForcesResults results;
+        public string FileName { get; set; }
+
+        public void Export()
+        {
+            ExportHeadings();
+            ExportBoby();
+            try
+            {
+                File.AppendAllText(FileName, output.ToString());
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("Data could not be written to the CSV file.");
+                return;
+            }
+        }
+
+        public ExportForceResultToCSVLogic(IForcesResults forcesResults)
+        {
+            this.results = forcesResults;
+            output = new StringBuilder();
+        }
+
+        private void ExportHeadings()
+        {
+            string[] headings =
+    {
+                    "Limit State",
+                    "Calc duration",
+                    "Mx",
+                    "My",
+                    "Nz",
+                    "kx",
+                    "ky",
+                    "epsz"
+                };
+            output.AppendLine(string.Join(separator, headings));
+        }
+        private void ExportBoby()
+        {
+            foreach (var item in results.ForcesResultList)
+            {
+                if (item.IsValid == true)
+                {
+                    var tuple = item.DesignForceTuple.ForceTuple;
+                    var strainMatrix = item.LoaderResults.StrainMatrix;
+                    string[] newLine =
+                        {
+                            item.DesignForceTuple.LimitState.ToString(),
+                            item.DesignForceTuple.CalcTerm.ToString(),
+                            tuple.Mx.ToString(),
+                            tuple.My.ToString(),
+                            tuple.Nz.ToString(),
+                            strainMatrix.Kx.ToString(),
+                            strainMatrix.Ky.ToString(),
+                            strainMatrix.EpsZ.ToString()
+                        };
+                    output.AppendLine(string.Join(separator, newLine));
+                }
+            }
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ExportGeometryResultToCSVLogic.cs b/StructureHelperLogics/NdmCalculations/Analyses/ExportGeometryResultToCSVLogic.cs
new file mode 100644
index 0000000..8c6ba64
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ExportGeometryResultToCSVLogic.cs
@@ -0,0 +1,67 @@
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using StructureHelperLogics.NdmCalculations.Analyses.Geometry;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses
+{
+    public class ExportGeometryResultToCSVLogic : IExportResultLogic
+    {
+        const string separator = ";";
+        StringBuilder output;
+        IGeometryResult result;
+        public string FileName { get; set; }
+        public ExportGeometryResultToCSVLogic(IGeometryResult geometryResult)
+        {
+            this.result = geometryResult;
+            output = new StringBuilder();
+        }
+        public void Export()
+        {
+            ExportHeadings();
+            ExportBoby();
+            try
+            {
+                File.AppendAllText(FileName, output.ToString());
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("Data could not be written to the CSV file.");
+                return;
+            }
+        }
+        private void ExportHeadings()
+        {
+            string[] headings =
+                {
+                    "Name",
+                    "Short",
+                    "Measerement Unit",
+                    "Value",
+                    "Description",
+                };
+            output.AppendLine(string.Join(separator, headings));
+        }
+        private void ExportBoby()
+        {
+            foreach (var item in result.TextParameters)
+            {
+                if (item.IsValid == true)
+                {
+                    string[] newLine =
+                        {
+                            item.Name,
+                            item.ShortName,
+                            item.MeasurementUnit,
+                            item.Value.ToString(),
+                            item.Description
+                        };
+                    output.AppendLine(string.Join(separator, newLine));
+                }
+            }
+        }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ExportToCSVLogic.cs b/StructureHelperLogics/NdmCalculations/Analyses/ExportToCSVLogic.cs
deleted file mode 100644
index 8138b93..0000000
--- a/StructureHelperLogics/NdmCalculations/Analyses/ExportToCSVLogic.cs
+++ /dev/null
@@ -1,75 +0,0 @@
-using StructureHelperCommon.Infrastructures.Exceptions;
-using StructureHelperCommon.Infrastructures.Strings;
-using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StructureHelperLogics.NdmCalculations.Analyses
-{
-    public class ExportToCSVLogic : IExportResultLogic
-    {
-        string filename;
-
-        public void Export(INdmResult ndmResult)
-        {
-            string separator = ";";
-            StringBuilder output = new StringBuilder();
-
-            if (ndmResult is ForcesResults)
-            {
-                var forceResults = ndmResult as ForcesResults;
-                string[] headings =
-                    {
-                    "Limit State",
-                    "Calc duration",
-                    "Mx",
-                    "My",
-                    "Nz",
-                    "kx",
-                    "ky",
-                    "epsz"
-                };
-                output.AppendLine(string.Join(separator, headings));
-                foreach (var item in forceResults.ForcesResultList)
-                {
-                    if (item.IsValid == true)
-                    {
-                        var tuple = item.DesignForceTuple.ForceTuple;
-                        var strainMatrix = item.LoaderResults.StrainMatrix;
-                        string[] newLine =
-                            {
-                            item.DesignForceTuple.LimitState.ToString(),
-                            item.DesignForceTuple.CalcTerm.ToString(),
-                            tuple.Mx.ToString(),
-                            tuple.My.ToString(),
-                            tuple.Nz.ToString(),
-                            strainMatrix.Kx.ToString(),
-                            strainMatrix.Ky.ToString(),
-                            strainMatrix.EpsZ.ToString()
-                        };
-                        output.AppendLine(string.Join(separator, newLine));
-                    }
-                }
-                try
-                {
-                    File.AppendAllText(filename, output.ToString());
-                }
-                catch (Exception ex)
-                {
-                    Console.WriteLine("Data could not be written to the CSV file.");
-                    return;
-                }
-            }
-            else throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknown +": "+ nameof(ndmResult));
-        }
-
-        public ExportToCSVLogic(string filename)
-        {
-            this.filename = filename;
-        }
-    }
-}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryCalculator.cs
new file mode 100644
index 0000000..eab28ea
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryCalculator.cs
@@ -0,0 +1,45 @@
+using LoaderCalculator.Data.Matrix;
+using LoaderCalculator.Data.Ndms;
+using StructureHelperLogics.Services.NdmPrimitives;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.Geometry
+{
+    public class GeometryCalculator : IGeometryCalculator
+    {
+        TextParametersLogic parametersLogic;
+        IGeometryResult geometryResult;
+        public string Name { get; set; }
+
+        public INdmResult Result => geometryResult;
+
+        public GeometryCalculator(IEnumerable<INdm> ndms, IStrainMatrix strainMatrix)
+        {
+            parametersLogic = new TextParametersLogic(ndms, strainMatrix);
+        }
+
+        public GeometryCalculator(TextParametersLogic parametersLogic)
+        {
+            this.parametersLogic = parametersLogic;
+        }
+
+        public void Run()
+        {
+            geometryResult = new GeometryResult() { IsValid = true };
+            geometryResult.TextParameters = parametersLogic.GetTextParameters();
+        }
+
+        public object Clone()
+        {
+            throw new NotImplementedException();
+        }
+
+
+
+
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryResult.cs b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryResult.cs
new file mode 100644
index 0000000..d347627
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/GeometryResult.cs
@@ -0,0 +1,16 @@
+using StructureHelperCommon.Models.Parameters;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.Geometry
+{
+    public class GeometryResult : IGeometryResult
+    {
+        public bool IsValid { get; set; }
+        public List<ITextParameter> TextParameters { get; set; }
+        public string Description { get; set; }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryCalculator.cs
new file mode 100644
index 0000000..23abb2f
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryCalculator.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.Geometry
+{
+    public interface IGeometryCalculator : INdmCalculator
+    {
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryResult.cs b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryResult.cs
new file mode 100644
index 0000000..61b6389
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/Geometry/IGeometryResult.cs
@@ -0,0 +1,14 @@
+using StructureHelperCommon.Models.Parameters;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.Geometry
+{
+    public interface IGeometryResult : INdmResult
+    {
+        List<ITextParameter> TextParameters { get; set; }
+    }
+}
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs b/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs
index a3d927a..9c8a10a 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs
@@ -8,6 +8,7 @@ namespace StructureHelperLogics.NdmCalculations.Analyses
 {
     public interface IExportResultLogic
     {
-        void Export(INdmResult ndmResult);
+        string FileName { get; set; }
+        void Export();
     }
 }
diff --git a/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs b/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs
index 92b8f31..b6df4c9 100644
--- a/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs
+++ b/StructureHelperLogics/Services/NdmPrimitives/TextParametersLogic.cs
@@ -27,17 +27,51 @@ namespace StructureHelperLogics.Services.NdmPrimitives
         {
             var parameters = new List<ITextParameter>();
             parameters.AddRange(GetGravityCenter(prefixInitial, ndms));
+            parameters.AddRange(GetSimpleArea(ndms));
             parameters.AddRange(GetArea(prefixInitial, ndms));
-            parameters.AddRange(GetSecondMomentOfArea(prefixInitial, ndms));
+            parameters.AddRange(GetMomentOfInertia(prefixInitial, ndms));
             parameters.AddRange(GetGravityCenter(prefixActual, ndms, strainMatrix));
             parameters.AddRange(GetArea(prefixActual, ndms, strainMatrix));
-            parameters.AddRange(GetSecondMomentOfArea(prefixActual, ndms, strainMatrix));
+            parameters.AddRange(GetMomentOfInertia(prefixActual, ndms, strainMatrix));
+            parameters.AddRange(GetAreaRatio(ndms, strainMatrix));
+            parameters.AddRange(GetMomentOfInertiaRatio(ndms, strainMatrix));
             return parameters;
         }
 
-        private IEnumerable<ITextParameter> GetSecondMomentOfArea(string prefix, IEnumerable<INdm> locNdms, IStrainMatrix? locStrainMatrix = null)
+        private IEnumerable<ITextParameter> GetSimpleArea(IEnumerable<INdm> ndms)
         {
-            const string name = "Moment of inertia";
+            const string name = "Summary Area";
+            const string shortName = "A";
+            var parameters = new List<ITextParameter>();
+            var unitArea = CommonOperation.GetUnit(UnitTypes.Area, "mm2");
+            var unitName = $"{unitArea.Name}";
+            var unitMultiPlayer = unitArea.Multiplyer;
+            var firstParameter = new TextParameter()
+            {
+                IsValid = true,
+                Name = $"{name}",
+                ShortName = $"{shortName}",
+                MeasurementUnit = unitName,
+                Description = $"{name} of cross-section without reduction"
+            };
+            try
+            {
+                firstParameter.Value = ndms.Sum(x => x.Area) * unitMultiPlayer;
+            }
+            catch (Exception ex)
+            {
+                firstParameter.IsValid = false;
+                firstParameter.Value = double.NaN;
+                firstParameter.Description += $": {ex}";
+            }
+            parameters.Add(firstParameter);
+            return parameters;
+        }
+
+        private IEnumerable<ITextParameter> GetMomentOfInertia(string prefix, IEnumerable<INdm> locNdms, IStrainMatrix? locStrainMatrix = null)
+        {
+            const string name = "Bending stiffness";
+            const string shortName = "EI";
             var parameters = new List<ITextParameter>();
             var unitArea = CommonOperation.GetUnit(UnitTypes.Area, "mm2");
             var unitStress = CommonOperation.GetUnit(UnitTypes.Stress, "MPa");
@@ -47,7 +81,7 @@ namespace StructureHelperLogics.Services.NdmPrimitives
             {
                 IsValid = true,
                 Name = $"{prefix} {name} {firstAxisName.ToUpper()}",
-                ShortName = $"I{firstAxisName}",
+                ShortName = $"{shortName}{firstAxisName}",
                 MeasurementUnit = unitName,
                 Description = $"{prefix} {name} of cross-section arbitrary {firstAxisName}-axis multiplied by {prefix} modulus"
             };
@@ -55,7 +89,7 @@ namespace StructureHelperLogics.Services.NdmPrimitives
             {
                 IsValid = true,
                 Name = $"{prefix} {name} {secondAxisName}",
-                ShortName = $"I{secondAxisName}",
+                ShortName = $"{shortName}{secondAxisName}",
                 MeasurementUnit = unitName,
                 Description = $"{prefix} {name} of cross-section arbitrary {secondAxisName}-axis multiplied by {prefix} modulus"
             };
@@ -78,9 +112,51 @@ namespace StructureHelperLogics.Services.NdmPrimitives
             parameters.Add(secondParameter);
             return parameters;
         }
-
+        private IEnumerable<ITextParameter> GetMomentOfInertiaRatio(IEnumerable<INdm> locNdms, IStrainMatrix? locStrainMatrix = null)
+        {
+            const string name = "Bending stiffness";
+            const string shortName = "EI";
+            var parameters = new List<ITextParameter>();
+            var firstParameter = new TextParameter()
+            {
+                IsValid = true,
+                Name = $"{prefixActual}/{prefixInitial} {name} {firstAxisName.ToUpper()} ratio",
+                ShortName = $"{shortName}{firstAxisName}-ratio",
+                MeasurementUnit = "-",
+                Description = $"{prefixActual}/{prefixInitial} {name} of cross-section arbitrary {firstAxisName}-axis ratio"
+            };
+            var secondParameter = new TextParameter()
+            {
+                IsValid = true,
+                Name = $"{prefixActual}/{prefixInitial} {name} {secondAxisName} ratio",
+                ShortName = $"{shortName}{secondAxisName}-ratio",
+                MeasurementUnit = "-",
+                Description = $"{prefixActual}/{prefixInitial} {name} of cross-section arbitrary {secondAxisName}-axis ratio"
+            };
+            try
+            {
+                var initialMoments = GeometryOperations.GetReducedMomentsOfInertia(locNdms);
+                var actualMoments = GeometryOperations.GetReducedMomentsOfInertia(locNdms, locStrainMatrix);
+                firstParameter.Value = actualMoments.MomentX / initialMoments.MomentX;
+                secondParameter.Value = actualMoments.MomentY / initialMoments.MomentY;
+            }
+            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)
         {
+            const string name = "Longitudinal stiffness";
+            const string shortName = "EA";
             var parameters = new List<ITextParameter>();
             var unitArea = CommonOperation.GetUnit(UnitTypes.Area, "mm2");
             var unitStress = CommonOperation.GetUnit(UnitTypes.Stress, "MPa");
@@ -89,10 +165,10 @@ namespace StructureHelperLogics.Services.NdmPrimitives
             var firstParameter = new TextParameter()
             {
                 IsValid = true,
-                Name = $"{prefix} Area",
-                ShortName = "EA",
+                Name = $"{prefix} {name}",
+                ShortName = $"{shortName}",
                 MeasurementUnit = unitName,
-                Description = $"{prefix} Area of cross-section multiplied by {prefix} modulus"
+                Description = $"{prefix} {name} of cross-section multiplied by {prefix} modulus"
             };
             try
             {
@@ -107,13 +183,39 @@ namespace StructureHelperLogics.Services.NdmPrimitives
             parameters.Add(firstParameter);
             return parameters;
         }
-
+        private IEnumerable<ITextParameter> GetAreaRatio(IEnumerable<INdm> locNdms, IStrainMatrix locStrainMatrix)
+        {
+            const string name = "Longitudinal stiffness";
+            const string shortName = "EA";
+            var parameters = new List<ITextParameter>();
+            var firstParameter = new TextParameter()
+            {
+                IsValid = true,
+                Name = $"{prefixActual}/{prefixInitial} {name} ratio",
+                ShortName = $"{shortName}-ratio",
+                MeasurementUnit = "-",
+                Description = $"{prefixActual}/{prefixInitial} {name}-ratio of cross-section"
+            };
+            try
+            {
+                var actual = GeometryOperations.GetReducedArea(locNdms, locStrainMatrix);
+                var initial = GeometryOperations.GetReducedArea(locNdms);
+                firstParameter.Value = actual / initial;
+            }
+            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>();