diff --git a/Libraries/LoaderCalculator.dll b/Libraries/LoaderCalculator.dll
index ab9c778..e96c3f0 100644
Binary files a/Libraries/LoaderCalculator.dll and b/Libraries/LoaderCalculator.dll differ
diff --git a/StructureHelperCommon/Models/Forces/Factories/DesignForceFactory.cs b/StructureHelperCommon/Models/Forces/Factories/DesignForceFactory.cs
new file mode 100644
index 0000000..d113c67
--- /dev/null
+++ b/StructureHelperCommon/Models/Forces/Factories/DesignForceFactory.cs
@@ -0,0 +1,38 @@
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Strings;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Forces
+{
+    public enum ForceType
+    {
+        Force_zero,
+        Force_Mx50My50Nz100,
+    }
+
+    public static class DesignForceFactory
+    {
+        public static IDesignForceTuple GetDesignForce(ForceType forceType, LimitStates limitState, CalcTerms calcTerm)
+        {
+            if (forceType == ForceType.Force_zero)
+            {
+                return new DesignForceTuple(limitState, calcTerm);
+            }
+            else if (forceType == ForceType.Force_Mx50My50Nz100)
+            {
+                var tuple = new DesignForceTuple(limitState, calcTerm);
+                var forceTuple = tuple.ForceTuple;
+                forceTuple.Mx = -50e3d;
+                forceTuple.My = -50e3d;
+                forceTuple.Nz = -100e3d;
+                return tuple;
+            }
+            else throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknown);
+        }
+    }
+}
diff --git a/StructureHelperCommon/Models/Forces/Factories/ForceCombinationListFactory.cs b/StructureHelperCommon/Models/Forces/Factories/ForceCombinationListFactory.cs
new file mode 100644
index 0000000..b98a933
--- /dev/null
+++ b/StructureHelperCommon/Models/Forces/Factories/ForceCombinationListFactory.cs
@@ -0,0 +1,34 @@
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Strings;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Forces
+{
+    public enum DesignForceType
+    {
+        Suit_1,
+        Suit_2
+    }
+
+    public static class ForceCombinationListFactory
+    {
+        public static List<IDesignForceTuple> GetDesignForces(DesignForceType forceType)
+        {
+            if (forceType == DesignForceType.Suit_1)
+            {
+                var designForces = new List<IDesignForceTuple>();
+                designForces.Add(DesignForceFactory.GetDesignForce(ForceType.Force_Mx50My50Nz100, LimitStates.ULS, CalcTerms.ShortTerm));
+                designForces.Add(DesignForceFactory.GetDesignForce(ForceType.Force_Mx50My50Nz100, LimitStates.ULS, CalcTerms.LongTerm));
+                designForces.Add(DesignForceFactory.GetDesignForce(ForceType.Force_Mx50My50Nz100, LimitStates.SLS, CalcTerms.ShortTerm));
+                designForces.Add(DesignForceFactory.GetDesignForce(ForceType.Force_Mx50My50Nz100, LimitStates.SLS, CalcTerms.LongTerm));
+                return designForces;
+            }
+            else throw new StructureHelperException(ErrorStrings.ObjectTypeIsUnknown);
+        }
+    }
+}
diff --git a/StructureHelperCommon/Services/Forces/TupleService.cs b/StructureHelperCommon/Services/Forces/TupleService.cs
new file mode 100644
index 0000000..00f69a6
--- /dev/null
+++ b/StructureHelperCommon/Services/Forces/TupleService.cs
@@ -0,0 +1,54 @@
+using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Models.Shapes;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Services.Forces
+{
+    public static class TupleService
+    {
+        public static IForceTuple MoveTupleIntoPoint(IForceTuple forceTuple, IPoint2D point2D)
+        {
+            var newTuple = forceTuple.Clone() as IForceTuple;
+            newTuple.Mx += newTuple.Nz * point2D.Y;
+            newTuple.My -= newTuple.Nz * point2D.X;
+            return newTuple;
+        }
+
+        public static IForceTuple InterpolateTuples(IForceTuple startTuple, IForceTuple endTuple, double coefficient)
+        {
+            double dMx, dMy, dNz;
+            dMx = endTuple.Mx - startTuple.Mx;
+            dMy = endTuple.My - startTuple.My;
+            dNz = endTuple.Nz - startTuple.Nz;
+            return new ForceTuple()
+            {
+                Mx = startTuple.Mx + dMx * coefficient,
+                My = startTuple.My + dMy * coefficient,
+                Nz = startTuple.Nz + dNz * coefficient
+            };
+        }
+
+        public static IForceTuple InterpolateTuples(IForceTuple endTuple, double coefficient)
+        {
+            IForceTuple startTuple = new ForceTuple();
+            return InterpolateTuples(startTuple, endTuple, coefficient);
+        }
+
+        public static List<IDesignForceTuple> InterpolateDesignTuple(IDesignForceTuple endTuple, int stepCount)
+        {
+            var tuples =new List<IDesignForceTuple>();
+            double step = 1d / stepCount;
+            for (int i = 0; i <= stepCount; i++)
+            {
+                var currentTuple = InterpolateTuples(endTuple.ForceTuple, i * step);
+                var currentDesignTuple = new DesignForceTuple() { LimitState = endTuple.LimitState, CalcTerm = endTuple.CalcTerm, ForceTuple = currentTuple };
+                tuples.Add(currentDesignTuple);
+            }
+            return tuples;
+        }
+    }
+}
diff --git a/StructureHelperCommon/StructureHelperCommon.csproj b/StructureHelperCommon/StructureHelperCommon.csproj
index 8e98716..33f49bc 100644
--- a/StructureHelperCommon/StructureHelperCommon.csproj
+++ b/StructureHelperCommon/StructureHelperCommon.csproj
@@ -59,6 +59,8 @@
     <Compile Include="Infrastructures\Enums\MaterialTypes.cs" />
     <Compile Include="Models\Calculators\IHelperCalculator.cs" />
     <Compile Include="Models\Forces\DesignForceTuple.cs" />
+    <Compile Include="Models\Forces\Factories\DesignForceFactory.cs" />
+    <Compile Include="Models\Forces\Factories\ForceCombinationListFactory.cs" />
     <Compile Include="Models\Forces\ForceCombinationList.cs" />
     <Compile Include="Models\Forces\ForceTuple.cs" />
     <Compile Include="Models\Forces\IDesignForceTuple.cs" />
@@ -85,6 +87,7 @@
     <Compile Include="Models\Shapes\RectangleShape.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Services\ColorServices\ColorProcessor.cs" />
+    <Compile Include="Services\Forces\TupleService.cs" />
     <Compile Include="Services\ShapeServices\ShapeService.cs" />
     <Compile Include="Services\Units\IUnit.cs" />
     <Compile Include="Services\Units\Unit.cs" />
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/CalculatorLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/CalculatorLogic.cs
new file mode 100644
index 0000000..9a2ad9f
--- /dev/null
+++ b/StructureHelperLogics/Models/Templates/CrossSections/CalculatorLogic.cs
@@ -0,0 +1,20 @@
+using StructureHelperLogics.NdmCalculations.Analyses;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Models.Templates.CrossSections
+{
+    internal class CalculatorLogic : ICalculatorLogic
+    {
+        public IEnumerable<INdmCalculator> GetNdmCalculators()
+        {
+            var calculators = new List<INdmCalculator>();
+            calculators.Add(new ForceCalculator() { Name = "New Force Calculator"});
+            return calculators;
+        }
+    }
+}
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/ForceLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/ForceLogic.cs
new file mode 100644
index 0000000..9d078da
--- /dev/null
+++ b/StructureHelperLogics/Models/Templates/CrossSections/ForceLogic.cs
@@ -0,0 +1,22 @@
+using StructureHelperCommon.Models.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Models.Templates.CrossSections
+{
+    internal class ForceLogic : IForceLogic
+    {
+        public IEnumerable<IForceCombinationList> GetCombinationList()
+        {
+            var combinations = new List<IForceCombinationList>();
+            var combination = new ForceCombinationList() { Name = "New Force Action"};
+            combination.DesignForces.Clear();
+            combination.DesignForces.AddRange(ForceCombinationListFactory.GetDesignForces(DesignForceType.Suit_1));
+            combinations.Add(combination);
+            return combinations;
+        }
+    }
+}
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/ISectionGeometryLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/ISectionGeometryLogic.cs
index aabbdd9..1a8c150 100644
--- a/StructureHelperLogics/Models/Templates/CrossSections/ISectionGeometryLogic.cs
+++ b/StructureHelperLogics/Models/Templates/CrossSections/ISectionGeometryLogic.cs
@@ -7,7 +7,7 @@ using System.Threading.Tasks;
 
 namespace StructureHelperLogics.Models.Templates.CrossSections
 {
-    internal interface ISectionGeometryLogic
+    public interface ISectionGeometryLogic
     {
         IEnumerable<INdmPrimitive> GetNdmPrimitives();
     }
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/RCs/IRCGeometryLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/RCs/IRCGeometryLogic.cs
new file mode 100644
index 0000000..687afd8
--- /dev/null
+++ b/StructureHelperLogics/Models/Templates/CrossSections/RCs/IRCGeometryLogic.cs
@@ -0,0 +1,14 @@
+using StructureHelper.Models.Materials;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Models.Templates.CrossSections.RCs
+{
+    public interface IRCGeometryLogic : ISectionGeometryLogic
+    {
+        IEnumerable<IHeadMaterial> HeadMaterials { get; set; }
+    }
+}
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/RCs/MaterialLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/RCs/MaterialLogic.cs
new file mode 100644
index 0000000..cd76681
--- /dev/null
+++ b/StructureHelperLogics/Models/Templates/CrossSections/RCs/MaterialLogic.cs
@@ -0,0 +1,26 @@
+using StructureHelper.Models.Materials;
+using StructureHelperCommon.Infrastructures.Settings;
+using StructureHelperLogics.Models.Materials;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Models.Templates.CrossSections.RCs
+{
+    internal class MaterialLogic : IMaterialLogic
+    {
+        public IEnumerable<IHeadMaterial> GetHeadMaterials()
+        {
+            var result = new List<IHeadMaterial>();
+            var concrete = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Concrete40, ProgramSetting.CodeType);
+            concrete.Name = "Concrete";
+            result.Add(concrete);
+            var reinforcement = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Reinforecement400, ProgramSetting.CodeType);
+            reinforcement.Name = "Reinforcement";
+            result.Add(reinforcement);
+            return result;
+        }
+    }
+}
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/RCs/RectGeometryLogic.cs b/StructureHelperLogics/Models/Templates/CrossSections/RCs/RectGeometryLogic.cs
new file mode 100644
index 0000000..2910820
--- /dev/null
+++ b/StructureHelperLogics/Models/Templates/CrossSections/RCs/RectGeometryLogic.cs
@@ -0,0 +1,106 @@
+using StructureHelper.Models.Materials;
+using StructureHelperCommon.Models.Shapes;
+using StructureHelperLogics.Models.Primitives;
+using StructureHelperLogics.Models.Templates.RCs;
+using StructureHelperLogics.NdmCalculations.Primitives;
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Models.Templates.CrossSections.RCs
+{
+    public class RectGeometryLogic : IRCGeometryLogic
+    {
+        RectangleBeamTemplate template;
+        IHeadMaterial concrete => HeadMaterials.ToList()[0];
+        IHeadMaterial reinforcement => HeadMaterials.ToList()[1];
+
+        RectangleShape rect => template.Shape as RectangleShape;
+        double width => rect.Width;
+        double height => rect.Height;
+        double area1 => Math.PI * template.BottomDiameter * template.BottomDiameter / 4d;
+        double area2 => Math.PI * template.TopDiameter * template.TopDiameter / 4d;
+        double gap => template.CoverGap;
+
+        public IEnumerable<IHeadMaterial> HeadMaterials { get; set; }
+
+        public RectGeometryLogic(RectangleBeamTemplate template)
+        {
+            this.template = template;
+        }
+
+        public IEnumerable<INdmPrimitive> GetNdmPrimitives()
+        {
+            List<INdmPrimitive> primitives = new List<INdmPrimitive>();
+            primitives.AddRange(GetConcretePrimitives());
+            primitives.AddRange(GetCornerReinfrocementPrimitives());
+            if (template.WidthCount > 2 || template.HeightCount > 2)
+            {
+                primitives.AddRange(GetMiddleReinfrocementPrimitives());
+            }          
+            return primitives;
+        }
+
+        private IEnumerable<INdmPrimitive> GetConcretePrimitives()
+        {
+            List<INdmPrimitive> primitives = new List<INdmPrimitive>();
+            var rectangle = new RectanglePrimitive(concrete) { Width = width, Height = height, Name = "Concrete block" };
+            primitives.Add(rectangle);
+            return primitives;
+        }
+
+        private IEnumerable<INdmPrimitive> GetCornerReinfrocementPrimitives()
+        {
+            double[] xs = new double[] { -width / 2 + gap, width / 2 - gap };
+            double[] ys = new double[] { -height / 2 + gap, height / 2 - gap };
+
+            List<INdmPrimitive> primitives = new List<INdmPrimitive>();
+            var point = new PointPrimitive(reinforcement) { CenterX = xs[0], CenterY = ys[0], Area = area1, Name = "Left bottom point" };
+            primitives.Add(point);
+            point = new PointPrimitive(reinforcement) { CenterX = xs[1], CenterY = ys[0], Area = area1, Name = "Right bottom point" };
+            primitives.Add(point);
+            point = new PointPrimitive(reinforcement) { CenterX = xs[0], CenterY = ys[1], Area = area2, Name = "Left top point" };
+            primitives.Add(point);
+            point = new PointPrimitive(reinforcement) { CenterX = xs[1], CenterY = ys[1], Area = area2, Name = "Right top point" };
+            primitives.Add(point);
+            return primitives;
+        }
+
+        private IEnumerable<INdmPrimitive> GetMiddleReinfrocementPrimitives()
+        {
+            double[] xs = new double[] { -width / 2 + gap, width / 2 - gap };
+            double[] ys = new double[] { -height / 2 + gap, height / 2 - gap };
+
+            List<INdmPrimitive> primitives = new List<INdmPrimitive>();
+            IPointPrimitive point;
+            if (template.WidthCount > 2)
+            {
+                int count = template.WidthCount - 1;
+                double dist = (xs[1] - xs[0]) / count;
+                for (int i = 1; i < count; i++)
+                {
+                    point = new PointPrimitive(reinforcement) { CenterX = xs[0] + dist * i, CenterY = ys[0], Area = area1, Name = $"Bottom point {i}" };
+                    primitives.Add(point);
+                    point = new PointPrimitive(reinforcement) { CenterX = xs[0] + dist * i, CenterY = ys[1], Area = area2, Name = $"Top point {i}" };
+                    primitives.Add(point);
+                }
+            }
+            if (template.HeightCount > 2)
+            {
+                int count = template.HeightCount - 1;
+                double dist = (ys[1] - ys[0]) / count;
+                for (int i = 1; i < count; i++)
+                {
+                    point = new PointPrimitive(reinforcement) { CenterX = xs[0], CenterY = ys[0] + dist * i, Area = area1, Name = $"Left point {i}" };
+                    primitives.Add(point);
+                    point = new PointPrimitive(reinforcement) { CenterX = xs[1], CenterY = ys[0] + dist * i, Area = area1, Name = $"Right point {i}" };
+                    primitives.Add(point);
+                }
+            }
+            return primitives;
+        }
+    }
+}
diff --git a/StructureHelperLogics/Models/Templates/CrossSections/RCs/RCSectionTemplate.cs b/StructureHelperLogics/Models/Templates/CrossSections/RCs/SectionTemplate.cs
similarity index 73%
rename from StructureHelperLogics/Models/Templates/CrossSections/RCs/RCSectionTemplate.cs
rename to StructureHelperLogics/Models/Templates/CrossSections/RCs/SectionTemplate.cs
index 92b2070..9553bdb 100644
--- a/StructureHelperLogics/Models/Templates/CrossSections/RCs/RCSectionTemplate.cs
+++ b/StructureHelperLogics/Models/Templates/CrossSections/RCs/SectionTemplate.cs
@@ -1,6 +1,7 @@
 using StructureHelperCommon.Infrastructures.Interfaces;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperLogics.Models.CrossSections;
+using StructureHelperLogics.Models.Templates.RCs;
 using StructureHelperLogics.NdmCalculations.Analyses;
 using StructureHelperLogics.NdmCalculations.Primitives;
 using System;
@@ -9,36 +10,45 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace StructureHelperLogics.Models.Templates.CrossSections
+namespace StructureHelperLogics.Models.Templates.CrossSections.RCs
 {
-    public class RCSectionTemplate : ICrossSectionTemplate
+    public class SectionTemplate : ICrossSectionTemplate
     {
         IForceLogic forceLogic;
         IMaterialLogic materialLogic;
-        ISectionGeometryLogic geometryLogic;
+        IRCGeometryLogic geometryLogic;
         ICalculatorLogic calculatorLogic;
         IEnumerable<INdmPrimitive> primitives;
         IEnumerable<IForceCombinationList> combinations;
         IEnumerable<INdmCalculator> calculators;
 
+        public SectionTemplate(IRCGeometryLogic geometryLogic)
+        {
+            this.geometryLogic = geometryLogic;
+            materialLogic = new MaterialLogic();
+            forceLogic = new ForceLogic();
+            calculatorLogic = new CalculatorLogic();
+        }
+
         public ICrossSection GetCrossSection()
         {
             ICrossSection section = new CrossSection();
             var repository = section.SectionRepository;
             var materials = materialLogic.GetHeadMaterials();
+            geometryLogic.HeadMaterials = materials;
             primitives = geometryLogic.GetNdmPrimitives();
             repository.HeadMaterials.AddRange(materials);
             repository.Primitives.AddRange(primitives);
             combinations = forceLogic.GetCombinationList();
             repository.ForceCombinationLists.AddRange(combinations);
             calculators = calculatorLogic.GetNdmCalculators();
-            ProcessCalculatorsSetForce();
-            ProcessCalculatorsSetPrimitives();
+            AddAllForcesToCalculators();
+            AddAllPrimitivesToCalculator();
             repository.CalculatorsList.AddRange(calculators);
             return section;
         }
 
-        private void ProcessCalculatorsSetForce()
+        private void AddAllForcesToCalculators()
         {
             foreach (var calculator in calculators)
             {
@@ -49,7 +59,7 @@ namespace StructureHelperLogics.Models.Templates.CrossSections
                 }
             }
         }
-        private void ProcessCalculatorsSetPrimitives()
+        private void AddAllPrimitivesToCalculator()
         {
             foreach (var calculator in calculators)
             {
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
index 7488383..a8aaa7f 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/ForceCalculator.cs
@@ -1,20 +1,16 @@
-using LoaderCalculator.Data.Matrix;
+using LoaderCalculator;
+using LoaderCalculator.Data.Matrix;
 using LoaderCalculator.Data.Ndms;
 using LoaderCalculator.Data.SourceData;
-using LoaderCalculator;
 using StructureHelperCommon.Infrastructures.Enums;
 using StructureHelperCommon.Models.Forces;
-using StructureHelperLogics.Models.Calculations.CalculationProperties;
+using StructureHelperCommon.Models.Shapes;
+using StructureHelperCommon.Services.Forces;
 using StructureHelperLogics.NdmCalculations.Primitives;
-using StructureHelperLogics.NdmCalculations.Triangulations;
 using StructureHelperLogics.Services.NdmPrimitives;
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Threading;
-using System.Text;
-using StructureHelperCommon.Models.Shapes;
-using StructureHelperLogics.Services.Forces;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 {
@@ -126,12 +122,25 @@ namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
             catch (Exception ex)
             {
                 var result = new ForcesResult() { IsValid = false };
-                if (ex.Message == "") { result.Desctription = "Stiffness matrix is equal to zero"; }
+                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}"; }
                 return result;
             }
 
         }
 
+        public object Clone()
+        {
+            IForceCalculator calculator = new ForceCalculator();
+            calculator.LimitStatesList.Clear();
+            calculator.LimitStatesList.AddRange(LimitStatesList);
+            calculator.CalcTermsList.Clear();
+            calculator.CalcTermsList.AddRange(CalcTermsList);
+            calculator.IterationAccuracy = IterationAccuracy;
+            calculator.MaxIterationCount = MaxIterationCount;
+            calculator.Primitives.AddRange(Primitives);
+            calculator.ForceCombinationLists.AddRange(ForceCombinationLists);
+            return calculator;
+        }
     }
 }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs
index fa2348c..b627f0a 100644
--- a/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs
+++ b/StructureHelperLogics/NdmCalculations/Analyses/ByForces/IForceCalculator.cs
@@ -2,11 +2,12 @@
 using StructureHelperCommon.Infrastructures.Interfaces;
 using StructureHelperCommon.Models.Forces;
 using StructureHelperLogics.NdmCalculations.Primitives;
+using System;
 using System.Collections.Generic;
 
 namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
 {
-    public interface IForceCalculator : INdmCalculator, IHasPrimitives, IHasForceCombinations
+    public interface IForceCalculator : INdmCalculator, IHasPrimitives, IHasForceCombinations, ICloneable
     {
         List<CalcTerms> CalcTermsList { get; }
         double IterationAccuracy { get; set; }
diff --git a/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs b/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs
new file mode 100644
index 0000000..6599e39
--- /dev/null
+++ b/StructureHelperLogics/NdmCalculations/Analyses/IExportResultLogic.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses
+{
+    internal interface IExportResultLogic
+    {
+        void Export(INdmResult ndmResult);
+    }
+}
diff --git a/StructureHelperLogics/Services/Forces/TupleService.cs b/StructureHelperLogics/Services/Forces/TupleService.cs
deleted file mode 100644
index c47d064..0000000
--- a/StructureHelperLogics/Services/Forces/TupleService.cs
+++ /dev/null
@@ -1,21 +0,0 @@
-using StructureHelperCommon.Models.Forces;
-using StructureHelperCommon.Models.Shapes;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StructureHelperLogics.Services.Forces
-{
-    internal static class TupleService
-    {
-        public static IForceTuple MoveTupleIntoPoint(IForceTuple forceTuple, IPoint2D point2D)
-        {
-            var newTuple = forceTuple.Clone() as IForceTuple;
-            newTuple.Mx += newTuple.Nz * point2D.Y;
-            newTuple.My -= newTuple.Nz * point2D.X;
-            return newTuple;
-        }
-    }
-}
diff --git a/StructureHelperLogics/Services/NdmCalculations/InterpolateService.cs b/StructureHelperLogics/Services/NdmCalculations/InterpolateService.cs
new file mode 100644
index 0000000..4584d1c
--- /dev/null
+++ b/StructureHelperLogics/Services/NdmCalculations/InterpolateService.cs
@@ -0,0 +1,39 @@
+using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Services.Forces;
+using StructureHelperLogics.Models.Primitives;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Services.NdmCalculations
+{
+    public static class InterpolateService
+    {
+        public static IForceCalculator InterpolateForceCalculator(IForceCalculator source, IDesignForceTuple sourceTuple, int stepCount)
+        {
+            IForceCalculator calculator = new ForceCalculator();
+            calculator.LimitStatesList.Clear();
+            calculator.LimitStatesList.Add(sourceTuple.LimitState);
+            calculator.CalcTermsList.Clear();
+            calculator.CalcTermsList.Add(sourceTuple.CalcTerm);
+            calculator.IterationAccuracy = source.IterationAccuracy;
+            calculator.MaxIterationCount = source.MaxIterationCount;
+            calculator.Primitives.AddRange(source.Primitives);
+            calculator.ForceCombinationLists.Clear();
+            var combination = new ForceCombinationList()
+            {
+                Name = "New combination",
+                SetInGravityCenter = false
+            };
+            combination.DesignForces.Clear();
+            combination.DesignForces.AddRange(TupleService.InterpolateDesignTuple(sourceTuple, stepCount));
+            combination.ForcePoint.X = 0;
+            combination.ForcePoint.Y = 0;
+            calculator.ForceCombinationLists.Add(combination);
+            return calculator;
+        }
+    }
+}
diff --git a/StructureHelperLogics/StructureHelperLogics.csproj b/StructureHelperLogics/StructureHelperLogics.csproj
index 94ed563..ef0f54a 100644
--- a/StructureHelperLogics/StructureHelperLogics.csproj
+++ b/StructureHelperLogics/StructureHelperLogics.csproj
@@ -19,6 +19,8 @@
 
   <ItemGroup>
     <Folder Include="Infrastructures\" />
+    <Folder Include="Services\CrossSections\" />
+    <Folder Include="Services\Forces\" />
   </ItemGroup>
 
 </Project>
\ No newline at end of file
diff --git a/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml b/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
index 58e2304..d840d9c 100644
--- a/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
+++ b/Windows/CalculationWindows/CalculatorsViews/ForceCalculatorViews/ForcesResultsView.xaml
@@ -7,7 +7,7 @@
         xmlns:vm="clr-namespace:StructureHelper.Windows.ViewModels.Calculations.Calculators"
         d:DataContext="{d:DesignInstance vm:ForcesResultsViewModel}"
         mc:Ignorable="d"
-        Title="ForceResultsView" Height="350" Width="650" MinHeight="300" MinWidth="400">
+        Title="ForceResultsView" Height="350" Width="650" MinHeight="300" MinWidth="400" WindowStartupLocation="CenterScreen">
     <Grid>
         <Grid.ColumnDefinitions>
             <ColumnDefinition/>
@@ -40,7 +40,8 @@
         </DataGrid>
         <StackPanel Grid.Column="1">
             <Button Margin="3" Content="Graphic" Command="{Binding ShowIsoFieldCommand}"/>
-            <Button Margin="3" Content="Export" Command="{Binding ShowIsoFieldCommand}"/>
+            <Button Margin="3" Content="Interpolate" Command="{Binding InterpolateCommand}"/>
+            <Button Margin="3" Content="Export" Command="{Binding ExportToCSVCommand}"/>
         </StackPanel>
     </Grid>
 </Window>
diff --git a/Windows/MainWindow/MainView.xaml b/Windows/MainWindow/MainView.xaml
index c8c5b2b..5915f71 100644
--- a/Windows/MainWindow/MainView.xaml
+++ b/Windows/MainWindow/MainView.xaml
@@ -44,7 +44,6 @@
                     <Button Content="Delete primitive" Command="{Binding DeletePrimitive}"/>
                 </MenuItem>
                 <Button Content="Materials" Command="{Binding EditHeadMaterialsCommand}"/>
-                <Button Content="Calculation properties" Command="{Binding Path=EditCalculationPropertyCommand}"/>
                 <Button Content="Move primitives to center" Command="{Binding Path=MovePrimitiveToGravityCenterCommand}"/>
                 <MenuItem Header="Templates">
                     <Button Content="Concrete beam" Command="{Binding AddBeamCase}"/>
@@ -52,9 +51,10 @@
                     <Button Content="Concrete slab" Command="{Binding AddSlabCase}"/>
                 </MenuItem>
             </MenuItem>
-            <MenuItem Header="Analysis">
-                <Button Content="Solve problem" Command="{Binding Path=Calculate}"/>
+            <!--<MenuItem Header="Analysis">
             </MenuItem>
+            <MenuItem Header="Help">
+            </MenuItem>-->
         </Menu>
         <Grid Grid.Row="1">
             <Grid.ColumnDefinitions>
diff --git a/Windows/MainWindow/MainViewModel.cs b/Windows/MainWindow/MainViewModel.cs
index 124983b..b290667 100644
--- a/Windows/MainWindow/MainViewModel.cs
+++ b/Windows/MainWindow/MainViewModel.cs
@@ -9,7 +9,6 @@ using StructureHelper.Models.Primitives.Factories;
 using StructureHelper.Windows.CalculationWindows.CalculationPropertyWindow;
 using StructureHelper.Windows.CalculationWindows.CalculationResultWindow;
 using StructureHelper.Windows.ColorPickerWindow;
-using StructureHelper.Windows.Forces;
 using StructureHelper.Windows.MainWindow.Materials;
 using StructureHelper.Windows.PrimitiveProperiesWindow;
 using StructureHelper.Windows.PrimitiveTemplates.RCs.RectangleBeam;
@@ -24,6 +23,7 @@ using StructureHelperLogics.Models.Calculations.CalculationProperties;
 using StructureHelperLogics.Models.CrossSections;
 using StructureHelperLogics.Models.Materials;
 using StructureHelperLogics.Models.Primitives;
+using StructureHelperLogics.Models.Templates.CrossSections.RCs;
 using StructureHelperLogics.Models.Templates.RCs;
 using StructureHelperLogics.NdmCalculations.Primitives;
 using StructureHelperLogics.Services.NdmCalculations;
@@ -342,7 +342,6 @@ namespace StructureHelper.Windows.MainWindow
                     repository.Primitives.Add(ndmPrimitive);
                 }
                 OnPropertyChanged(nameof(PrimitivesCount));
-                AddCaseLoads(-50e3d, 50e3d, 0d);
             });
 
             AddColumnCase = new RelayCommand(o =>
@@ -354,7 +353,6 @@ namespace StructureHelper.Windows.MainWindow
                     repository.Primitives.Add(ndmPrimitive);
                 }
                 OnPropertyChanged(nameof(PrimitivesCount));
-                AddCaseLoads(50e3d, 50e3d, -100e3d);
             });
 
             AddSlabCase = new RelayCommand(o =>
@@ -366,7 +364,6 @@ namespace StructureHelper.Windows.MainWindow
                     repository.Primitives.Add(ndmPrimitive);
                 }
                 OnPropertyChanged(nameof(PrimitivesCount));
-                AddCaseLoads(-20e3d, 0d, 0d);
             });
 
             Calculate = new RelayCommand(o =>
@@ -507,28 +504,25 @@ namespace StructureHelper.Windows.MainWindow
             var view = new CalculationPropertyView(viewModel);
             view.ShowDialog();
         }
-        private void AddCaseLoads(double mx, double my, double nz)
-        {
-            ForceCombination combination = new ForceCombination();
-            combination.ForceMatrix.Mx = mx;
-            combination.ForceMatrix.My = my;
-            combination.ForceMatrix.Nz = nz;
-            calculationProperty.ForceCombinations.Add(combination);     
-        }
+
         private IEnumerable<PrimitiveBase> GetCasePrimitives(RectangleBeamTemplate template)
         {
             var wnd = new RectangleBeamView(template);
             wnd.ShowDialog();
             if (wnd.DialogResult == true)
             {
-                var concrete = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Concrete40, ProgramSetting.CodeType);
-                concrete.Name = "Concrete";
-                var reinforcement = HeadMaterialFactory.GetHeadMaterial(HeadmaterialType.Reinforecement400, ProgramSetting.CodeType);
-                reinforcement.Name = "Reinforcement";
-                Model.Section.SectionRepository.HeadMaterials.Add(concrete);
-                Model.Section.SectionRepository.HeadMaterials.Add(reinforcement);
+                var newSection = new SectionTemplate(new RectGeometryLogic(template)).GetCrossSection();
+                var newRepository = newSection.SectionRepository;
+                repository.HeadMaterials.AddRange(newRepository.HeadMaterials);
+                repository.Primitives.AddRange(newRepository.Primitives);
+                repository.ForceCombinationLists.AddRange(newRepository.ForceCombinationLists);
+                repository.CalculatorsList.AddRange(newRepository.CalculatorsList);
                 OnPropertyChanged(nameof(HeadMaterials));
-                var primitives = PrimitiveFactory.GetRectangleRCElement(template, concrete, reinforcement);
+                CombinationsLogic.AddItems(newRepository.ForceCombinationLists);
+                CalculatorsLogic.AddItems(newRepository.CalculatorsList);
+                //OnPropertyChanged(nameof(CombinationsLogic.Items));
+                //OnPropertyChanged(nameof(CalculatorsLogic.Items));
+                var primitives = PrimitiveOperations.ConvertNdmPrimitivesToPrimitiveBase(newRepository.Primitives);
                 foreach (var item in primitives)
                 {
                     item.RegisterDeltas(CanvasWidth / 2, CanvasHeight / 2);
diff --git a/Windows/ViewModels/Calculations/CalculationResult/CalculationResultViewModel.cs b/Windows/ViewModels/Calculations/CalculationResult/CalculationResultViewModel.cs
index 512989f..1145ff7 100644
--- a/Windows/ViewModels/Calculations/CalculationResult/CalculationResultViewModel.cs
+++ b/Windows/ViewModels/Calculations/CalculationResult/CalculationResultViewModel.cs
@@ -15,19 +15,27 @@ using System.Windows.Input;
 
 namespace StructureHelper.Windows.ViewModels.Calculations.CalculationResult
 {
-    public class CalculationResultViewModel
+    public class CalculationResultViewModel : ViewModelBase
     {
         public ICalculationResult SelectedResult { get; set; }
-        public ICommand ShowIsoFieldCommand { get;}
         private ObservableCollection<ICalculationResult> calculationResults;
         private IEnumerable<INdm> ndms;
         private IReport isoFieldReport;
+        private RelayCommand showIsoFieldCommand;
 
+        public RelayCommand ShowIsoFieldCommand
+        { get
+            {
+                return showIsoFieldCommand ??
+                    (
+                    showIsoFieldCommand = new RelayCommand(o =>
+                    ShowIsoField(),
+                    o => !(SelectedResult is null) && SelectedResult.IsValid));
+            }
+        }
 
         public CalculationResultViewModel(IEnumerable<ICalculationResult> results, IEnumerable<INdm> ndmCollection)
         {
-            ShowIsoFieldCommand = new RelayCommand(o=>ShowIsoField(), o=> !(SelectedResult is null) && SelectedResult.IsValid);
-            //
             calculationResults = new ObservableCollection<ICalculationResult>();
             ndms = ndmCollection;
             foreach (var result in results)
diff --git a/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs b/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
index 6c62c1b..f801e82 100644
--- a/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
+++ b/Windows/ViewModels/Calculations/Calculators/ForcesResultsViewModel.cs
@@ -6,14 +6,17 @@ using StructureHelper.Infrastructure.UI.DataContexts;
 using StructureHelper.Services.Reports;
 using StructureHelper.Services.Reports.CalculationReports;
 using StructureHelper.Services.ResultViewers;
+using StructureHelper.Windows.CalculationWindows.CalculatorsViews.ForceCalculatorViews;
 using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
 using StructureHelperLogics.NdmCalculations.Primitives;
+using StructureHelperLogics.Services.NdmCalculations;
 using StructureHelperLogics.Services.NdmPrimitives;
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Windows.Forms;
 using System.Windows.Input;
 
 namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
@@ -27,26 +30,69 @@ namespace StructureHelper.Windows.ViewModels.Calculations.Calculators
         private IReport isoFieldReport;
 
         public ForcesResult SelectedResult { get; set; }
-        private ICommand showIsoFieldCommand;
+        private RelayCommand showIsoFieldCommand;
+        private RelayCommand exportToCSVCommand;
+        private RelayCommand interpolateCommand;
 
         public IForcesResults ForcesResults
         {
             get => forcesResults;
         }
 
-        public ICommand ShowIsoFieldCommand
+        public RelayCommand ShowIsoFieldCommand
         {
             get
             {
                 return showIsoFieldCommand ??
-                (
-                showIsoFieldCommand = new RelayCommand(o =>
+                (showIsoFieldCommand = new RelayCommand(o =>
                 {
                     GetNdms();
                     ShowIsoField();
                 }, o => (SelectedResult != null) && SelectedResult.IsValid));
             }
-                
+        }
+
+        public RelayCommand ExportToCSVCommand
+        {
+            get
+            {
+                return exportToCSVCommand ??
+                    (exportToCSVCommand = new RelayCommand(o =>
+                    {
+
+                    }
+                    ));
+            }
+        }
+
+        public RelayCommand InterpolateCommand
+        {
+            get
+            {
+                return interpolateCommand ??
+                    (interpolateCommand = new RelayCommand(o =>
+                    {
+                        Interpolate();
+                    }, o => SelectedResult != null));
+            }
+        }
+
+        private void Interpolate()
+        {
+            int stepCount = 100;
+            var calculator = InterpolateService.InterpolateForceCalculator(forceCalculator, SelectedResult.DesignForceTuple, stepCount);
+            calculator.Run();
+            var result = calculator.Result;
+            if (result is null || result.IsValid == false)
+            {
+                MessageBox.Show(result.Desctription, "Check data for analisys", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+            }
+            else
+            {
+                var vm = new ForcesResultsViewModel(calculator);
+                var wnd = new ForceResultsView(vm);
+                wnd.Show();
+            }
         }
 
         public ForcesResultsViewModel(IForceCalculator forceCalculator)
diff --git a/Windows/ViewModels/ICRUDViewModel.cs b/Windows/ViewModels/ICRUDViewModel.cs
index 385cc7c..16fb247 100644
--- a/Windows/ViewModels/ICRUDViewModel.cs
+++ b/Windows/ViewModels/ICRUDViewModel.cs
@@ -16,5 +16,7 @@ namespace StructureHelper.Windows.ViewModels
         RelayCommand Add { get; }
         RelayCommand Delete { get; }
         RelayCommand Edit { get; }
+        RelayCommand Copy { get; }
+        void AddItems(IEnumerable<TItem> items);
     }
 }
diff --git a/Windows/ViewModels/NdmCrossSections/CalculatorsViewModelLogic.cs b/Windows/ViewModels/NdmCrossSections/CalculatorsViewModelLogic.cs
index 8434d4f..645275c 100644
--- a/Windows/ViewModels/NdmCrossSections/CalculatorsViewModelLogic.cs
+++ b/Windows/ViewModels/NdmCrossSections/CalculatorsViewModelLogic.cs
@@ -1,6 +1,7 @@
 using StructureHelper.Infrastructure;
 using StructureHelper.Windows.CalculationWindows.CalculatorsViews.ForceCalculatorViews;
 using StructureHelper.Windows.ViewModels.Calculations.Calculators;
+using StructureHelperCommon.Models.Forces;
 using StructureHelperLogics.Models.CrossSections;
 using StructureHelperLogics.NdmCalculations.Analyses;
 using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
@@ -18,18 +19,7 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
         private readonly ICrossSectionRepository repository;
 
         public INdmCalculator SelectedItem { get; set; }
-        public ObservableCollection<INdmCalculator> Items
-        {
-            get
-            {
-                var collection = new ObservableCollection<INdmCalculator>();
-                foreach (var item in repository.CalculatorsList)
-                {
-                    collection.Add(item);
-                }
-                return collection;
-            }
-        }
+        public ObservableCollection<INdmCalculator> Items { get; private set; }
 
         private RelayCommand addCalculatorCommand;
         public RelayCommand Add
@@ -48,6 +38,7 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
         private void AddCalculator()
         {
             var item = new ForceCalculator() { Name = "New force calculator" };
+            Items.Add(item);
             repository.CalculatorsList.Add(item);
         }
         private RelayCommand editCalculatorCommand;
@@ -115,6 +106,8 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
             }
         }
 
+        public RelayCommand Copy => throw new NotImplementedException();
+
         private void DeleteCalculator()
         {
             var dialogResult = MessageBox.Show("Delete calculator?", "Please, confirm deleting", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
@@ -124,9 +117,20 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
                 OnPropertyChanged(nameof(Items));
             }
         }
+
+        public void AddItems(IEnumerable<INdmCalculator> items)
+        {
+            foreach (var item in items)
+            {
+                Items.Add(item);
+            }
+        }
+
         public CalculatorsViewModelLogic(ICrossSectionRepository repository)
         {
             this.repository = repository;
+            Items = new ObservableCollection<INdmCalculator>();
+            AddItems(this.repository.CalculatorsList);
         }
     }
 }
diff --git a/Windows/ViewModels/NdmCrossSections/ForceCombinationViewModelLogic.cs b/Windows/ViewModels/NdmCrossSections/ForceCombinationViewModelLogic.cs
index 6809cf8..c104eb4 100644
--- a/Windows/ViewModels/NdmCrossSections/ForceCombinationViewModelLogic.cs
+++ b/Windows/ViewModels/NdmCrossSections/ForceCombinationViewModelLogic.cs
@@ -20,18 +20,7 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
 
         public IForceCombinationList SelectedItem { get; set; }
 
-        public ObservableCollection<IForceCombinationList> Items
-        {
-            get
-            {
-                var collection = new ObservableCollection<IForceCombinationList>();
-                foreach (var item in repository.ForceCombinationLists)
-                {
-                    collection.Add(item);
-                }
-                return collection;
-            }
-        }
+        public ObservableCollection<IForceCombinationList> Items { get; private set; }
 
         private RelayCommand addForceCombinationCommand;
         public RelayCommand Add
@@ -50,6 +39,7 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
         private void AddCombination()
         {
             var item = new ForceCombinationList() { Name = "New Force Combination" };
+            Items.Add(item);
             repository.ForceCombinationLists.Add(item);
         }
         private RelayCommand deleteForceCombinationCommand;
@@ -88,15 +78,28 @@ namespace StructureHelper.Windows.ViewModels.NdmCrossSections
                     }, o => SelectedItem != null));
             }
         }
+
+        public RelayCommand Copy => throw new NotImplementedException();
+
         private void EditForceCombination()
         {
             var wnd = new ForceCombinationView(SelectedItem);
             wnd.ShowDialog();
         }
 
+        public void AddItems(IEnumerable<IForceCombinationList> items)
+        {
+            foreach (var item in items)
+            {
+                Items.Add(item);
+            }
+        }
+
         public ForceCombinationViewModelLogic(ICrossSectionRepository repository)
         { 
             this.repository = repository;
+            Items = new ObservableCollection<IForceCombinationList>();
+            AddItems(this.repository.ForceCombinationLists);
         }
     }
 }