Fix beam shear force calculator

StructureHelperCommon/Models/Materials/Libraries/MaterialFactorLogic.cs

@@ -0,0 +1,29 @@
+using StructureHelperCommon.Infrastructures.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Materials.Libraries
+{
+    public class MaterialFactorLogic : IMaterialFactorLogic
+    {
+        public List<IMaterialSafetyFactor> SafetyFactors { get; }
+        public (double Compressive, double Tensile) GetTotalFactor(LimitStates limitState, CalcTerms calcTerm)
+        {
+            double compressionVal = 1d;
+            double tensionVal = 1d;
+            foreach (var item in SafetyFactors.Where(x => x.Take == true))
+            {
+                compressionVal *= item.GetFactor(StressStates.Compression, calcTerm, limitState);
+                tensionVal *= item.GetFactor(StressStates.Tension, calcTerm, limitState);
+            }
+            return (compressionVal, tensionVal);
+        }
+        public MaterialFactorLogic(List<IMaterialSafetyFactor> safetyFactors)
+        {
+            SafetyFactors = safetyFactors;
+        }
+    }
+}