Extract sum shear force logic

StructureHelperLogics/Models/BeamShears/Logics/ISumForceByShearLoadLogic.cs

@@ -0,0 +1,25 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Models.BeamShears
+{
+    /// <summary>
+    /// Implement logic for obtaining of summary force of action from start to end
+    /// </summary>
+    public interface ISumForceByShearLoadLogic : ILogic
+    {
+        /// <summary>
+        /// Returns summary force of action from start to end
+        /// </summary>
+        /// <param name="beamShearLoad">Source action</param>
+        /// <param name="startCoord">Coordinate of start point, m</param>
+        /// <param name="endCoord">Coordinate of end point, m</param>
+        /// <returns>Summary force, N</returns>
+        double GetSumShearForce(IBeamShearLoad beamShearLoad, double startCoord, double endCoord);
+    }
+}