Fix max spacing of stirrups

DataAccess/DTOs/DTOEntities/StirrupByDensityDTO.cs

@@ -0,0 +1,23 @@
+using Newtonsoft.Json;
+using StructureHelperLogics.Models.BeamShears;
+
+namespace DataAccess.DTOs.DTOEntities
+{
+    public class StirrupByDensityDTO : IStirrupByDensity
+    {
+        [JsonProperty("Id")]
+        public Guid Id { get; }
+        [JsonProperty("Name")]
+        public string? Name { get; set; } = string.Empty;
+        [JsonProperty("StirrupDensity")]
+        public double StirrupDensity { get; set; }
+        [JsonProperty("CompressedGap")]
+        public double CompressedGap { get; set; }
+
+
+        public object Clone()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}