diff --git a/B3ClientService/BO/Bill/GradeAndWeight/GradeAndWeight_Detail.cs b/B3ClientService/BO/Bill/GradeAndWeight/GradeAndWeight_Detail.cs
index 2193401..27d8070 100644
--- a/B3ClientService/BO/Bill/GradeAndWeight/GradeAndWeight_Detail.cs
+++ b/B3ClientService/BO/Bill/GradeAndWeight/GradeAndWeight_Detail.cs
@@ -30,5 +30,8 @@ namespace BWP.B3ClientService.BO
 
     [NonDmoProperty]
     public bool IsDeleted { get; set; }
+
+    [DbColumn(DefaultValue = 0)]
+    public bool IsDrop { get; set; }
   }
 }