Index: src/Plugins/Wti/Wti.Data/PipingFailureMechanism.cs
===================================================================
diff -u -rb08cd825acc24d8d7b0f5e802bf65efece7ee4be -rb16cc39381e4275844ad330e0bc56ede52aa5b88
--- src/Plugins/Wti/Wti.Data/PipingFailureMechanism.cs	(.../PipingFailureMechanism.cs)	(revision b08cd825acc24d8d7b0f5e802bf65efece7ee4be)
+++ src/Plugins/Wti/Wti.Data/PipingFailureMechanism.cs	(.../PipingFailureMechanism.cs)	(revision b16cc39381e4275844ad330e0bc56ede52aa5b88)
@@ -14,11 +14,17 @@
         public PipingFailureMechanism()
         {
             SurfaceLines = Enumerable.Empty<PipingSurfaceLine>();
+            PipingData = new PipingData();
         }
 
         /// <summary>
         /// Gets the available surface lines within the scope of the piping failure mechanism.
         /// </summary>
         public IEnumerable<PipingSurfaceLine> SurfaceLines { get; private set; }
+
+        /// <summary>
+        /// Gets the input data which contains input and output of a piping calculation
+        /// </summary>
+        public PipingData PipingData { get; private set; }
     }
 }
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