diff --git a/src/App/PropertyUnits.cpp b/src/App/PropertyUnits.cpp
index 8e3443cc01..6189e144fb 100644
--- a/src/App/PropertyUnits.cpp
+++ b/src/App/PropertyUnits.cpp
@@ -324,6 +324,18 @@ PropertyPressure::PropertyPressure()
     setUnit(Base::Unit::Pressure);
 }
 
+//**************************************************************************
+//**************************************************************************
+// PropertyStiffness
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+TYPESYSTEM_SOURCE(App::PropertyStiffness, App::PropertyQuantity)
+
+PropertyStiffness::PropertyStiffness()
+{
+    setUnit(Base::Unit::Stiffness);
+}
+
 //**************************************************************************
 //**************************************************************************
 // PropertyForce
diff --git a/src/App/PropertyUnits.h b/src/App/PropertyUnits.h
index a95a201d3f..fdc4b453f3 100644
--- a/src/App/PropertyUnits.h
+++ b/src/App/PropertyUnits.h
@@ -227,6 +227,18 @@ public:
     virtual ~PropertyPressure(){}
 };
 
+/** Stiffness property
+ * This is a property for representing stiffness. It is basically a float
+ * property. On the Gui it has a quantity like m/s^2.
+ */
+class AppExport PropertyStiffness: public PropertyQuantity
+{
+    TYPESYSTEM_HEADER();
+public:
+    PropertyStiffness(void);
+    virtual ~PropertyStiffness(){}
+};
+
 /** Force property
  * This is a property for representing acceleration. It is basically a float
  * property. On the Gui it has a quantity like m/s^2.
diff --git a/src/Base/UnitsSchemaImperial1.cpp b/src/Base/UnitsSchemaImperial1.cpp
index 3ef90398d4..fadafafe49 100644
--- a/src/Base/UnitsSchemaImperial1.cpp
+++ b/src/Base/UnitsSchemaImperial1.cpp
@@ -187,6 +187,10 @@ QString UnitsSchemaImperialDecimal::schemaTranslate(const Base::Quantity& quant,
         unitString = QString::fromLatin1("psi");
         factor = 6.894744825494;
     }
+    else if (unit == Unit::Stiffness) {
+        unitString = QString::fromLatin1("lbf/in");
+        factor = 4.448222/0.0254;
+    }
     else if (unit == Unit::Velocity) {
         unitString = QString::fromLatin1("in/min");
         factor = 25.4 / 60;
@@ -360,6 +364,10 @@ QString UnitsSchemaImperialCivil::schemaTranslate(const Base::Quantity& quant, d
             unitString = QString::fromLatin1("psi");
             factor = 6.894744825494;
     }
+    else if (unit == Unit::Stiffness) {
+        unitString = QString::fromLatin1("lbf/in");
+        factor = 4.448222/0.0254;
+    }
     else if (unit == Unit::Velocity) {
         unitString = QString::fromLatin1("mph");
         factor =  447.04;                         //1mm/sec => mph