Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Forms/PropertyClasses/StabilityPointStructuresFailureMechanismProperties.cs
===================================================================
diff -u -racbfe5601241d7e7e0470194aab84b9425621d54 -rfab6b7bea64540c3fb4c9abd0f825e1d8c71e4f6
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Forms/PropertyClasses/StabilityPointStructuresFailureMechanismProperties.cs	(.../StabilityPointStructuresFailureMechanismProperties.cs)	(revision acbfe5601241d7e7e0470194aab84b9425621d54)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Forms/PropertyClasses/StabilityPointStructuresFailureMechanismProperties.cs	(.../StabilityPointStructuresFailureMechanismProperties.cs)	(revision fab6b7bea64540c3fb4c9abd0f825e1d8c71e4f6)
@@ -47,6 +47,7 @@
         private const int modelFactorStorageVolumePropertyIndex = 8;
         private const int modelFactorCollisionLoadPropertyIndex = 9;
         private const int modelFactorLoadEffectPropertyIndex = 10;
+        private const int modelFactorLongThresholdPropertyIndex = 11;
 
         /// <summary>
         /// Creates a new instance of <see cref="StabilityPointStructuresFailureMechanismProperties"/>.
@@ -99,7 +100,8 @@
                    || nameof(GravitationalAcceleration).Equals(propertyName)
                    || nameof(ModelFactorStorageVolume).Equals(propertyName)
                    || nameof(ModelFactorCollisionLoad).Equals(propertyName)
-                   || nameof(ModelFactorLoadEffect).Equals(propertyName);
+                   || nameof(ModelFactorLoadEffect).Equals(propertyName)
+                   || nameof(ModelFactorLongThreshold).Equals(propertyName);
         }
 
         #region General
@@ -224,6 +226,20 @@
             }
         }
 
+        [DynamicVisible]
+        [PropertyOrder(modelFactorLongThresholdPropertyIndex)]
+        [TypeConverter(typeof(ExpandableObjectConverter))]
+        [ResourcesCategory(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.Categories_ModelSettings))]
+        [ResourcesDisplayName(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.StructuresInputFailureMechanismContext_ModelFactorLongThreshold_DisplayName))]
+        [ResourcesDescription(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.StructuresInputFailureMechanismContext_ModelFactorLongThreshold_Description))]
+        public NormalDistributionProperties ModelFactorLongThreshold
+        {
+            get
+            {
+                return new NormalDistributionProperties(data.GeneralInput.ModelFactorLongThreshold);
+            }
+        }
+
         #endregion
     }
 }
\ No newline at end of file
Index: Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Forms.Test/PropertyClasses/StabilityPointStructuresFailureMechanismPropertiesTest.cs
===================================================================
diff -u -r84fd247421bee82f431195fd74d998bf8b87fa52 -rfab6b7bea64540c3fb4c9abd0f825e1d8c71e4f6
--- Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Forms.Test/PropertyClasses/StabilityPointStructuresFailureMechanismPropertiesTest.cs	(.../StabilityPointStructuresFailureMechanismPropertiesTest.cs)	(revision 84fd247421bee82f431195fd74d998bf8b87fa52)
+++ Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Forms.Test/PropertyClasses/StabilityPointStructuresFailureMechanismPropertiesTest.cs	(.../StabilityPointStructuresFailureMechanismPropertiesTest.cs)	(revision fab6b7bea64540c3fb4c9abd0f825e1d8c71e4f6)
@@ -46,6 +46,7 @@
         private const int modelFactorStorageVolumePropertyIndex = 7;
         private const int modelFactorCollisionLoadPropertyIndex = 8;
         private const int modelFactorLoadEffectPropertyIndex = 9;
+        private const int modelFactorLongThresholdPropertyIndex = 10;
 
         [Test]
         public void Constructor_DataIsNull_ThrowArgumentNullException()
@@ -90,6 +91,8 @@
             Assert.AreEqual(generalInput.ModelFactorCollisionLoad.CoefficientOfVariation, properties.ModelFactorCollisionLoad.CoefficientOfVariation);
             Assert.AreEqual(generalInput.ModelFactorLoadEffect.Mean, properties.ModelFactorLoadEffect.Mean);
             Assert.AreEqual(generalInput.ModelFactorLoadEffect.StandardDeviation, properties.ModelFactorLoadEffect.StandardDeviation);
+            Assert.AreEqual(generalInput.ModelFactorLongThreshold.Mean, properties.ModelFactorLongThreshold.Mean);
+            Assert.AreEqual(generalInput.ModelFactorLongThreshold.StandardDeviation, properties.ModelFactorLongThreshold.StandardDeviation);
         }
 
         [Test]
@@ -110,7 +113,7 @@
             const string modelSettingsCategory = "Modelinstellingen";
 
             PropertyDescriptorCollection dynamicProperties = PropertiesTestHelper.GetAllVisiblePropertyDescriptors(properties);
-            Assert.AreEqual(10, dynamicProperties.Count);
+            Assert.AreEqual(11, dynamicProperties.Count);
 
             PropertyDescriptor nameProperty = dynamicProperties[namePropertyIndex];
             PropertiesTestHelper.AssertRequiredPropertyDescriptorProperties(nameProperty,
@@ -183,6 +186,14 @@
                                                                             "Modelfactor belastingeffect [-]",
                                                                             "Modelfactor belastingeffect.",
                                                                             true);
+
+            PropertyDescriptor modelFactorLongThresholdProperty = dynamicProperties[modelFactorLongThresholdPropertyIndex];
+            Assert.IsInstanceOf<ExpandableObjectConverter>(modelFactorLongThresholdProperty.Converter);
+            PropertiesTestHelper.AssertRequiredPropertyDescriptorProperties(modelFactorLongThresholdProperty,
+                                                                            modelSettingsCategory,
+                                                                            "Modelfactor lange overlaat[-]",
+                                                                            "Modelfactor voor een lange overlaat.",
+                                                                            true);
         }
 
         [Test]
@@ -307,6 +318,7 @@
             Assert.AreEqual(isRelevant, properties.DynamicVisibleValidationMethod(nameof(properties.ModelFactorStorageVolume)));
             Assert.AreEqual(isRelevant, properties.DynamicVisibleValidationMethod(nameof(properties.ModelFactorCollisionLoad)));
             Assert.AreEqual(isRelevant, properties.DynamicVisibleValidationMethod(nameof(properties.ModelFactorLoadEffect)));
+            Assert.AreEqual(isRelevant, properties.DynamicVisibleValidationMethod(nameof(properties.ModelFactorLongThreshold)));
 
             Assert.IsTrue(properties.DynamicVisibleValidationMethod(null));
         }