Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/Views/SectionResultRows/GrassCoverSlipOffOutwardsSectionResultRow.cs
===================================================================
diff -u -r7237c90011fccd0ef7d6888fd9a8608f4f9020b3 -rf2cb20c760b6830245f781b0527fff6f6a6e8795
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/Views/SectionResultRows/GrassCoverSlipOffOutwardsSectionResultRow.cs	(.../GrassCoverSlipOffOutwardsSectionResultRow.cs)	(revision 7237c90011fccd0ef7d6888fd9a8608f4f9020b3)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/Views/SectionResultRows/GrassCoverSlipOffOutwardsSectionResultRow.cs	(.../GrassCoverSlipOffOutwardsSectionResultRow.cs)	(revision f2cb20c760b6830245f781b0527fff6f6a6e8795)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using Core.Common.Controls.DataGrid;
 using Ringtoets.AssemblyTool.Data;
 using Ringtoets.AssemblyTool.Forms;
 using Ringtoets.Common.Data.Exceptions;
@@ -78,6 +79,8 @@
             combinedAssemblyCategoryGroupIndex = constructionProperties.CombinedAssemblyCategoryGroupIndex;
             manualAssemblyCategoryGroupIndex = constructionProperties.ManualAssemblyCategoryGroupIndex;
 
+            CreateColumnStateDefinitions();
+
             Update();
         }
 
@@ -223,6 +226,30 @@
             UpdateDerivedData();
         }
 
+        private void CreateColumnStateDefinitions()
+        {
+            ColumnStateDefinitions.Add(simpleAssessmentResultIndex, new DataGridViewColumnStateDefinition());
+            ColumnStateDefinitions.Add(detailedAssessmentResultIndex, new DataGridViewColumnStateDefinition());
+            ColumnStateDefinitions.Add(tailorMadeAssessmentResultIndex, new DataGridViewColumnStateDefinition());
+            ColumnStateDefinitions.Add(simpleAssemblyCategoryGroupIndex, new DataGridViewColumnStateDefinition
+            {
+                ReadOnly = true
+            });
+            ColumnStateDefinitions.Add(detailedAssemblyCategoryGroupIndex, new DataGridViewColumnStateDefinition
+            {
+                ReadOnly = true
+            });
+            ColumnStateDefinitions.Add(tailorMadeAssemblyCategoryGroupIndex, new DataGridViewColumnStateDefinition
+            {
+                ReadOnly = true
+            });
+            ColumnStateDefinitions.Add(combinedAssemblyCategoryGroupIndex, new DataGridViewColumnStateDefinition
+            {
+                ReadOnly = true
+            });
+            ColumnStateDefinitions.Add(manualAssemblyCategoryGroupIndex, new DataGridViewColumnStateDefinition());
+        }
+
         private void UpdateDerivedData()
         {
             TryGetSimpleAssemblyCategoryGroup();