diff --git a/src/paveit/datamodels/norm_specification.py b/src/paveit/datamodels/norm_specification.py
index f85f3a1..07fb805 100644
--- a/src/paveit/datamodels/norm_specification.py
+++ b/src/paveit/datamodels/norm_specification.py
@@ -206,4 +206,13 @@ class AsphaltParameterLimitsAsphaltbinderschicht(AsphaltParameterLimitsAsphalttr
     pass
       
 class AsphaltParameterLimitsAsphaltdeckschicht(AsphaltParameterLimitsAsphalttragschicht):
+    pass
+
+class AsphaltParameterLimitsGussasphalt(AsphaltParameterLimitsAsphalttragschicht):
+    pass
+class AsphaltParameterLimitsSMA(AsphaltParameterLimitsAsphalttragschicht):
+    pass
+class AsphaltParameterLimitsPA(AsphaltParameterLimitsAsphalttragschicht):
+    pass
+class AsphaltParameterLimitsACTD(AsphaltParameterLimitsAsphalttragschicht):
     pass
\ No newline at end of file