Fix #5115. Members (e.g. stringers) can now have a stair modifier applied as they may be used to support stairs

src/blenderbim/blenderbim/bim/module/type/operator.py

@@ -441,7 +441,7 @@ class AddType(bpy.types.Operator, tool.Ifc.Operator):
                 tool.Root,
                 obj=obj,
                 predefined_type=predefined_type,
-                ifc_class="IfcStairFlightType",
+                ifc_class=ifc_class,
                 should_add_representation=False,
             )
             tool.Blender.select_and_activate_single_object(context, obj)

src/blenderbim/blenderbim/tool/blender.py

@@ -822,7 +822,9 @@ class Blender(blenderbim.core.tool.Blender):
 
         @classmethod
         def is_eligible_for_stair_modifier(cls, obj):
-            return tool.Blender.is_object_an_ifc_class(obj, ("IfcStairFlight", "IfcStairFlightType"))
+            return tool.Blender.is_object_an_ifc_class(
+                obj, ("IfcStairFlight", "IfcStairFlightType", "IfcMember", "IfcMemberType")
+            )
 
         @classmethod
         def is_eligible_for_window_modifier(cls, obj):