diff --git a/src/blenderbim/blenderbim/bim/module/model/mep.py b/src/blenderbim/blenderbim/bim/module/model/mep.py
index 540cbf0e43..7eceb0d574 100644
--- a/src/blenderbim/blenderbim/bim/module/model/mep.py
+++ b/src/blenderbim/blenderbim/bim/module/model/mep.py
@@ -1121,6 +1121,7 @@ class MEPAddBend(bpy.types.Operator, tool.Ifc.Operator):
             "end_length": self.end_length / si_conversion,
             "radius": self.radius / si_conversion,
             "angle": degrees(angle),
+            "main_profile_dimension": profile_dim[lateral_axis] / si_conversion,
         }
         # find the compatible fitting type
         fitting_data = MEPGenerator().get_compatible_fitting_type(
diff --git a/src/ifcopenshell-python/ifcopenshell/util/shape_builder.py b/src/ifcopenshell-python/ifcopenshell/util/shape_builder.py
index def232d795..ccedb3f107 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/shape_builder.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/shape_builder.py
@@ -1454,5 +1454,6 @@ class ShapeBuilder:
             "lateral_axis": lateral_axis,
             "lateral_sign": lateral_sign,
             "flip_z_axis": flip_z_axis,
+            "main_profile_dimension": profile_dim[lateral_axis],
         }
         return rep, bend_data