diff --git a/src/blenderbim/blenderbim/bim/module/model/workspace.py b/src/blenderbim/blenderbim/bim/module/model/workspace.py
index f2a8b0d52f..86c8c8214d 100644
--- a/src/blenderbim/blenderbim/bim/module/model/workspace.py
+++ b/src/blenderbim/blenderbim/bim/module/model/workspace.py
@@ -109,7 +109,7 @@ class BimToolUI:
 
             row = cls.layout.row(align=True)
             row.prop(data=cls.props, property="x_angle", text="X Angle")
-        elif cls.props.ifc_class == "IfcSlabType":
+        elif cls.props.ifc_class in ("IfcSlabType", "IfcRampType", "IfcRoofType"):
             row = cls.layout.row(align=True)
             row.prop(data=cls.props, property="x_angle", text="X Angle")
         elif cls.props.ifc_class in ("IfcColumnType", "IfcBeamType", "IfcMemberType"):
@@ -177,7 +177,7 @@ class BimToolUI:
             row.label(text="", icon="EVENT_G")
             row.operator("bim.hotkey", text="Regen").hotkey = "S_G"
             row.operator("bim.join_wall", icon="X", text="").join_type = ""
-        elif AuthoringData.data["active_class"] in ("IfcSlab", "IfcSlabStandardCase"):
+        elif AuthoringData.data["active_class"] in ("IfcSlab", "IfcSlabStandardCase", "IfcRamp", "IfcRoof"):
             if context.active_object.mode == "OBJECT":
                 row = cls.layout.row(align=True)
                 row.label(text="", icon="EVENT_SHIFT")
@@ -414,7 +414,7 @@ class Hotkey(bpy.types.Operator, tool.Ifc.Operator):
     def hotkey_S_E(self):
         if self.active_class in ("IfcWall", "IfcWallStandardCase"):
             bpy.ops.bim.join_wall(join_type="T")
-        elif self.active_class in ("IfcSlab", "IfcSlabStandardCase"):
+        elif self.active_class in ("IfcSlab", "IfcSlabStandardCase", "IfcRamp", "IfcRoof"):
             if not bpy.context.active_object:
                 pass
             elif bpy.context.active_object.mode == "OBJECT":
diff --git a/src/ifcopenshell-python/ifcopenshell/api/geometry/add_slab_representation.py b/src/ifcopenshell-python/ifcopenshell/api/geometry/add_slab_representation.py
index f0ecff352f..91152d5c4f 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/geometry/add_slab_representation.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/geometry/add_slab_representation.py
@@ -17,6 +17,7 @@
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
 import ifcopenshell.util.unit
+from math import sin, cos
 
 
 class Usecase:
@@ -25,6 +26,7 @@ class Usecase:
         self.settings = {
             "context": None,  # IfcGeometricRepresentationContext
             "depth": 0.2,
+            "x_angle": 0, # Radians
             # Planes are defined as a matrix. The XY plane is the clipping boundary and +Z is removed.
             "clippings": [],  # A list of planes that define clipping half space solids
         }
@@ -47,10 +49,16 @@ class Usecase:
             curve = self.file.createIfcPolyline([self.file.createIfcCartesianPoint(p) for p in points])
         else:
             curve = self.file.createIfcIndexedPolyCurve(self.file.createIfcCartesianPointList3D(points))
+        if self.settings["x_angle"]:
+            extrusion_direction = self.file.createIfcDirection(
+                (0.0, sin(self.settings["x_angle"]), cos(self.settings["x_angle"]))
+            )
+        else:
+            extrusion_direction = self.file.createIfcDirection((0.0, 0.0, 1.0))
         extrusion = self.file.createIfcExtrudedAreaSolid(
             self.file.createIfcArbitraryClosedProfileDef("AREA", None, curve),
             None,
-            self.file.createIfcDirection((0.0, 0.0, 1.0)),
+            extrusion_direction,
             self.convert_si_to_unit(self.settings["depth"]),
         )
         if self.settings["clippings"]:
diff --git a/src/ifcopenshell-python/ifcopenshell/api/geometry/add_wall_representation.py b/src/ifcopenshell-python/ifcopenshell/api/geometry/add_wall_representation.py
index 20a4e5da52..549141679c 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/geometry/add_wall_representation.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/geometry/add_wall_representation.py
@@ -16,8 +16,8 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
-from math import sin, cos
 import ifcopenshell.util.unit
+from math import sin, cos
 
 
 class Usecase: