diff --git a/src/blenderbim/blenderbim/bim/module/model/prop.py b/src/blenderbim/blenderbim/bim/module/model/prop.py
index a2a356d60f..4a9df1970a 100644
--- a/src/blenderbim/blenderbim/bim/module/model/prop.py
+++ b/src/blenderbim/blenderbim/bim/module/model/prop.py
@@ -256,18 +256,25 @@ class BIMArrayProperties(PropertyGroup):
 
 
 class BIMStairProperties(PropertyGroup):
+    stair_types = (
+        ("CONCRETE", "Concrete", ""),
+        ("WOOD/STEEL", "Wood / Steel", ""),
+    )
+
     is_editing: bpy.props.IntProperty(default=-1)
     width: bpy.props.FloatProperty(name="Width", default=1.2, soft_min=0.01)
     height: bpy.props.FloatProperty(name="Height", default=1.0, soft_min=0.01)
-    number_of_treads: bpy.props.IntProperty(name="Number of Treads (Goings)", default=6, soft_min=1)
+    number_of_treads: bpy.props.IntProperty(name="Number of treads", default=6, soft_min=1)
     tread_depth: bpy.props.FloatProperty(name="Tread Depth", default=0.25, soft_min=0.01)
     tread_run: bpy.props.FloatProperty(name="Tread Run", default=0.3, soft_min=0.01)
     base_slab_depth: bpy.props.FloatProperty(name="Base slab depth", default=0.25, soft_min=0)
     top_slab_depth: bpy.props.FloatProperty(name="Top slab depth", default=0.25, soft_min=0)
     has_top_nib: bpy.props.BoolProperty(name="Has top nib", default=True)
+    stair_type: bpy.props.EnumProperty(name="Stair type", items=stair_types, default="CONCRETE")
 
     def get_props_kwargs(self):
         kwargs = {
+            "stair_type": self.stair_type,
             "width": self.width,
             "height": self.height,
             "number_of_treads": self.number_of_treads,
diff --git a/src/blenderbim/blenderbim/bim/module/model/stair.py b/src/blenderbim/blenderbim/bim/module/model/stair.py
index 60f1fd2950..b224920071 100644
--- a/src/blenderbim/blenderbim/bim/module/model/stair.py
+++ b/src/blenderbim/blenderbim/bim/module/model/stair.py
@@ -92,7 +92,7 @@ def generate_stair_2d_profile(
     has_top_nib,
     top_slab_depth,
     base_slab_depth,
-    stair_type="CONCRETE",
+    stair_type,
 ):
     vertices = []
     edges = []
@@ -162,7 +162,6 @@ def update_stair_modifier(context):
     props = obj.BIMStairProperties
 
     props_kwargs = props.get_props_kwargs()
-    props_kwargs["stair_type"] = "CONCRETE"
     vertices, edges, faces = generate_stair_2d_profile(**props_kwargs)
 
     obj = context.object
@@ -268,6 +267,7 @@ class AddStair(bpy.types.Operator, tool.Ifc.Operator):
         element.NumberOfTreads = props.number_of_treads
         element.RiserHeight = props.height / element.NumberOfRisers
         element.TreadLength = props.tread_depth
+        element.PredefinedType = "STRAIGHT"
         return {"FINISHED"}
 
 
@@ -320,6 +320,7 @@ class FinishEditingStair(bpy.types.Operator, tool.Ifc.Operator):
             element.NumberOfTreads = props.number_of_treads
             element.RiserHeight = props.height / element.NumberOfRisers
             element.TreadLength = props.tread_depth
+            element.PredefinedType = "STRAIGHT"
         return {"FINISHED"}
 
 
diff --git a/src/blenderbim/blenderbim/bim/module/model/ui.py b/src/blenderbim/blenderbim/bim/module/model/ui.py
index 139f703476..0341a869f9 100644
--- a/src/blenderbim/blenderbim/bim/module/model/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/model/ui.py
@@ -329,34 +329,39 @@ class BIM_PT_stair(bpy.types.Panel):
 
         if StairData.data["parameters"]:
             row = self.layout.row(align=True)
-            row.label(text="Stair", icon="IPO_CONSTANT")
+            row.label(text="Stair parameters", icon="IPO_CONSTANT")
 
             stair_data = StairData.data["parameters"]["data"]
-            box = self.layout.box()
             if props.is_editing != -1:
-                row = box.row(align=True)
+                row = self.layout.row(align=True)
                 row.operator("bim.finish_editing_stair", icon="CHECKMARK", text="Finish editing")
                 row.operator("bim.cancel_editing_stair", icon="CANCEL", text="")
-                row = box.row(align=True)
+                row = self.layout.row(align=True)
                 for prop_name in props.get_props_kwargs():
-                    box.prop(props, prop_name)
+                    self.layout.prop(props, prop_name)
                 update_stair_modifier(context)
             else:
-                row = box.row(align=True)
-                row.label(text=f"Parameters:", icon="MOD_ARRAY")
                 row.operator("bim.enable_editing_stair", icon="GREASEPENCIL", text="")
                 row.operator("bim.remove_stair", icon="X", text="")
-                row = box.row(align=True)
+                row = self.layout.row(align=True)
                 for prop in props.get_props_kwargs():
                     prop_value = stair_data[prop]
                     prop_value = round(prop_value, 5) if type(prop_value) is float else prop_value
-                    box.label(text=f"{props.bl_rna.properties[prop].name}: {prop_value}")
+                    row = self.layout.row(align=True)
+                    row.label(text=f"{props.bl_rna.properties[prop].name}")
+                    row.label(text=str(prop_value))
 
             # calculated properties
             number_of_rises = props.number_of_treads + 1
-            box.label(text=f"Number of risers: {number_of_rises}")
-            box.label(text=f"Tread rise: {round(props.height / number_of_rises, 5)}")
-            box.label(text=f"Length: {round(props.tread_run * number_of_rises, 5)}")
+            row = self.layout.row(align=True)
+            row.label(text="Number of risers")
+            row.label(text=str(number_of_rises))
+            row = self.layout.row(align=True)
+            row.label(text="Tread rise")
+            row.label(text=str(round(props.height / number_of_rises, 5)))
+            row = self.layout.row(align=True)
+            row.label(text="Length")
+            row.label(text=str(round(props.tread_run * number_of_rises, 5)))
         else:
             row = self.layout.row()
             row.label(text="No Stair Found")