Variable Layer Thickness for Roofs and Structural Floors

The variable layer thickness parameter of roofs and floors affects the shape editing tools in the following ways:

• When there is no variable thickness layer, the whole roof or floor slopes and maintains constant thickness between parallel top and bottom faces.
  
• When there is a variable thickness layer, the top face of the roof or floor slopes, and the bottom stays in a horizontal plane, creating a variable thickness floor.
  
  Note: There is a Thickness property for structural floors. If the structural floor has a structural floor shape edit, and if the structural floor type contains a variable layer, then this parameter can be used to set the structural floor to a uniform thickness by entering a desired value.

To modify the variable thickness layer of a floor or roof

1. Select the floor or roof.
2. On the Properties palette, click Edit Type.
3. In the value box of the Structure property, click Edit.
4. In the Edit Assembly dialog, specify the material for layers and the thickness of those layers. The variable thickness parameter column will contain empty check boxes next to layers where variable thickness can be enabled. For more information about the Edit Assembly dialog, see Compound Structure.
5. Next to the desired layer of the roof or floor in the assembly, select the variable check box
6. Click OK until all of the dialogs are closed.
7. Click Modify | <element> tabShape Editing panelModify Sub Elements and make the desired changes to the roof or floor. For more information, see Using the Modify Sub Elements Tool.