Modify the Structure of a Building Pad

Modify the structure of a building pad by assigning a function to each layer in the assembly.

1. Open the site plan that contains the building pad.
2. Select the building pad.
   Note: Use Tab to cycle through the selection options. Selection options are displayed on the left side of the status bar.
3. Click Modify | Pads tabProperties panel (Type Properties).
4. In the Type Properties dialog, for Structure, click Edit.
5. In the Edit Assembly dialog, set the function for each layer.

   Each layer must have a function assigned to it, so Revit LT can match layers accurately. Layers can be assigned for the following functions:

   • Structure. A layer that supports the remainder of the building pad.
   • Substrate. A material that acts as a foundation for another material.
   • Thermal/Air Layer. A layer that provides insulation and prevents air penetration
   • Finish 1. A finish layer, for example, the top surface of the building pad.
   • Finish 2. A finish layer, for example, the bottom surface of the building pad.
   • Membrane Layer. A membrane of zero thickness that prevents water vapor penetration.
   Note: The Wraps check box can be left unchecked.
6. Set the Material and Thickness for each layer.
7. Click Insert to add a new layer. Click Up or Down to change the layer order.
8. Click OK twice.