Creating an Autodesk Revit Building Pad -- Part 1

An Autodesk Revit building pad will automatically cut through a toposurface -- usually following an outline of your building's basement walls. The Part 1 video is the process when the building walls and the toposurface are in the same file. The Part 2 video is the process to follow when the building walls and the toposurface are in separate, linked files. See Part 2: http://youtu.be/5KCC0dR4A3o