If any of the above condition is detected, the diaphragm is directly meshed. Note that even if a rigid diaphragm is meshed if a two-way deck is found inside the rigid diaphragm. The meshing process is fully automated. It detects all wall intersections with the diaphragm (hence, the diaphragm and walls are attached at the same mesh points to provide proper load transverse from the diaphragm to walls) as well as deck polygons, openings, and slab edge polygons.

The Story Diaphragm dialog includes several options used for controlling meshing procedures.