Purpose: Used to indicate diaphragms in Girder System Projects. (Not applicable to Line Girder Projects.)
--> Given in bracing input
The diaphragms for a given bracing group (see FOR GROUP i, j, ... ) are specified using a particular shape: WhhXwww (W shape), WThhXww (structural tee), or ChhXww (channel). For example, DIAPHRAGM W36X150 FOR GROUP 2 indicates the diaphragms for bracing group 2 is W36X150.
Diaphragm shapes for a given bracing group (see FOR GROUP i, j, ... ) is to be selected from either W, WT, or C. For example, DIAPHRAGM W FOR GROUP 2 indicates the diaphragms for bracing group 2 is to be selected from W shapes.