Purpose: Used to define internal diaphragms at supports of box girders.
--> Given in girder input
Thickness of box girder internal diaphragm located at a bearing (inches or mm). Assumed to be the same as the web thickness if not given. (Also see EDIABF , EDIATF) Can be given as a list of values for support locations. If a single value is given that value will be used at all supports.