Purpose: Used to define internal diaphragms at supports of box girders.
--> Given in girder input
Indicates there is a bearing under each web of a box girder. The condition SINGLE BEARING STIFFENERS EACH SIDE in this situation indicates there is one stiffener per web, while the condition DOUBLE BEARING STIFFENERS EACH SIDE indicates there are two stiffeners on one side of each web. (Also see NBSTIFF )