Purpose: Used to designate girder lines as stringers in Girder System Projects. (Not applicable to Line Girder Projects.)
--> Given in girder system input
A list of girder numbers indicating which "girder" lines in the model actually are lines of stringers simply supported at bracing nodes. Only available when using the grid model (see GRID MODEL condition).
(Note: hinges should not be defined for girders that are specified as stringers.)