Purpose: Used to indicate type of bridge in Girder System Projects.
--> Given in girder system input
Uses impact factors from Table 1.25B (ASD) in the 1993 Curved Girder Guide Specification or Table 3.5.6.2 (LFD) in the 2003 Curved Girder Guide Specification for composite box girders if curved.
In LRFD projects, impact is according to the LRFD specification.
(The other function of this command is to set up the girder inputs for box girders.)
Type of Girders in Parallel/Concentric Girder System Projects