Purpose: Used to define the connectivity of double angle members in ASD and LFD Girder System Projects.
--> Given in bracing input
Tension members for ASD and LFD use AASHTO 10.9.1 tension area reduction only if both angles are on the same side of the gusset. The default is to assume double angles straddle the gusset, in which case there is no tension area reduction (10.9.2).