Purpose: Used to specify section properties of bracing for preliminary analysis in Girder System Design Projects. (Not applicable to Line Girder Projects.)
--> Given in girder system input
Uniform St. Venant torsional stiffness (in4 or mm4) for bracing to be used if bracing has not been defined by types and shapes. (Default is 5 in4 or 2.08 x 10^6 mm4, unless specified by JBR or JB-i)