A steel structure my office is working on has a large opening at the roof for skylights, as such lateral deflection of the roof system is a concern. To limit the deflections we came up with a horizontal in-plane truss. The diaphragm is flexible metal…

In horizontal bracing connection, why weld capacity between the support angle and the gusset is considered for one side only while there is a double angle and each of them is welded to the gusset plate?