Two Excel Software Tools (Primary and Secondary) are provided for determination of Wind loads to Steel Lateral Force Resisting System (LFRS) elements in Simple Buildings assuming Rigid Diaphragm Analysis (RDA) assumptions, where loads are distributed to resisting elements according to their relative stiffness and location away from the Center of Rotation (COR) of the rigid diaphragm.

The Primary software tool consists of eight separate worksheets, for which data is provided by the User in the first three worksheets to define the Steel building (and wind loads) in both orthogonal directions, for which results are then provided (for a single Floor Level) in the last five worksheets (column shear forces, displacements, over-turning forces, summary, member forces, roof uplift).  The second software tool is used to verify ASCE Drift requirements for the entire building.