Hello The Diaphragm shear stiffness formula has changed based on the AISI 310-16 and this results in a much higher shear stiffness. Following the procedure suggested by RAM Calculating Semirigid Diaphragm E'... this results in a E' value that is 3-4x…

I am working on a structure that has a flooring system of 3/4" concrete board spanning between cold-form metal joists at 16" O.C. The joists span up to 20' between wide-flange moment and braced frames. In an effort to simplify the modeling for this multi…