I have a commercial project where the architect wants to use exposed 3/4"
plywood over exposed 4x rafters at 48" o.c. He does not want to see any 2x4's
blockings between the rafters. Prelim calcs show maximum diaphragm shear to
be around 150 plf. Does anyone know--- for plywood horizontal diaphragm shear
values; if there is any place in the UBC where one can find diaphragm shear
values for framing member spacing more than 16" o.c.?
(long time lurker)