Question for post frame designers: When designing large PF buildings and considering diaphragm action, the greatest diaphragm deflection occurs at the midpoint of the building. That out-of-plane deflection places additional stress on those sidewall columns. Is it appropriate to design 4-ply glulaminated colums at the middle-third of building length, and use 3-ply columns near the end walls?
Any input or advice is appreciated.
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