Limits for Horizontal Wood Diaphragm Deflection
Limits for Horizontal Wood Diaphragm Deflection
(OP)
Would someone kindly point me in the direction of where limits are located for Horizontal Wood Diaphragm Deflection. I see how to calculate diagraphm deflection with EQ 23-1 in 2305.2.2, but I don't seem to be able to locate limiting criteria.
Thanks, for your help.
Thanks, for your help.






RE: Limits for Horizontal Wood Diaphragm Deflection
The old plywood diaphragm design manuals from the APA that I have merely state that wood walls will tolerate more lateral deflection from the diaphragm than masonry or concrete walls. Not really much help as they are putting the limitation for deflection on the wall design.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Limits for Horizontal Wood Diaphragm Deflection
If that is the case the allowable drift at the top of the wall near the center of the building may be your limiting criteria. h/180 is usually a good limitation for deflection in the vertical plane.
RE: Limits for Horizontal Wood Diaphragm Deflection
RE: Limits for Horizontal Wood Diaphragm Deflection
Also in some codes the span to width ratio of a horizontal wood diaphragm is 4:1.
John Southard, M.S., P.E.
http://www.pdhlibrary.com