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RE: concentrated load to plywood or OSB

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Thank you all for your replies,

The concentrated loads I have are relatively small.  I was able to work with the APA Specifications which gave all the values I was looking for including allowable values for rolling shear which did check out.

Thanks again,




From: Harold Sprague [mailto:spraguehope(--nospam--at)]
Sent: Wednesday, March 17, 2010 8:22 AM
To: seaint(--nospam--at)
Subject: RE: concentrated load to plywood or OSB


Look at the APA design specification.  I designed floors for battery racks a long time ago.  What drives the design will be the "rolling shear".  This is like horizontal shear only it causes a failure mechanism within the plies.  I am not sure how that works with OSB.  I think I would stick to plywood for high concentrated loads. 
I doubt you will find any tables other than the APA Caster Loading on Plywood document that has been suggested.  

Regards, Harold Sprague


From: vveng(--nospam--at)
To: seaint(--nospam--at)
Subject: concentrated load to plywood or OSB
Date: Mon, 15 Mar 2010 13:34:52 -0700

I am looking for some tables (hopefully), or possibly published example calculations for determining the allowable concentrated load to a plywood or OSB panel.  I have searched the APA site, but didn’t find anything that specific.  But, that doesn’t mean it doesn’t exist there or somewhere else.


Can anyone point me in the right direction?  The help will be most appreciated.


Joe Grill




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