my forensic experiences I wouldn't use OSB around doors/windows due to
its water sensitivity YMMV
Chuck Utzman P.E.
Drew Morris wrote:
> OSB is acceptable for use in shearwalls. It is not a Structural 1
> panel, so the allowable shears will be less. In the 2006 IBC Table
> 2306.4.1, you need to use the values in the lower half of the table.
> There is a footnote d that allows you to use 7/16" thick panels but
> use the shear values for 15/32" if the studs are spaced at 16" oc.
> Not sure how the CBC differs from the IBC here.
>
> Have you had luck in finding Structural 1 plywood? My understanding
> is that it is hard to find. I tried specifying it some years back but
> switched to OSB on both sides due to availability/cost.
>
>
> Tim Rudolph wrote:
>> Hi,
>> I have designed an addition to my local volunteer fire department
>> building. It is an essential facility - I called for 5 ply Structural
>> 1 plywood for the shear walls and plywood for the roof diaphragm.
>> The contractor would like to substitute OSB for the plywood(OSB is
>> cheaper). In custom homes and commercial buildings it has not been a
>> problem to allow the change. But with the Essential Facility
>> Structure is plywood what should be used over OSB?
>>
>> Or rephrased what would OSHPOD want- in a hospital building?
>>
>> I know about OSB and a slightly different /stiffer interaction at the
>> wood nail interface
>>
>> Thanks,
>> Tim Rudolph PE
>> Bishop CA
>>
>> Hanging out in Digest mode
>>
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