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RE: Wood Exposed for 5 Months During Construction

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I would address these concerns to the regional wood council as well as the
company who is responsible for the performance of the proprietary elements.

> -----Original Message-----
> From:	Jie Lu, P.E., S.E. [SMTP:jayjielu(--nospam--at)worldinter.net]
> Sent:	Friday, July 07, 2000 11:30 AM
> To:	seaint(--nospam--at)seaint.org
> Subject:	Wood Exposed for 5 Months During Construction
> 
> Dear Fellow Engineers:
> 
> Here is an exposed wood question to see if you can help. Thanks in
> advance.
> 
> At the request of a developer, I visited a new 2-story single family
> house.
> The house is under construction. The project was shut down by the Building
> Official
> for some reason five months ago. Concrete basement and first floor
> (TJI/Pro
> joists and
> OSB deck) were in place before the shutdown. The first floor wood studs
> were
> in place as well.
> There was no weather protection at all for the half constructed house
> during
> the five months period.
> 2x pre-fab. wood roof trusses, 2nd floor TJL joists, 2x6 wood studs are
> all
> laying on the ground as well.
> 
> The building was designed by an unlicensed architect without any
> structural
> engineer's
> consultation.
> 
> The developer would like to continue the project now. Of course they would
> like to
> keep the wood product in place as much as possible. The city is requesting
> a
> structural evaluation
> report on the exposed wood members before issuing building permit.
> 
> The question is how to structurally evaluate regular wood (not
> pressure-treated), OSB,
> TJI/Pro joists after five months weather exposure.
> 
> I am considering the following:
> 
> 1. Test a representative sample for moisture content to be lower than 19%.
> 
> 2. Test a sample of TJI/Pro joist and OSB deck in a material lab for
> structural capacity
>      and rebounding.
> 
> 3. Apply certain wood treatment sealer protect the weathered wood from
> decay.
> 
> 4.  Have truss manufacturer to evaluate the trusses.
> 
> Any comments will be appreciated. Thanks again.
> 
> 
> Jie Lu, P.E., S.E.
> J. Lu International, LLC
> St. Louis, Missouri
> 
> 
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