Old Wood Framing
Old Wood Framing
(OP)
What do you do to determine engineering values for old wood framing?
Early 20th century wood framing.
Wood floor/roof joists that are actual size (2x12 is 2"x12").
Wood headers/beams.
Will not be doing any on site load testing.
Probably will not do any lab testing of individual pieces.
I have some history of the building and what it was used for.
Nothing in writing concerning the history of the building.
There are no drawings available.
Early 20th century wood framing.
Wood floor/roof joists that are actual size (2x12 is 2"x12").
Wood headers/beams.
Will not be doing any on site load testing.
Probably will not do any lab testing of individual pieces.
I have some history of the building and what it was used for.
Nothing in writing concerning the history of the building.
There are no drawings available.





RE: Old Wood Framing
I usually stay close to Fb = 800 psi depending on how the wood visually looks to me and if there is visible sagging or moisture exposure.
If the wood looks crappy (a technical term) then I may go to 500.
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RE: Old Wood Framing
Wood looks very good.
Building was a farm implement factory.
RE: Old Wood Framing
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Old Wood Framing
RE: Old Wood Framing
For some truly gorgeous lumber we have used 2,000psi for bending. They were rough sawn 3x14's 22-ft long, and some were being removed others re-used. The contractor was just throwing some of them away. We grabbed bout 30 of them for a co-workers project. Then he moved so I imagine they are rotting under a tarp somewhere.
RE: Old Wood Framing
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RE: Old Wood Framing
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.