Old growth wood species values
Old growth wood species values
(OP)
I have a project that was built in 1973, they want to add another roof system on top of the existing roof (all wood framing). The beams can not support the new weight using modern calcs and wood values. Do you guys know where I can find values for these older growth wood species? Is 1973 even considered old growth wood? I thought most of the old growth value stuff dissapeared in the 50's and 60's. I just ordered SEI/ASCE 11-99 are there values in that publication?
Is there any way to tell if the timber beams are old growth?
Thanks,
Is there any way to tell if the timber beams are old growth?
Thanks,






RE: Old growth wood species values
It is highly unlikely that wood harvested in the 1970's is old growth. However, you can contact the USDA Forest Products Lab to help identify the existing lumber, here is a link:
http://www2.fpl.fs.fed.us/
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RE: Old growth wood species values
RE: Old growth wood species values
Old growth would be stronger if it qualified as dense material. With Douglas fir there is very very little lumber that would qualify as dense.
RE: Old growth wood species values
I agree with the fellow who suggested using flitch plates as another option.