Existing Lumber
Existing Lumber
(OP)
I need to verify the species and grade of existing roof joists. Any ideas on how to go about this? None of the local testing in my area are able to help.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Existing Lumber
http://www2.fpl.fs.fed.us/WoodID/woodid.html
www.SlideRuleEra.net
RE: Existing Lumber
If it was built later than the 80's the joists may have stamps on them that indicate the species and grade.
If no stamps, go to the applicable wood code of that time and use those values based on the wood type.
As far as grade, look at the lumber and classify it per applicable visual grading standards.
If your doubtful about your assumptions, use the lowest reasonable allowable stresses.
Checking the actual stresses is always a good place to start.
RE: Existing Lumber
RE: Existing Lumber
It is interesting to look at older NDS Specifications--lumber properties (such as Fb) have actually DECREASED over the years (I think due to using faster growing trees these days).
DaveAtkins