I'd assume as long as they're graded and don't look totally thrashed they should pass. I have some old rough cut beams from a Chicago 3 flat demolition that I hope to use somewhere, but I doubt I'll be able to use them structurally without having them individually inspected or graded.
I've been framing in this state since 1983 and I haven't once seen an inspector look at a grade stamp. Not saying they won't just saying I've never seen it. I framed hundred of homes. There's been times I've worked on a 400 home tract back in the day as a lead so I was right there with inspectors. I've work on many customs also.
R104.9.1 Used materials and equipment. Used materials, equipment and devices shall not be reused unless approved by the building official.
104.9.1 Used materials and equipment. The use of used materials which meet the requirements of this code for new materials is permitted.* Used equipment and devices shall not be reused unless approved by the building official.
I've used "used" wall studs in walls before and added them in with new studs- the width of the old was wider than the new so posed a problem but worked great where only the interior side was utilized and the difference set into the void behind the wall. I'd say use the used wood vertically only and not horizontally and you should be good. now, building a shed is a whole other matter, that used lumber could be used for every board on the place
Just my .02 cents. I would not bother to use used lumber. Reasons being,most lumber is so dried out nailing tends to split it in most applications unless the nails are strictly going into end grain. Also, "new" lumber tends to shrink a tad enhancing the bond around the fastener / nail, on used lumber that ship has long sailed.
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