Has anyone ever seen a span table for old ACTUAL dimension floor joists?
I’m constantly working with 80-100 year old ACTUAL dimension pine floor joists. 2×8 are actually 2×8, the 2x10s actual 2x10s.
Compared to their slimmer decendants, these beefier joists can certainly carry more weight over longer spans. The problem is, inspectors (and many structural engineers, sadly) treat these as nominal framing.
I’ve never seen even a meager attempt at a span table for actual size lumber. I realize that without a structural stamp, its hard to tell the exact attributes of such wood. Still, an actual dimension lumber span table would be useful in planning which floors are sufficient for modern loads, and which are not.
Has any one seen such a span table? if so, please forward.
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