A contractor is framing a two-story residence using Douglas Fir-Larch lumber. For a 16-foot span floor joist with 16-inch on-center spacing supporting a live load of 40 psf, what is the minimum joist size required per CBC?
Correct Answer
A) 2x10
Based on CBC span tables for Douglas Fir-Larch at 16" o.c. with 40 psf live load, a 2x10 joist can span 16 feet safely.
Why This Is the Correct Answer
Based on CBC span tables for Douglas Fir-Larch at 16" o.c. with 40 psf live load, a 2x10 joist can span 16 feet safely.
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