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floor joist spacing

Minimum Floor Joist Sizes UpCodes

Floor joist size and thickness shall be determined in accordance with the limits set forth in Table R505.3.2 for single or continuous spans. Where continuous joist

WAC 246-359-220:

(a) Floor joists must be a minimum two-by-six spaced sixteen inches on center or two-by-eight spaced twenty-four inches on center, Hem-Fir #2 or better,