Jan 09, 2019 · IRC table R602.7 (1) is easy to use. Above, we size a 3'-2" exterior header in a 32-foot-wide, two-story building with less than a 30-psf snow load, and with the sOkaynd floor supported by a center bearing wall. Find “Roof, ceiling and one center-bearing floor” in the far-left lumn (1).
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