Can I have 3(2x8) beam/girder with 2x10 joists 12" OC? I'm building a 16x16 ledger mounted deck. Two footings were poured a little higher than they should be. There are four 16" footings of 5,000 psi concrete supporting 6x6 posts.
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Why can't the posts be shortened? – isherwood Nov 14 '18 at 3:39
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Typically beams need to be the same height as the joists unless you have special hangers designed for the job. – isherwood Nov 14 '18 at 3:40
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One of the four 16" was poured 1.5 inch too high – skillsman Nov 15 '18 at 2:14
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So you said. It's normal for footings to be slightly out of level, as concrete is more difficult to set precisely than framing. Again, why can't the post be shortened? – isherwood Nov 15 '18 at 2:39
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Reference the American Wood Council's Residential Wood Deck Construction Guide free download pdf.
It looks like 3 2x8 beams allow a longer joist span than 2 2x10s.
