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Unread 12-22-2019, 11:37 PM   #11
cx
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Join Date: Jul 2001
Location: Boerne, Texas
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Yeah, let's do get those project threads combined, Bob.

If your existing joists were a full 6" tall and 12" on center you could have achieved a design deflection exceeding L/360 by adding another joist that size to each one. Given that, I would feel confident that adding a 5 1/2" microlam would be even stiffer, but I cannot find a span table for those microlams you added. You're not, however, gonna get L/720 with that addition.

And the blocking does nothing at all to help your joist design deflection.

My opinion; worth price charged.
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