what size tgi floor joist can i use to span a 28 foot distance?

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what size tgi floor joist can i use to span a 28 foot distance?

2007-03-03 12:24:51 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Engineering

2 answers

Trus Joist 1.7E Timberstrand LSL 1.75 x 16 every 16" for typical residential live load and no point or wall load will work.

Deflection allowable governs this because the span is so big. If you can allow more deflection, you may be able to use a 14" deep section.

2007-03-04 12:47:33 · answer #1 · answered by daedgewood 4 · 0⤊ 0⤋

according to swanson's "Blue Book" you need 2x12 joists and
cross members every 24 inches.

2007-03-03 20:35:07 · answer #2 · answered by camswitch 2 · 0⤊ 0⤋