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Old 04-29-2018, 02:13 PM   #1
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Need help with maximum span for trellis beam?


I am looking to build a freestanding trellis structure. Made with CMU block columns, and (2) main beams that span approx 24' between the columns. The ID between columns is 24' x 16'.

Live in CALIFORNIA where there is no snow load.

Expect that the Main beams will have (6) 6x8 cross members and ontop of these (6) crossmembers will be some 2x2 on 1' Centers.

I can not find a table for a size of beam to span 24'.

Have read articles about bracing the beam with 1/2" plate steel, but still looking for he right beam dimension. Anyone have a source for this calculation?
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Old 04-29-2018, 09:43 PM   #2
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Re: Need help with maximum span for trellis beam?


Your beams will most likely warp badly.

Unless you can find some beams that are 100+ years old from an old barn.

Engineered beams are much better at staying true, and not warping.


ED
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