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Beam sizing
I have a question regarding this beam. It is 9 ft long adequately supported on both ends through to the foundation and to the ground. It is actually 2 beams.... seperated by a 2 inch space for water lines. So, it is two 2x10x9ft nailed together, then a 2in gap and then another two 2x10x9ft nailed together. As you can see it supports 2x8 ceiling joists and rafters and some purlins. The snow load is 60 and the dead load is minimal ( insulation/sheetrock)1 story. I'm not not sure how to calculate for structural integrity, and was curious about whether this beam or beams is adequate, any info is appreciated, thanks.
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