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robinomalo
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# Posted: 24 May 2022 10:43am
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Planning on building a 16x24 cabin with Rafter spanning across the 24 foot length with beam support in the middle at the 12 foot mark. Roof pitch will be 4/12 with the smallest wall being 8 foot and the tallest 16.
What rafter size should I use? Knowing that they will be 24 oc with a 45 PSF snow load during winter.
Should I go with true size 2x10 or 2x12? Or even bigger?
Thanks for your help.
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gcrank1
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# Posted: 24 May 2022 12:03pm - Edited by: gcrank1
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If you are going to run the long way (which I did on an '83 build), imo (but Im no engineer), you should consider something like queen posts and cross-beams arrangement to support the rafters mod-span.
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Upper
Member
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# Posted: 25 May 2022 09:08am - Edited by: Upper
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When sizing your center beam, note that it will be carrying half the weight and either wall one quarter of the weight.
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Malamute
Member
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# Posted: 19 Jun 2022 11:06pm
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I think this is the span calculator I used to use.
https://awc.org/calculators/span-options-calculator-for-wood-joists-and-rafters/
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