Timeline for How much weight will a 4"x8"x20ft oak beam support?
Current License: CC BY-SA 3.0
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| Dec 4, 2015 at 17:38 | comment | added | Ecnerwal | awc.org/codes-standards/calculators-software/reversecalc lacks the option of dealing with 4x8 (seems stuck on 2x material) but does include red, white and mixed oak for species. It suggests 2x12 on 12" spacing for a 20 foot span, wet conditions, with load reduced to 30/10 and deflection at l/180 - which tends to support the idea that 4x8 is just plain too small to work. | |
| Feb 24, 2015 at 17:56 | comment | added | DMoore | This has really good points so +1 but we need to see a design to answer better. Also on your notes on wind... Do not make a sail in between the trees. | |
| Feb 24, 2015 at 17:47 | history | answered | Hank | CC BY-SA 3.0 |