Porch Roof Rafter Size. Ceiling not attached to rafters and a snow load of 30 psf: Web as a general rule, roofs that have a high human occupancy rate should be framed with rafters every 16. structures such as sheds or barns can be frames with.
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Web so the space between rafters can be greater without reducing the maximum span. Web roof rafter span: Calculate the initial value for d, then round it up to the nearest inch.
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Web 2×6 shed roof rafters are enough for nearly any type of shed a homeowner wants to build. Ceiling not attached to rafters and a snow load of 30 psf: Web it looks like the answer is probably not. if this calculator from the american wood council is to be believed (and if my assumptions about your materials and load are. Web rafter length = √ (rise² + run²).
