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  • Understanding Loads and Using Span Tables - American Wood Council
    First, remember that the rafter’s span is not its actual length, but its total horizontal projection (see Figure 6) Second, use the snow load value for your region in determining which rafter table to use If your code book says your snow load is 40 psf, then you must use the 40 psf live load rafter table
  • Rafter Span Tables - myCarpentry
    Consult your local building code authority to determine the snow load in your area The following span table uses a moderate snow load of 50 Psf, but yours could be more or less Rafters with ceiling not attached to rafters, ground snow load = 50 Psf, dead load = 20 Psf, deflection limit L 180
  • Rafter size chart for 90 psf ground snow load? - Sawmill Creek
    When I put the 90# snow load in the calculator the maximum horizontal span for a 2x10 #2 grade eastern white pine rafter is 7'9", and my horizontal span will be 7'8" I'm planning to make birds-mouth cuts that are 3" long and the ridge pole will take another inch off
  • Understanding Loads and Using Span Tables - UMass Amherst
    The snow load is treated as a live load when you use AF PA’s tables If your code book says your snow load is 40 psf, then you use the 40 psf live load rafter table The fact that snow loads only act part of the year has been used to create the rafter tables
  • Ideal Roofing Table Rafter Span Explained - coohom. com
    A: Typically, a 2x6 rafter can span up to 12 feet, depending on the load and spacing Q: How does snow load affect rafter span? A: Increased snow loads require shorter rafter spans to ensure structural integrity during winter
  • Rafter span and spacing for 10 12 or 12 12 pitch - Fine . . .
    A 2x4 roof rafter span is limited to 10'10" with 12" on-center spacing for Douglas Fir-Larch #2 or Southern Pine #2 for 10 Lb dead load, 20 Lb live load For 20 Lb dead load, 30 Lb snow load, the 2x4 roof rafter span drops to 8'5" and 9'0" for Douglas Fir-Larch and Southern Pine respectively
  • Rafters - ICC Digital Codes
    Determine the minimum size and maximum spacing of a #2 spruce-pine-fir rafter with a span of 12 feet, as shown in Figure 6-30 The ground snow load is 50 psf and the dead load is 10 psf Refer to Figure 6-30 and Table 6-16





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