IRWIN® Rafter Square Reference Guide Complete Instruction Book ...
IRWIN® Rafter Square Reference Guide Complete Instruction Book ...
IRWIN® Rafter Square Reference Guide Complete Instruction Book ...
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10 INCH RISE 10-12 PITCH 40 DEGREESCommon<strong>Rafter</strong>LengthHip or Val.<strong>Rafter</strong>LengthRun Ft.1 1' 3 5 ⁄8" 1' 7 3 ⁄4"2 2' 7 1 ⁄4" 3' 3 3 ⁄8"3 3' 10 7 ⁄8" 4' 11 1 ⁄8"4 5' 2 1 ⁄2" 6' 6 3 ⁄4"5 6' 6 1 ⁄8" 8' 2 1 ⁄2"6 7' 9 3 ⁄4" 9' 10 1 ⁄4"7 9' 1 3 ⁄8" 11' 5 7 ⁄8"8 10' 5" 13' 1 5 ⁄8"9 11' 8 5 ⁄8" 14' 9 1 ⁄4"10 13' 0 1 ⁄4" 16' 5"11 14' 3 7 ⁄8" 18' 0 5 ⁄8"12 15' 7 1 ⁄2" 19' 8 3 ⁄8"13 16' 11" 21' 4 1 ⁄8"14 18' 2 5 ⁄8" 22' 11 3 ⁄4"15 19' 6 1 ⁄4" 24' 7 1 ⁄2"16 20' 10" 26' 3 1 ⁄8"17 22' 1 1 ⁄2" 27' 10 7 ⁄8"18 23' 5 1 ⁄8" 28' 6 5 ⁄8"19 24' 8 3 ⁄4" 31' 2 1 ⁄4"20 26' 0 3 ⁄8" 32' 10"21 27' 4" 34' 5 5 ⁄8"22 28' 7 5 ⁄8" 36' 1 3 ⁄8"23 29' 11 1 ⁄4" 37' 9"24 31' 2 7 ⁄8" 39' 4 3 ⁄4"25 32' 6 1 ⁄2" 41' 0 1 ⁄2"Common<strong>Rafter</strong>Length33Hip or Val.<strong>Rafter</strong>LengthRun In.1⁄25⁄8" 7⁄8"1 1 1 ⁄4" 1 5 ⁄8"1 1 ⁄2 2" 2 1 ⁄2"2 2 5 ⁄8" 3 1 ⁄4"2 1 ⁄2 3 1 ⁄4" 4 1 ⁄8"3 3 7 ⁄8" 4 7 ⁄8"3 1 ⁄2 4 1 ⁄2" 5 3 ⁄4"4 5 1 ⁄4" 6 5 ⁄8"4 1 ⁄2 5 7 ⁄8" 7 3 ⁄8"5 6 1 ⁄2" 8 1 ⁄4"5 1 ⁄2 7 1 ⁄8" 9"6 7 3 ⁄4" 9 7 ⁄8"6 1 ⁄2 8 3 ⁄8" 10 3 ⁄4"7 9" 11 1 ⁄2"7 1 ⁄2 9 3 ⁄4" 12 3 ⁄8"8 10 3 ⁄8" 13 1 ⁄8"8 1 ⁄2 11" 14"9 11 5 ⁄8" 14 3 ⁄4"9 1 ⁄2 12 1 ⁄4" 15 5 ⁄8"10 13" 16 1 ⁄2"10 1 ⁄2 13 5 ⁄8" 17 1 ⁄4"11 14 1 ⁄4" 18 1 ⁄8"11 1 ⁄2 14 7 ⁄8" 18 7 ⁄8"SpacingIn.Jack <strong>Rafter</strong>Length1 1 1 ⁄4"2 2 5 ⁄8"3 3 7 ⁄8"4 5 1 ⁄4"5 6 1 ⁄2"6 7 3 ⁄4"7 9 1 ⁄8"8 10 3 ⁄8"9 11 3 ⁄4"10 1' 1"11 1' 2 3 ⁄8"12 1' 3 5 ⁄8"13 1' 4 7 ⁄8"14 1' 6 1 ⁄4"15 1 7 1 ⁄2"16 1' 8 7 ⁄8"17 1' 10 1 ⁄8"18 1' 11 3 ⁄8"19 2' 0 3 ⁄4"20 2' 2"21 2' 3 3 ⁄8"22 2' 4 5 ⁄8"23 2' 6"24 2' 7 1 ⁄4"<strong>Rafter</strong>ThicknessMiter Allowance forHip and Valley <strong>Rafter</strong>s<strong>Rafter</strong>DepthBottomAllowance1 1 ⁄2" 1" 3 1 ⁄2" 2 15 ⁄16"1 5 ⁄8" 1 1 ⁄16" 5 1 ⁄2" 4 9 ⁄16"1 3 ⁄4" 1 1 ⁄8" 7 1 ⁄4" 6 1 ⁄16"1 7 ⁄8" 1 1 ⁄4" 9 1 ⁄4" 7 11 ⁄16"
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