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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17 INCH RISE 17-12 PITCH 54 3 ⁄4 DEGREESCommon<strong>Rafter</strong>LengthHip or Val.<strong>Rafter</strong>LengthRun Ft.1 1' 8 3 ⁄4" 2' 0"2 3' 5 5 ⁄8" 4' 0"3 5' 2 3 ⁄8" 6' 0 1 ⁄8"4 6' 11 1 ⁄4" 8' 0 1 ⁄8"5 8' 8" 10' 0 1 ⁄8"6 10' 4 7 ⁄8" 12' 0 1 ⁄8"7 12' 1 5 ⁄8" 14' 0 1 ⁄8"8 13' 10 1 ⁄2" 16' 0 1 ⁄8"9 15' 7 1 ⁄4" 18' 0 1 ⁄4"10 17' 4 1 ⁄8" 20' 0 1 ⁄4"11 19' 0 7 ⁄8" 22' 0 1 ⁄4"12 20' 9' 3 ⁄4" 24' 0 1 ⁄4"13 22' 6 1 ⁄2" 26' 0 1 ⁄4"14 24' 3 3 ⁄8" 28' 0 1 ⁄4"15 26' 0 1 ⁄8" 30' 0 3 ⁄8"16 27' 9" 32' 0 3 ⁄8"17 29' 5 3 ⁄4" 34' 0 3 ⁄8"18 31' 2 1 ⁄2" 36' 0 3 ⁄8"19 32' 11 3 ⁄8" 38' 0 3 ⁄8"20 34' 8 1 ⁄8" 40' 0 3 ⁄8"21 36' 5" 42' 0 3 ⁄8"22 38' 1 3 ⁄4" 44' 0 1 ⁄2"23 39' 10 5 ⁄8" 46' 0 1 ⁄2"24 41' 7 3 ⁄8" 48' 0 1 ⁄2"25 43' 4 1 ⁄4" 50' 0 1 ⁄2"Common<strong>Rafter</strong>Length40Hip or Val.<strong>Rafter</strong>LengthRun In.1⁄27⁄8" 1"1 1 3 ⁄4" 2"1 1 ⁄2 2 5 ⁄8" 3"2 3 1 ⁄2" 4"2 1 ⁄2 4 3 ⁄8" 5"3 5 1 ⁄4" 6"3 1 ⁄2 6 1 ⁄8" 7"4 7" 8"4 1 ⁄2 7 3 ⁄4" 9"5 8 5 ⁄8" 10"5 1 ⁄2 9 1 ⁄2" 11"6 10 3 ⁄8" 12"6 1 ⁄2 11 1 ⁄4" 13"7 12 1 ⁄8" 14"7 1 ⁄2 13" 15"8 13 7 ⁄8" 16"8 1 ⁄2 14 3 ⁄4" 17"9 15 5 ⁄8" 18"9 1 ⁄2 16 1 ⁄2" 19"10 17 3 ⁄8" 20"10 1 ⁄2 18 1 ⁄8" 21"11 19" 22"11 1 ⁄2 19 7 ⁄8" 23"SpacingIn.Jack <strong>Rafter</strong>Length1 1 3 ⁄4"2 3 1 ⁄2"3 5 1 ⁄4"4 6 7 ⁄8"5 8 5 ⁄8"6 10 3 ⁄8"7 1' 0 1 ⁄8"8 1' 1 7 ⁄8"9 1' 3 5 ⁄8"10 1' 5 3 ⁄8"11 1' 7 1 ⁄8"12 1' 8 3 ⁄4"13 1' 10 1 ⁄2"14 2' 0 1 ⁄4"15 2' 2"16 2' 3 3 ⁄4"17 2' 5 1 ⁄2"18 2' 7 1 ⁄4"19 2' 9"20 2' 10 5 ⁄8"21 3' 0 3 ⁄8"22 3' 2 1 ⁄8"23 3' 3 7 ⁄8"24 3' 5 5 ⁄8"<strong>Rafter</strong>ThicknessMiter Allowance forHip and Valley <strong>Rafter</strong>s<strong>Rafter</strong>DepthBottomAllowance1 1 ⁄2" 1 5 ⁄16" 3 1 ⁄2" 4 15 ⁄16"1 5 ⁄8" 1 7 ⁄16" 5 1 ⁄2" 7 13 ⁄16"1 3 ⁄4" 1 1 ⁄2" 7 1 ⁄4" 10 1 ⁄4"1 7 ⁄8" 1 5 ⁄8" 9 1 ⁄4" 13 1 ⁄8"
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