Home Building And Repairs

How To Layout Common Roof Rafter With Framing Square Step Off Method - Part Two


But wait," you say, "my roof isn't exactly 12 feet wide!"  No problem. Let's say your total rafter run is 14 feet, 6 inches. Here's how to handle those extra inches:

Calculate the Overhang: First, figure out your rafter overhang. This is the portion of the rafter that extends beyond the wall. Let's say it's 1 foot, 6 inches.

Find the Unit Run: Subtract the overhang from the total run: 14 feet, 6 inches - 1 foot, 6 inches = 13 feet. Convert this to inches: 13 feet x 12 inches/foot = 156 inches.
 
Determine the Number of Steps: Divide the unit run by 12 inches (since each step represents 12 inches of run): 156 inches / 12 inches/step = 13 steps.

Step Off and Adjust: Step off 13 increments as described earlier. Now, for the final step, instead of moving the square 12 inches, move it the remaining 6 inches to account for the extra inches in your total run.

How To Layout Common Roof Rafter With Framing Square Step Off Method - Part One

Back To Roof Framing Construction Math
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