Lean To Roof Rafter Length

Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement.

Lean to roof rafter length.

Rafters are commonly spaced about 24 inches 61 cm apart. Input the rafter span on the flat eave overhang and pitch of the roof. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof. Pitched roof rafter lengths for gable hip lean to roof construction how to calculate the length of common roof rafters you are ready to set out and cut the common rafter lengths as soon as the wall plates have been squared levelled and fixed strapped down onto the brickwork.

Click the button to calculate the stock size needed for this job. I cut rafters out of 2x8s frame this pole barn lean to. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. While making roofing for your house with the roof rafters it is important to know the rafter length to make the roof seat perfectly on the rafter.

After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need. The number of rafters needed will be determined by the length of your roof. Includes result for hip valley factor slope factor and the roof slope in degrees.

The run for a lean to shed rafter ending into a wall should account for the ridge board nailed into the wall where the tops of the rafters rest into. This calculator is to be used as an estimating tool only. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. In other words if there is a 1 1 2 ridge board nailed into the wall and the width of the lean to is 96 then the run will be 94 1 2 96 1 1 2 94 1 2.

If you ve wondered how to frame a lean to roof off a pole barn this video will show you how i did it. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.