This calculator is to be used as an estimating tool only.
Shed roof rafter span calculator.
Click the button to calculate the stock size needed for this job.
Span calculator for wood joists and rafters also available for the android os.
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.
The preview window displays a dimensioned side view of the shed roof.
Input the rafter span on the flat eave overhang and pitch of the roof.
Also available for the android os.
To calculate a shed roof select shed from the roof type dropdown list or click on the corresponding button on the toolbar to calculate a shed roof.
Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.