Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.
Shed roof rafter span calculator.
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.
Also available for the android os.
Rafter length using pitch v r 2 sqrt 1 p 2 where v overhang r roof span p pitch use our online rafter length calculator to quickly compute the length of the shed roof rafter by entering the measurements of overhead length of roof span pitch or angle.
Span calculator for wood joists and rafters also available for the android os.
Click the button to calculate the stock size needed for this job.
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.
Input the rafter span on the flat eave overhang and pitch of the roof.
This calculator is to be used as an estimating tool only.