Input the rafter span on the flat eave overhang and pitch of the roof.
Shed roof rafter span calculator.
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.
This calculator is to be used as an estimating tool only.
Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.
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.
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.
Also available for the android os.
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.