Rafter Length Shed Roof Truss Design Calculator

Number of rafters and their dimensions.

Rafter length shed roof truss design calculator.

Custom gambrels allow complete flexibility of design with all input fields enabled and few constraints on the shape of the roof other than the lower slope must be greater than or equal to the upper slope. Enter this measurement into the calculator and select a roof pitch and the length of the rafter will automatically returned along with the rise. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. This online truss calculator will determine the all in cost of your truss based on key inputs related to the pitch width and overhang of your 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. Shed roof a shed roof slopes in one direction only. Allow for ridge thickness when determining rafter run to outer wall. Click the button to calculate the stock size needed for this job.

This calculator is to be used as an estimating tool only. Easy rafters is designed to calculate shed roofs that are framed to a ledger board nailed against a vertical wall not freestanding shed roofs supported by walls at both ends. Rafter length using angle v r 2cos a 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. See rafter run to outer wall calculator below.

Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through. Includes result for hip valley factor slope factor and the roof slope in degrees. 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. Dimensions and area of a shed roof materials quantity for it the roof angle pitch.

Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. The important point to keep in mind when you use your truss calculator is that every truss calculation is completely unique and is based on the size of your roof and its specific dimensions. Input the rafter span on the flat eave overhang and pitch of the roof. Half building width minus 1 2 ridge thickness.