Roof Rafter Design Calculator

This calculator is to be used as an estimating tool only.

Roof rafter design calculator.

Rafter length calculator calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. This is the distance between rafter centres. This calculator helps you make the rafters of the suitable sizes required for your roofing. Common rafter calculator rafter dimensions plumb cuts birds mouth dimensions cutting templates inch allow for ridge thickness when determining rafter run to outer wall.

If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Input the rafter span on the flat eave overhang and pitch of the roof. 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. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

Conclusions about the roof rafter length calculator the layout of your home or building will have a significant impact on the final design and slope of your roof. Half building width minus 1 2 ridge thickness. See rafter run to outer wall calculator below. Rafter is a sloping beam usually wood that supports a pitched roof.

Click the button to calculate the stock size needed for this job. 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. If you re thinking about replacing your roof with a new one you will need a roof truss calculator. To calculate a gambrel roof.

Plasterboard on the underside of the rafter. 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. The top rafter tab displays a dimensioned side view of the gambrel roof top rafter. 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.