Rafter Length Shed Roof Truss Design Calculator

Half building width minus 1 2 ridge thickness.

Rafter length shed roof truss design calculator. See rafter run to outer wall calculator below. Common rafter elevation if you are calculating rafter length from the center of the ridge beam as shown below you will need to subtract half of the thickness of the ridge beam from the top end of the rafter. For example if the ridge beam is 1 5 inches thick subtract 3 4 of an inch from the overall rafter length. 24 feet 6 1 2 inches.

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. Enter this measurement into the calculator and select a roof pitch and the length of the rafter will automatically returned along with the rise. 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. 24 feet 6 inches.

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. Rafter length calculator calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. It will use the current cost of wooden rafters based on the average price found at home improvement stores. 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.

Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. Use our gable roof truss calculator for labor savings when planning to replace rafters with manufactured roof trusses. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through.

Connector plates are generally 16 gauge to 20 gauge depending on truss design requirements. The calculator provides online calculation of the rafters for shed roof according to your original dimensions. 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. Allow for ridge thickness when determining rafter run to outer wall.

For top chord length rafter length calculator. Includes result for hip valley factor slope factor and the roof slope in degrees.