2x4 Rafters Shed Roof Rafter Span Calculator

For standard shed roof rafter spacing see rafter span chart.

2x4 rafters 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. Shed roof a shed roof slopes in one direction only. 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. If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters.

Includes result for hip valley factor slope factor and the roof slope in degrees. Half building width minus 1 2 ridge thickness. An syp rafter can span 11. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.

See rafter run to outer wall calculator below. 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. Roofing calculators are commonly used by professionals.

The roof rafters provide integral structural support to the roof. Also available for the android os. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. For instance 2 grade 2x4s at 16 on center will span just over 9.

If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. As mentioned above a 2 4 spf shed roof rafter can span 11. Span calculator for wood joists and rafters also available for the android os.

If you d rather not purchase. If you live in an area that requires a shed roof rafter to support a heavy load then an spf rafter can only span 7. An syp rafter can span 8. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement.

Both of these are for light roof loads. A manual with rafter length tables.