2x4 Rafters Shed Roof Rafter Span Calculator

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.

2x4 rafters shed roof rafter span calculator. Shed roof a shed roof slopes in one direction only. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. An syp rafter can span 11. Includes result for hip valley factor slope factor and the roof slope in degrees.

Allow for ridge thickness when determining rafter run to outer wall. Also available for the android os. Roofing calculators are commonly used by professionals. For standard shed roof rafter spacing see rafter span chart.

Calculating a shed roof with easy rafters. 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. Span calculator for wood joists and rafters also available for the android os. Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through.

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 live in an area that requires a shed roof rafter to support a heavy load then an spf rafter can only span 7. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. The roof rafters provide integral structural support to the roof.

Half building width minus 1 2 ridge thickness. Both of these are for light roof loads. As mentioned above a 2 4 spf shed roof rafter can span 11. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement.

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 add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. An syp rafter can span 8. See rafter run to outer wall calculator below.

A manual with rafter length tables. For instance 2 grade 2x4s at 16 on center will span just over 9.