Shed Roof Rafter Span

Live load 20 lbs ft 2 956 n m 2.

Shed roof rafter span.

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. For light load roofs 24 o c. 2x4 span 8 feet with a 20 lbs psf live 10 dead load. Also available for the android os.

That alone is over kill. An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. 2 are indicated below. Not need to waste wood boys its not like it grows on trees.

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. Span calculator for wood joists and rafters also available for the android os. Shed roof a shed roof slopes in one direction only. Dead load weight of structure and fixed loads 15 lbs ft 2.

If you look at the rafter span chart you ll notice that 2x4s can be used for rafters on spans up to 11. Why not just use 1 2 ply so the h clips and other roffing products work with the roof like drip cap and so on. 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. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

1 in 25 4 mm. 1 psf lb f ft 2 47 88 n m 2. Live load is weight of furniture wind snow and more. So a 2x4 as a rafter no engineering plate to ridge is good for a shed 16 span at 2 foot centers amusing a center ridge.

1 ft 0 3048 m. For heavy loads 2x4s can span up to 5. For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2. Consult local building codes for snow load capacity and reference the span tables for joists and rafters published by the american wood council awc as a general rule roofs that have a high human occupancy rate should be framed with rafters every 16 structures such as sheds or barns can be frames with rafters every 24.

2 4 rafters can span up to 7. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. Anything beyond that you are looking at using 2x6s for most sheds. The pitch and span of your roof will dictate how long of a rafter you ll need use maximum span calculator to help you find your rafter size.