Shed Roof Rafter Span

1 psf lb f ft 2 47 88 n m 2.

Shed roof rafter span.

For light load roofs 24 o c. 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. For heavy loads 2x4s can span up to 5. 1 in 25 4 mm.

Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. 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. Not need to waste wood boys its not like it grows on trees. 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.

Live load is weight of furniture wind snow and more. Dead load weight of structure and fixed loads 15 lbs ft 2. That alone is over kill. Also available for the android os.

Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center. Live load 20 lbs ft 2 956 n m 2. If you look at the rafter span chart you ll notice that 2x4s can be used for rafters on spans up to 11. 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.

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. 2x4 span 8 feet with a 20 lbs psf live 10 dead load. Anything beyond that you are looking at using 2x6s for most sheds.

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. 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. 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. Span calculator for wood joists and rafters also available for the android os.

Instead of over building why not make the shed bigger with that size lumber. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. 2 4 rafters can span up to 7. 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.