Maximum Span For 2x10 Roof Rafter

Another option are 2 x 8 rafters spaced 24 inches o c.

Maximum span for 2x10 roof rafter.

Secondly how far can a rafter span. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. Live load is weight of furniture wind snow and more.

The pitch of the roof would be about a 4 pitch. There would be interior framing inside the addition but there would be an area of about 15 x 16 that would be clear. 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. 1 psf lb f ft 2 47 88 n m 2.

Dead load weight of structure and fixed loads 15 lbs ft 2. The table states that 2 x 6 rafters spaced 16 inches on center o c can span a maximum distance of 13 feet 5 inches. Gable walls need to be strapped to the roof at the maximum 2m centres using 30 x 5m galvanised mild steel straps. 2 are indicated below.

1 ft 0 3048 m. For pitched roofs flat roofs and ceiling joists. My guess is that i would use 2x8 s for the rafter ties ceiling joist and also 2x8 s for the rafters. Thanks for the responses yes the ridge will be centered on the 16 span.

Also available for the android os. Surveyors and structural engineers utilise data from tables below to help calculate the correct size strength and centres of roof timbers for the required spans and loadings. Maximum clear span of rafters in metres for roof pitches of between 15 and 45 degrees roof pitch between 15 and 22 5 degrees with rafter spacing strength class c16. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no.

This table is simply a sample and may not be valid for your region. Span calculator for wood joists and rafters also available for the android os. Surveyors span tables for designing roof rafters. A 2 2x10 can span 10 feet and so on.

The spans in this table are based on a maximum supported rafter span of 16 feet where the supported span is the total horizontal distance spanned by the roof rafters divided in half not the diagonal distance or the length of the rafter. 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.