Patio Roof Spans

Maximum rafter spans for a patio roof.

Patio roof spans.

In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Please plete the items below and read general notes. Patio roof beam calculator. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts.

In the example the beam spans the 10 foot width of the roof. Maximum roof slope is 5 for monoslope and 22 5 for pitched roof. Span calculator for wood joists and rafters also available for the android os. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall.

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. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. Also available for the android os. Patio height hc must always be less than roof height h.

Patio roof maximum beam rafter spans home. The number of supports beams or purlins affects the allowable span length. Patio roof beam calculator roof beam span calculator jackdecor co timber trusses beams patio covers and decks santa clarita christopher french beam span table douglas fir elijahhome co patio roof. A 4 by 10 can usually span up to 12 feet between posts.

Patio width is no less than 2 1m and length is no less than 3 5m. The tables below give maximum spans for rafters and beams. F stands for the beam s fiber strength in bending which depends on the species of wood. You can determine the allowable spans of different rafter sizes and spacing from the span calculator by the american wood council.

To determine the design load of your roof consult your local building code. These are specific to the area where you live. That depends on the design load of your roof and the span of your rafters. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.

L stands for the span of the beam in feet. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts. Single ply beam solution professional deck builder. The smallest beams for patio covers are typically 4 by 6.