Patio Roof Spans

You can determine the allowable spans of different rafter sizes and spacing from the span calculator by the american wood council.

Patio roof spans.

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. The smallest beams for patio covers are typically 4 by 6. Patio width is no less than 2 1m and length is no less than 3 5m. That depends on the design load of your roof and the span of your rafters.

Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. The tables below give maximum spans for rafters and beams. Patio roof maximum beam rafter spans home. Single ply beam solution professional deck builder.

The total load is 4 000 pounds. The number of supports beams or purlins affects the allowable span length. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. Span tables for canada building construction diy chatroom.

Please plete the items below and read general notes. These are specific to the area where you live. 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. A 4 by 10 can usually span up to 12 feet between posts.

Span calculator for wood joists and rafters also available for the android os. Patio cover plans build your or deck. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. In the example the beam spans the 10 foot width of the roof.

F stands for the beam s fiber strength in bending which depends on the species of wood. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Maximum rafter spans for a patio roof. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.

Maximum roof slope is 5 for monoslope and 22 5 for pitched roof. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. To determine the design load of your roof consult your local building code. Also available for the android os.