Patio Roof Spans

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

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 maximum beam rafter spans home. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. Maximum roof slope is 5 for monoslope and 22 5 for pitched roof.

The smallest beams for patio covers are typically 4 by 6. F stands for the beam s fiber strength in bending which depends on the species of wood. L stands for the span of the beam in feet. 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.

In the example the beam spans the 10 foot width of the roof. These are specific to the area where you live. Patio cover plans build your or deck. That depends on the design load of your roof and the span of your rafters.

Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. A 4 by 10 can usually span up to 12 feet between posts. 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.

Single ply beam solution professional deck builder. Patio width is no less than 2 1m and length is no less than 3 5m. Patio roof beam calculator. Also available for the android os.

If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. Please plete the items below and read general notes. Patio height hc must always be less than roof height h. The tables below give maximum spans for rafters and beams.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts. To determine the design load of your roof consult your local building code. Span tables for canada building construction diy chatroom.