Metal Patio Roof Beam Span Table

In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

Metal patio roof beam span table.

For the initial calculation f can be estimated at 1 000. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. Stramit patio roofing profiles width.

If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. Step 4 using the appropriate span table a to k and the as4055 wind classification for the location and topography determine the span spacing between supports for the selected roofing profile and thickness. F stands for the beam s fiber strength in bending which depends on the species of wood. In the example the beam spans the 10 foot width of the roof.

A 4 by 10 can usually span up to 12 feet between posts. Roof pitch use recommended minimum roof pitches as specified by roof sheet supplier. Colorbeam light structural steel beams provide an ideal roof framing system for all outdoor home improvement projects such as patios carports verandahs and awnings. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. The tables below give maximum spans for rafters and beams. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. Posts these span tables are designed for a minimum post size of 50 x 50 x 2 5mm up to a maximum height of 3 0m.

The overlapping sections of the beam provide extra rigidity allowing longer spans between supports. L stands for the span of the beam in feet. Flat roof span tables allow for a maximum roof pitch of 5º. The figures are based on quality materials.

The smallest beams for patio covers are typically 4 by 6. Fill in the parts of the formula that are already known. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.