Metal Patio Roof Beam Span Table

The smallest beams for patio covers are typically 4 by 6.

Metal patio roof beam span table.

In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts. For the initial calculation f can be estimated at 1 000. Stramit patio roofing profiles width. 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.

Flat roof span tables allow for a maximum roof pitch of 5º. Fill in the parts of the formula that are already known. Roof pitch use recommended minimum roof pitches as specified by roof sheet supplier. 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.

Colorbeam light structural steel beams provide an ideal roof framing system for all outdoor home improvement projects such as patios carports verandahs and awnings. 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. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts.

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. A 4 by 10 can usually span up to 12 feet between posts. The overlapping sections of the beam provide extra rigidity allowing longer spans between supports. In the example the beam spans the 10 foot width of the roof.

By referring to the selection tables determine which of the span tables a to k is appropriate. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. F stands for the beam s fiber strength in bending which depends on the species of wood. 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 figures are based on quality materials. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.