Patio Roof Beam Span Table

The figures are based on quality materials.

Patio roof beam span table.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. The total load is 4 000 pounds. Includes size and spacing tables for load bearing and links to related articles. 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. Fill in the parts of the formula that are already known. In the example the beam spans the 10 foot width of the roof. Jan 15 2017 a simple buying guide for beams and rafters that support patio roofs.

Spantec has prepared these tables for use by people skilled in the design and specification of the. Flat roof span tables allow for a maximum roof pitch of 5º. The tables permit a bearing length of up to 3 5 inches but since 1 5 is probably the worst case that you ll encounter for joist or rafter bearing it s a safe value. Tables 7 12.

Table 9 1 in span tables for joists and rafters figure 5 gives a required compression value of 237 psi for a span of 16 feet and bearing length of 1 5 inches. 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. For the initial calculation f can be estimated at 1 000. L stands for the span of the beam in feet.

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. Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications. Download a pdf. The tables below give maximum spans for rafters and beams.

The smallest beams for patio covers are typically 4 by 6. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. F stands for the beam s fiber strength in bending which depends on the species of wood.

In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.