Flat Roof Steel Truss Span Tables

Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope.

Flat roof steel truss span tables.

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. 05425 cold formed steel trusses roof truss spans every trussteel roof truss is a custom design based upon the unique load span bearing use and code criteria of a particular project. Roof truss span chart. Flat roof span tables allow for a maximum roof pitch of 5º.

Intermediate bearing simple span trusses header beam pocket floor truss supporting header beam. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6. The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses. Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches.

The more complex the truss framework is the greater quantity of these joints will be required. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Roof pitch use recommended minimum roof pitches as specified by roof sheet supplier. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge.

Metal plate connected wood trusses hib 91 by permission of truss plate institute inc. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. 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. Roof floor truss manual 7 31 08 10 43 am page 11.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. You can use sbca s span charts to roughly determine truss sizes available. The tables below give maximum spans for rafters and beams. These steel joints are needed to support the overall truss.

The figures are based on quality materials. Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration. The same thing is true for the bridge of the truss.