Timber Roof Beam Span Tables

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

Timber roof beam span tables.

Also available for the android os. Keep in mind that these are maximums in other words shortening spans slightly will result in a more solid structure. For lesser grades spans should be shorter. Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.

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. Surveyors span tables for designing roof rafters. Span tables for flat roof joists to bs 5268 7 2 imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3. 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. View size selection tables. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders. Notches are not to exceed 0 125 of the depth of the joist and are to be located between 0 07 and 0 25 of the span from the support.

These span tables apply only to flat roof and roof with a slope of up to 10 degrees. For pitched roofs flat roofs and ceiling joists. Surveyors and structural engineers utilise data from tables below to help calculate the correct size strength and centres of roof timbers for the required spans and loadings. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Window door garage door headers supporting roof loads only. The tables below give maximum spans for rafters and beams. Window door garage door headers supporting roof wall floor loads.