Timber Roof Beam Span Tables

Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.

Timber roof beam span tables.

Keep in mind that these are maximums in other words shortening spans slightly will result in a more solid structure. View allowable load tables. View joist rafter tables. 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.

View size selection tables. Surveyors span tables for designing roof rafters. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders. 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.

Window door garage door headers supporting roof loads only. The figures are based on quality materials. 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. For lesser grades spans should be shorter.

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. 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. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Span calculator for wood joists and rafters also available for the android os. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Also available for the android os.