Roof Span Tables Uk

Contact a building control officer for advice.

Roof span tables uk.

These spans were calculated using our flat roof joist calculation engine. 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. Size of joists mm clear span c16 joist m clear span c24 joist m 47 x 95 47 x 120 47 x 145 47 x 170 47 x 195 47 x 220 1 77 2 40 2 89 3 38 3 87 4 36 2 05 2 67 3 22 3 77 4 31 4 85 assumptions at 400mm centers. For pitched roofs flat roofs and ceiling joists.

Refer to approved document to part a of the building regulations on gov uk for heavier roofing materials or unusual loading conditions these tables may not be appropriate. Maximum clear span of rafters in metres for roof pitches of between 15 and 45 degrees. Surveyors span tables for designing roof rafters. Span tables for ceiling joists to bs 5268 7 3 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.

This span table is to the format and methodology given in bs 5268 7 2. This table uses commonly available uk regularised timber depths. They also tell you what the maximum spacing should be between each section or timber member. These span tables are the equivalent of other industry standard span tables and are calculated to the same standards.