Roof Span Tables Uk

Span tables can be used to determine the size of a timber member of a particular strength class required for a given span.

Roof span tables uk.

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. 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. For pitched roofs flat roofs and ceiling joists. Maximum clear span of rafters in metres for roof pitches of between 15 and 45 degrees.

This span table is to the format and methodology given in bs 5268 7 2. These span tables are the equivalent of other industry standard span tables and are calculated to the same standards. Surveyors span tables for designing roof rafters. This table uses commonly available uk regularised timber depths.

Contact a building control officer for advice. 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. These spans were calculated using our flat roof joist calculation engine. They also tell you what the maximum spacing should be between each section or timber member.