Timber Roof Joist Span Tables Uk

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.

Timber roof joist span tables uk.

Span calculator for wood joists and rafters also available for the android os. Other span tables are based on. Floor joist span tables for surveyors floor construction. They also tell you what the maximum spacing should be between each section or timber member.

Free uk span table for flat roof joists to bs 5268 7 2 c16 1 5 kn m load timber beam calculator permissible clear spans for flat roof joists to bs 5268 7 2. The floor joist span tables are based on the loadings given in the amended version of bs 6399 1 which is an imposed load of either a uniformly distributed load of 1 5 kn m or a concentrated load of 1 4 kn. Flat roof joists rafters purlin. Timber floor joists shall be adequate for the spans and loads and be correctly installed.

Surveyors span tables for designing roof rafters. 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. Usually 400 450 or 600mm but any value can be used up to 610mm max usually 400 450 or 600mm but any value can be used up to 610mm max 1 2 timber strength class and joist size.

This is the distance between joist centres. 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. Span tables span tables can be used to determine the size of a timber member of a particular strength class required for a given span. Also available for the android os.

The weight of the timber floor itself consists of the timber joists the plasterboard ceiling underneath it except for suspended timber ground floors the floorboards and the nails or screws used to fix both of the aforementioned coverings. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.