Flat Roof Timber Span Tables Uk

Span tables flat roof joists 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.

Flat roof timber span tables uk. All the figures are based on the normal loading conditions. Span tables for solid timber joists. Subject ceilings and flat roofs timber sizes and construction details 09 issued 01 04 13 rev page 1 of 2 the following tables give details of the allowable spans and spacing for some of the more common timber sizes used in ceiling and flat roof construction. Surveyors span tables for designing roof rafters.

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. Span tables for solid timber members in floors ceilings and roofs for dwellings. For pitched roofs flat roofs and ceiling joists. They also tell you what the maximum spacing should be between each section or timber member 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.

For timber floors between homes. Tables 1 and 2 in this chapter are derived from the trada technology ltd. Take a look here. These span tables apply only to flat roof and roof with a slope of up to 10 degrees.

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. 2nd edition trada. 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. Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.

This document has been split into. Flat roof with no permanent access and altitude not exceeding 100m 0 75 kn m udl 0 9 kn point load most areas exceeding 100m but not exceeding 200m excluding parts of scotland pennines north east england refer to bs 6399 3 1 kn m udl 0 9 kn point load. Should refer to trada document span tables for solid timber members in floors ceilings and roofs excluding trussed rafter roofs for dwellings or ask your lbc surveyor for advice. The section sizes are based on regularised als or cls timber.

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. Free trada span tables pdf supersedes.