Flat Roof Joist Span Tables Uk

Other span tables are based on.

Flat roof joist span tables uk.

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. Joist breadth 47mm. Maximum slop3 10 deg. For pitched roofs flat roofs and ceiling joists.

These span tables apply only to flat roof and roof with a slope of up to 10 degrees. Flat roof joists rafters purlin. Surveyors span tables for designing roof rafters. Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.

Supporting imposed load for access and repair only. At least 40mm bearing on supports. The section sizes are based on regularised als or cls timber. This table uses commonly available uk regularised timber depths.

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 joists. For timber floors between homes. 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 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. 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. Tables 1 and 2 in this chapter are derived from the trada technology ltd. Span is clear span between supports.