Flat Roof Timber Span Tables Uk

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.

Flat roof timber span tables uk.

Take a look here. 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. 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. For timber floors between homes.

The section sizes are based on regularised als or cls timber. Timber to be covered these span tables do not apply to timber which is fully exposed to the elements. Span tables for solid timber members in floors ceilings and roofs for dwellings. Maximum clear span of flat roof joists in metres for sc3 timber spacing between joists size of roof joist 400mm 450mm 600mm 47 x 97 1 84 1 81 1 74.

Free trada span tables pdf supersedes. 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. 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. Calculations are also given for canted purlins supporting roof sheeting or cladding and for flat roof joists.

Tables 1 and 2 in this chapter are derived from the trada technology ltd. 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. Surveyors span tables for designing roof rafters. These span tables apply only to flat roof and roof with a slope of up to 10 degrees.

Eurocode 5 span tables for solid timber members in floors ceilings and roofs for dwellings 3rd edition. All the figures are based on the normal loading conditions. This document has been split into. Span tables for solid timber joists.

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. 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.