Trada Roof Rafter Span Tables

Trada s span tables have been in existence for decades now helping designer and builders quickly look up the right sized softwood members for domestic projects. 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. Span tables for solid timber members in floors ceilings and roofs for dwellings.

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Free trada span tables pdf supersedes.

Trada roof rafter span tables.

In 1991 the span tables were paid for by government and were included within the building regulations. For pitched roofs flat roofs and ceiling 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. Surveyors span tables for designing roof rafters.

2nd edition trada. Trada document span tables for solid timber members in floors ceilings and roofs for dwellings or ask your building control officer for advice. Part 1 introduction contents list of. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run.

Maximum clear span of rafters in metres for roof. Contains section sizes and spans for solid timber members in floors ceilings and roofs excluding trussed rafter roofs for dwellings. 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.

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