Flat Roof Joist Spans Uk

Tables 1 and 2 in this chapter are derived from the trada technology ltd.

Flat roof joist spans uk.

Also available for the android os. Eurocode 5 span tables for solid timber members in floors ceilings and roofs for dwellings 3rd edition. For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine. 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 220 1 77 2 40 2 89 3 38 3 87 4 36 2 04 2 75 3 47 4 20 4 93 5 66 floor joists flat roof joists assumptions at.

For pitched roofs flat roofs and ceiling joists. This demo version is fixed at 1m clear span. Span tables for solid timber joists. Usually 400 450 or 600mm but.

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. Other span tables are based on the guidance given in bs 5268 7 1 which is a uniformly distributed load of 1 5kn m for spans greater than 2400 mm and 3 6 kn load per metre width of floor for spans less than 2400 mm to ensure that very small joist sizes do not result from the calculations for smaller spans. These span tables are the equivalent of other industry standard span tables and are calculated to the same standards. 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.

Rafter and joist span faq. 1 enter joist details 1 1 span and joist spacing. Span calculator for wood joists and rafters also available for the android os. If supporting lightweight partitions running parallel to joists provide two additional joists under each partition.

For timber floors between homes. 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. These spans were calculated using our flat roof joist calculation engine. The lengths and sizes of joists vary depending on the species and quality of the lumber used.

Surveyors span tables for designing roof rafters. 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. The full version allows any size. The section sizes are based on regularised als or cls timber.

This table uses commonly available uk regularised timber depths. Suitable for uk building regulation approval.