Flat Roof Joist Spans Uk

Span calculator for wood joists and rafters also available for the android os.

Flat roof joist spans uk.

These span tables are the equivalent of other industry standard span tables and are calculated to the same standards. 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. Eurocode 5 span tables for solid timber members in floors ceilings and roofs for dwellings 3rd edition. This is the distance between joist centres.

This table uses commonly available uk regularised timber depths. Span tables for solid timber joists. This span table is to the format and methodology given in bs 5268 7 2. For timber floors between homes.

Also available for the android os. 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. The lengths and sizes of joists vary depending on the species and quality of the lumber used. 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.

These spans were calculated using our flat roof joist calculation engine. 1 enter joist details 1 1 span and joist spacing. Surveyors span tables for designing roof rafters. 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.

Usually 400 450 or 600mm but. For pitched roofs flat roofs and ceiling joists. Rafter and joist span faq. The full version allows any size.

The section sizes are based on regularised als or cls timber. 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. Suitable for uk building regulation approval. Tables 1 and 2 in this chapter are derived from the trada technology ltd.

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. Flat roof joist calculator.