Flat Roof Timber Joist Span

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.

Flat roof timber joist span.

Although i think you can get 6 metre joists in 6 x 2. If you want 6 joists you need a steel midway. Two rows or more when the span exceeds 4 5m. Strutting should be either.

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. Usually 400 450 or 600mm but any value can be used up to 610mm max 1 2 timber strength class and joist size automatically calculate sizes suitable for supporting the loads below. Eurocode 5 span tables for solid timber members in floors ceilings and roofs for dwellings 3rd edition. They also tell you what the maximum spacing should be between each section or timber member 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 05 2 67 3 22 3 77 4 31 4 85 assumptions at 400mm centers.

Span calculator for wood joists and rafters also available for the android os. Also available for the android os. 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. This is the distance between joist centres.

For timber floors between homes. These span tables apply only to flat roof and roof with a slope of up to 10 degrees. Span tables for solid timber joists. The section sizes are based on regularised als or cls timber.

One row when the span of the joists exceeds 2 5m. Herringbone type timber 38mm x 38mm. Joists for that span would normally be around 9. The lengths and sizes of joists vary depending on the species and quality of the lumber used.

You def cant put a joint in the timber. Tables 1 and 2 in this chapter are derived from the trada technology ltd.