Flat Roof Timber Joist Span

The section sizes are based on regularised als or cls timber.

Flat roof timber joist span. 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. 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. You def cant put a joint in the timber. Rafter and joist span faq.

Also available for the android os. Timber to be covered these span tables do not apply to timber which is fully exposed to the elements. These span tables apply only to flat roof and roof with a slope of up to 10 degrees. Although i think you can get 6 metre joists in 6 x 2.

Two rows or more when the span exceeds 4 5m. Herringbone type timber 38mm x 38mm. Joists for that span would normally be around 9. 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.

Eurocode 5 span tables for solid timber members in floors ceilings and roofs for dwellings 3rd edition. Span calculator for wood joists and rafters also available for the android os. The lengths and sizes of joists vary depending on the species and quality of the lumber used. This is the distance between joist centres.

If you want 6 joists you need a steel midway. For timber floors between homes. 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. 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.

Strutting should be either. Tables 1 and 2 in this chapter are derived from the trada technology ltd.