Flat Roof Timber Joist Span

Although i think you can get 6 metre joists in 6 x 2.

Flat roof timber joist span.

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

This is the distance between joist centres. One row when the span of the joists exceeds 2 5m. 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.

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. Two rows or more when the span exceeds 4 5m. Also available for the android os. 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.

You def cant put a joint in the timber. Span tables for solid timber joists. Herringbone type timber 38mm x 38mm. If you want 6 joists you need a steel midway.

These span tables apply only to flat roof and roof with a slope of up to 10 degrees. Eurocode 5 span tables for solid timber members in floors ceilings and roofs for dwellings 3rd edition. The lengths and sizes of joists vary depending on the species and quality of the lumber used. Joists for that span would normally be around 9.

Strutting should be either. 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.