Roofing Australian Standards Timber Span Tables

1 refer to general notes for information that is relevant for all span tables.

Roofing australian standards timber span tables.

Joists crippled over supports shall be considered as single span joists. Standards australia is committed to maintaining a contemporary and relevant catalogue of australian standards which add to the net benefit of the australian community. The aged standards review is one of the ways in which standards australia gives effect to that commitment. R cb150 16 beam span table used w 3600 width of frame rafter span χ 6410 fascia beam span the cb150 16 beam achieves the 6000mm span for the fascia beam and can be used for the rafters.

Table assumes a maximum flooring mass of 40kg. Member span is not suitable for rafter spacing greater than 600mm. 2 denotes 600 mm rafter spacing only. Required size for a given span.

A maximum roof pitch of 25 degrees is assumed. Member tables for seasoned timber stress grade f17. Lintel span sheet roofing tiled roofing roof load width rlw mm 1500 2100 4500 7500 1500 2100 4500 7500 maximum span of lintel mm 90 x 35 600 2000 1800 1400 1200. 3 for design parameters refer to figure 6 22 as1684 2 and 3.

Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.