Roofing Australian Standards Timber Span Tables

Spacing should be interpreted as the centre to centre distance between adjacent parallel members.

Roofing australian standards timber span tables.

Member span is not suitable for rafter spacing greater than 600mm. 1 refer to general notes for information that is relevant for all span tables. Reading off the empty under table with h 5m hc 2 5m span table c will be used to determine the spans. Construction details should be in accordance with as1684 2.

Roof load width rlw and floor load width flw can be determined from as1684 or from the images below. Technical diagram span tables f7 rafters on page 35 30mm m aximum allow able sp ans mm sheet roof spacing mm rafter size 600 760 900 1000 1200 66 x 30 1250 1150 1050 1000 950 90 x 30 1650 1550 1550 1400. The aged standards review is one of the ways in which standards australia gives effect to that commitment. Joists crippled over supports shall be considered as single span joists.

Required size for a given span. A maximum roof pitch of 25 degrees is assumed. 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. Member tables for seasoned timber stress grade f17.

Step 4 assume the wind classification for the area is n1 and the roofing profile is stramit corrugated cladding 0 48mm bmt thickness in a single span configuration. 3 for design parameters refer to figure 6 22 as1684 2 and 3. 2 denotes 600 mm rafter spacing only.