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.
Roofing australian standards timber span tables.
Joists crippled over supports shall be considered as single span joists.
Required size for a given span.
Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.
Member tables for seasoned timber stress grade f17.
3 for design parameters refer to figure 6 22 as1684 2 and 3.
1 refer to general notes for information that is relevant for all span tables.
2 denotes 600 mm rafter spacing only.
Reading off the empty under table with h 5m hc 2 5m span table c will be used to determine the spans.
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.
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.
Spacing should be interpreted as the centre to centre distance between adjacent parallel members.
A maximum roof pitch of 25 degrees is assumed.
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The aged standards review is one of the ways in which standards australia gives effect to that commitment.
Table assumes a maximum flooring mass of 40kg.