Skillion Roof Rafter Span Tables

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.

Skillion roof rafter span tables.

Design of single span rafters in roofs in houses office buidlings schools and other structures. Skillion roof rafter detail diagram with all dimensions and birds mouths scale. Select output fraction precision decimal inch or metric mm. Step 1 rafter spacing.

This is a heavy roof so the 1200 mm column on the right side of the table is excluded it only applies to light roofs. Choose rafter spacing from table 10 1 the options are 480 600 or 900 mm. Skillion lean to roof profile diagram quest. Table 33 bearers supporting two storey loadbearing walls lower floor load width 900mm or 1800mm continued seasoned hardwood f17.

Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. This is set by the roof use you selected in the previous screen and cannot be modified. If you look at the rafter span chart you ll notice that 2x4s can be used for rafters on spans up to 11. Attached flat roof 1ao page14.

Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. Select and re calculate to display. Maximum span of bearer mm upper floor load width 3600mm continued continuous spans. Rafter span 3 000 m.

Anything beyond that you are looking at using 2x6s for most sheds. Loads are calculated in accordance with table 3 1 of as nzs 1170 1 2002.