Skillion Roof Rafter Span Tables

If you look at the rafter span chart you ll notice that 2x4s can be used for rafters on spans up to 11.

Skillion roof rafter span tables.

Skillion lean to roof profile diagram quest. 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. Choose rafter spacing from table 10 1 the options are 480 600 or 900 mm. The pitch and span of your roof will dictate how long of a rafter you ll need use maximum span calculator to help you find your rafter size.

Rafter span 3 000 m. Attached flat roof 1ao page14. Select and re calculate to display. Design of single span rafters in roofs in houses office buidlings schools and other structures.

The imposed uniformly distributed live load in the main span. Sheet roofing tiled roofing roof load width rlw mm 1500 2100 4500 7500 1500 2100 4500 7500. 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. Step 1 rafter spacing.

Select output fraction precision decimal inch or metric mm. Maximum span of bearer mm upper floor load width 3600mm continued continuous spans. This is set by the roof use you selected in the previous screen and cannot be modified. 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.

Loads are calculated in accordance with table 3 1 of as nzs 1170 1 2002. Skillion roof rafter detail diagram with all dimensions and birds mouths scale.