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With a building length of 12000 mm and width of 6000 mm, a roof overhang of 600 mm the roof is 13200 mm long and 7200 mm wide. With an angle of 15 °, the overall height above outer wall is 907 mm. The roof area is 98.39 m². Rafter spacing is 853.6 mm (Next larger spacing = 919.2 Next smaller = 796.7). 41.3 lineal metres eave @ 600 mm overhang = 24.8 m² level, ( or 25.3 m² with side eaves = 15 ° ). Gable Area (under rafters) = 2.41 m²
You need: 1 Ridge @ 13200 × 50
30 Rafters @ 3701 × 100 × 50
Check box (top) for bottom plumb cut
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