Gable Roof Framing Calculator - Gable Roof Plans Metric

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Wall Length		Rafter Thickness
Wall Width		Rafter Depth
Roof Angle		Ridge Thickness
Overhang (level)		Rafter Spacing
Overhang Gable		Adjust Equal SpacingExact spacing
End Rafters Set-in
Extend Ridge		Birdsmouth Seat
Bottom Plumbcut		Running Setout Points

Battens		Top Batten Set-in from top end of Rafter NOT Ridge Centre
Batten Spacing		Top Batten Set-in
Batten Width		Bottom Batten Set-in
Adjust Equal Batten SpacingExact Batten Spacing

RunTalk Android App - Speaks Running Measurements while you mark them out! (free)

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.

At an angle of 15 °, the overall height above outer wall is 907 mm
The ridge top is 901 mm above top of wall.
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
Roof Volume (top of wall/plate to under rafters) = 28.94 m³
Roof Volume (top of wall/plate to top of rafters) = 36.39 m³

You need: 1 Ridge @ 13200 × 50
30 Rafters @ 3728 × 100 × 50

Rafter Detail (new window)

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If Plumb Cut =		?
If Seat Cut =		?