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Gable Roof Framing Calculator - With Running Setout Points - Metric



Wall Length Rafter Thickness
Wall Width Rafter Depth
Roof Angle Ridge Thickness
Overhang (level) Ridge Depth
Overhang Gable Rafter Spacing
End Rafters Set-in Rafter Spacing Type
Birdsmouth Seat Birdsmouth Seat Cut diagram

Possible Alternate Equal Rafter Centres

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Scale

Gable roof framing calculator plan diagram with full dimensions

Trim rafter tails after placement For a good straight fascia, add an extra 20 mm or so to the tails of all your rafters (total length). After they're up, you can snap a line to mark and trim the tails in a nice straight line, to make up for any ridge warp or marking, cutting and fixing errors.



All running measurements are 'and on', from start point to near side of rafter.
Running Ridge: Mark out


Running Wall: Mark out


Left click, release then drag to measure at scale in diagram below - Enlarge diagram scale for more accurate measurements.

Angle Scale

Gable roof profile diagram with all angles, dimensions and volumes

Gable roof common rafter detail diagram with all dimensions and birds mouth

Rafter Detail (new window)



DON'T BREATH THE DUST If you're cutting blocks, concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks

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