Directory Metric or Imperial

Gable Roof Framing Calculator - With Running Layout Points - Imperial



Wall Length Rafter Thickness
Wall Width Rafter Depth
Roof Angle Enter angle in degrees directly or select pitch from dropdowns to calculate and enter angle °   in 12 Ridge Thickness
Overhang (level) Ridge Depth
Overhang Gable Rafter Spacing
Birdsmouth Seat   Birdsmouth Seat Cut diagram Rafter Spacing Type
End Rafter Setin
Actual Physical Sizes All measurements are actual physical finished sizes.

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Gable roof framing calculator plan diagram with full dimensions

Trim rafter tails after placement For a good straight fascia, add an extra inch or 2 to the tails of all your rafters (total length). After they're up, you can flick 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

Angle

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

Scale

Gable roof profile diagram with all angles, dimensions and volumes



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

DON'T BREATH THE DUST If you're cutting 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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All calculators on this site are geometric only.
Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.


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