Rafter Length guide
Rafter Length: Printable Job-Sheet Workflow
The rafter length job sheet preserves the measured inputs, rafter length = √(run² + rise²) plus the sloped overhang, the unrounded result, the issued field value, and the source checked at the time of release. A project identifier, author, review date, and revision state prevent an older calculation from remaining in use after conditions change.
This topic now belongs to the complete guide
Rafter length is the geometric base for a later layout that includes ridge treatment, birdsmouth location, bearing, tail shape, fascia line, and site trimming. Keeping those additions outside the first triangle calculation makes it possible to identify whether an error came from geometry or joinery.
The issued sheet carries a project identifier, author, date, revision mark, input list, formula, unrounded result, practical issued value, and checked source. Superseded copies are removed from the work area, and any field change that alters an input creates a new calculation rather than a handwritten change to the final number.
- Attach the printable reference at /charts/roof-pitch-angle to the calculation record.
- Show inputs with units, formula, unrounded result, issued result, and source.
- Remove superseded sheets from the work area when a revision is released.
For this tool, the calculation method is rafter length = √(run² + rise²) plus the sloped overhang. The consolidated page keeps this topic beside the worked method, material checks, source boundary, and printable record.
Last reviewed .