Roof Framing Geometry

For complex roof framing trigonometry or geometry must be used.

Roof framing geometry.

The run or half the building span is the base of the triangle. For complex roof framing trigonometry or geometry must be used. Roof framing geometry trigonometry for polygons polygons in mathematical context polygons in carpenters mathematical context central angle pi 2 n working angle pi 2 n 2 plan angle pi central angle 2 exterior angle plan angle 2 s is the length of any side of the polygon n is the number of sides. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. The rise or height of the roof at its peak is the altitude of the triangle. And the line length measurement from the roof peak to the building wall is the hypotenuse. There is more trigonometry in this book than all of the roof framing books written in english combined.

Gambrel roof framing geometry calculator metric this gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. There is more trigonometry in this book than all of the roof framing books written in english combined. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.