Roof Framing Geometry

And the line length measurement from the roof peak to the building wall is the hypotenuse.

Roof framing geometry.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. However it has over 1 000 geometric roof framing drawings in the book as well for carpenters that are not comfortable using trigonometry.

For complex roof framing trigonometry or geometry must be used. There is more trigonometry in this book than all of the roof framing books written in english combined. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. 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. 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. However it has over 1 000 geometric roof framing drawings in the book as well for carpenters that are not comfortable using trigonometry.

Gambrel roof framing geometry calculator metric this gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon.