Roof Framing Geometry

Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon.

Roof framing geometry.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. And the line length measurement from the roof peak to the building wall is the hypotenuse. For complex roof framing trigonometry or geometry must be used. 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. 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. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.

The run or half the building span is the base of the triangle. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. 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.

There is more trigonometry in this book than all of the roof framing books written in english combined.