Gambrel Roof Rafter Angles

A gambrel roof is a popular roof style on many contemporary barns and sheds.

Gambrel roof rafter angles.

A gambrel style is often called a barn roof. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof. The drawings and the size of the rafters are generated in real time.

You will need to make 22 5 degree angle cuts on the rafter joist ends that mate up to the top plate or header. 45 degrees where the joists meet up with the top plate or header and 90 where the joists meet in the middle at the ridge board. Since the sum of the three angles in a gambrel roof is 180 degrees the angles you will need are as follows. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a.

Gambrel roofs are symmetrical with two slopes on each side of the roof. 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. Its double or sometimes triple slopes on each side of a peak provide more space inside the roof which is attractive to homeowners too.

If you plan on building and installing your own gambrel roof you ll have to draw out plans first to determine the proper dimensions. The calculator provides online calculate the length of rafters a gable roof. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. Online calculator produces an accurate calculation of the rafters online calculates the sizes of rafters for the roof.

A gambrel has four angles at the peak at the wall and where the two rafters or truss chords connect. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.