Gambrel Roof Rafter Layout

Purlins joints are used slopes are fixed and the length of the top and bottom rafters including overhang will always be equal.

Gambrel roof rafter layout.

Trace and cut osb or plywood joints to connect the rafter pieces. The starwood gambrel rafter can be used to give your building the classic barn look or can be used for an economical storage solution. How to build perfect barn style gambrel roof trusses. Design is flexible enough to fit your own design needs.

Trace the top of the joint so the angle is at the same degrees as where the rafters connect. This approach conforms to my general design philosophy when in comes to the structural design of houses. Click here to buy the plans to build this tall barn style shed with loft for only 9 97. Build the trusses now because the empty floor will be part of your temporary truss jig.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. This gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Volume of building equal to gothic type building. The numbers vary depending on your local design wind speed zone but the bottom line is that you can use the same hardware here that you would use if the roof were an ordinary 12 pitch roof with straight rafters.

Place a 6 in 12 in 15 cm 30 cm rectangular piece of osb or 3 4 in 1 9 cm thick plywood under the joint of an assembled rafter. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Then use a saw to cut the lines that you drew.