Gambrel Roof Jig

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

Gambrel roof jig.

From the inside corner of the jig measure up a distance of 1 2 g and place a mark on the inside face of the 2 4. Attach the second stop the same 1 2 g distance along the bottom of the jig. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Jigs used for easier gambrel truss construction if your shed wall studs are framed at 2 on center and you decide you want to go 16 on center with your trusses then you will need 2 top plates.

Attach the first stop here with two 2in drywall screws. Tongue and groove plywood to the roof trusses how to build a gambrel shed roof. Attach the third stop at distance g from the inside corner. Using this method it will take under an hour to cut all the 1x4 strips and gusset plates.

Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. It s just over 10. You must also use glue construction adh. Generally if your trusses are going to match up with your wall studs only one top plate is needed.