Gambrel Roof Truss Plans

Gambrel roof trusses are a popular style used often in barn or garage construction.

Gambrel roof truss plans.

Build a temporary truss jig by screwing 2 long 2 4 s to adjacent edges of the floor at 90 degrees to each other. This series of diagrams shows just how the second floor lays out in each of our six different truss widths. All of our plans are drafted in autocad and our truss designs are engineered for a standard 100 psf snow load 140 mph wind load seismic category d and exposure c to meet or exceed the latest 2018 irc ibc specs. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof.

The same thing is true for the bridge of the truss. This way the floor acts as a giant builders square. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth.

With no interior walls or support posts our engineered gambrel truss design optimizes useable upstairs interior space. Gambrel roofs are symmetrical with two slopes on each side of the roof. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a. The double bend in the trusses makes for a more spacious area that affords more usable square footage than the average roof truss.

Note that the gambrel style roof allows for a larger attic space with a 9 9. The more complex the truss framework is the greater quantity of these joints will be required. 30 gambrel attic truss with a 24 12 lower pitch and 7 12 upper pitch with 12 overhang. These steel joints are needed to support the overall truss.

This truss will be used in planset. Because of the number of bends in these trusses each one is custom made to specifically fit the roof that it will be installed within. Here briefly is how the trusses and the gambrel roof formed from them went together. This design also maximizes useable second floor space.

Well let s face it it s a very attractive roof design but there are practical considerations as well. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Ceiling and 18 2 width.

Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. Due to the overall height the truss is manufactured as a piggyback truss to allow for transportation. Align them to the edges of the floor and attach with 3 to 4 screws along their length.