Gambrel Roof Specs

The upper slope is positioned at a shallow angle while the lower slope is steep.

Gambrel roof specs.

With no interior walls or support posts our engineered gambrel trussdesign optimizes useable upstairs interior space. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof. 28 gambrel attic truss with a 24 12 lower pitch and 7 12 upper pitch with 12 overhang. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.

Anything less than this will ultimately result in a roof that leaks if you plan on putting shingles on it. The barn roof style pictures shown with customer completed railing exterior steps and staining. When you are designing your shed roof whether it be a gambrel gable or saltbox you should never have any roof pitch less than a 3 12. There really isn t a standard however i know exactly what you mean about the squatty appearance of your modern gambrel trusses.

Note that the gambrel style roof allows for a larger attic space with a 9 ft. Stair detail scale 1 4 1 1. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. 20 x 24 gambrel garage.

This series of diagrams shows just how the second floor lays out in each of our six different truss widths. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Stairs to be constructed with the following materials. To learn more about what we do please view our specifications and our faq pages.

Ceiling and 17 ft. This truss will be used in planset. This means that for every 12 horizontal run you must have at least 3 of rise. The name comes from the medieval latin word gamba meaning horse s hock or leg.

2x6 kick plate anchor to concrete with expansion type anchor bolts 2x12 treads nosing 1 1 8 minimum 3 2x12 stringers required 2x12 blocking wafer board risers and 2x6 ledger. So you have a really steep bottom pitch and a really flat top pitch. Things you ll need ruler tape measure speed square chalk line saw 24 2 by 4 inches 5 1 cm 10 2 cm boards 6d nails 3 16d nails 8d common nails 5 inches 1 3 cm thick osb or plywood. With overhang selected drag slider to increment decrement birdsmouth seat width to suit.

A gambrel roof well let s face it it s a very attractive roof design but there are practical considerations as well. Most of your pre made trusses that are designed as a gambrel consist of roughly a 20 12 bottom pitch and a 4 12 top pitch. 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 roof. Due to the overall height the truss is manufactured as a piggyback truss to allow for transportation.

The term gambrel is of american origin the older european name being a curb.