Gambrel Roof Specs

Due to the overall height the truss is manufactured as a piggyback truss to allow for transportation.

Gambrel roof specs.

The name comes from the medieval latin word gamba meaning horse s hock or leg. Anything less than this will ultimately result in a roof that leaks if you plan on putting shingles on it. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof.

The term gambrel is of american origin the older european name being a curb. 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. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. This series of diagrams shows just how the second floor lays out in each of our six different truss widths.

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. 28 gambrel attic truss with a 24 12 lower pitch and 7 12 upper pitch with 12 overhang. This design provides the advantages of a sloped roof while maximizing headroom inside the building s upper level and shortening what would otherwise be a tall roof.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. This means that for every 12 horizontal run you must have at least 3 of rise. 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.

20 x 24 gambrel garage. With overhang selected drag slider to increment decrement birdsmouth seat width to suit. Stairs to be constructed with the following materials. Stair detail scale 1 4 1 1.

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. 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. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. To learn more about what we do please view our specifications and our faq pages.

Ceiling and 17 ft. The barn roof style pictures shown with customer completed railing exterior steps and staining. The upper slope is positioned at a shallow angle while the lower slope is steep. With no interior walls or support posts our engineered gambrel trussdesign optimizes useable upstairs interior space.

This truss will be used in planset.