Gambrel Roof Specs

There really isn t a standard however i know exactly what you mean about the squatty appearance of your modern gambrel trusses.

Gambrel roof specs.

20 x 24 gambrel garage. Due to the overall height the truss is manufactured as a piggyback truss to allow for transportation. 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. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. A gambrel or gambrel roof is a usually symmetrical two sided roof with two slopes on each side. Note that the gambrel style roof allows for a larger attic space with a 9 ft.

Stair detail scale 1 4 1 1. So you have a really steep bottom pitch and a really flat top pitch. 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.

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. The barn roof style pictures shown with customer completed railing exterior steps and staining. To learn more about what we do please view our specifications and our faq pages. 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.

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. 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. 28 gambrel attic truss with a 24 12 lower pitch and 7 12 upper pitch with 12 overhang.

A gambrel roof well let s face it it s a very attractive roof design but there are practical considerations as well. Stairs to be constructed with the following materials. This means that for every 12 horizontal run you must have at least 3 of rise. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area.

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. 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. Ceiling and 17 ft. The upper slope is positioned at a shallow angle while the lower slope is steep.

With overhang selected drag slider to increment decrement birdsmouth seat width to suit.