Gambrel Roof Truss Dimensions

Each truss piece will be 3 10 long on the top measurement and the angles cut will be 22 5 degrees off each end.

Gambrel roof truss dimensions. Note that the gambrel style roof allows for a larger attic space with a 9 ft. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Take the number under the column of the center spacing 16 o c.

Ceiling and 17 ft. See table 3 for the truss count. This results in that squatty appearance. Due to the overall height the truss is manufactured as a piggyback truss to allow for transportation.

That truss count number less 1 times 6 count 1 6 total is the number of osb web pieces you ll need to cut. Gambrel roof framing geometry calculator metric this gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon. 8 2 4 3 9 7 8 22 5 angle cuts on ends opposite direction roof deck. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth.

8 1 2 plywood 4 x8 sheet cut to size corner trim side trim. 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. 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.

The easiest way to get these angle measurements on the ends will be with the use of a speed square. Or 24 o c you want to use. 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.

So you have a really steep bottom pitch and a really flat 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. Take the same truss count number times 4 for the number of 2 4 truss pieces you ll need to cut. Save design time build time and money with trusses built in long production runs.

Save design time by searching hundreds of thousands of predesigned trusses by entering your truss requirements. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof. Gambrel 2x4 truss measurements defined now we know all the necessary measurements to cut and make our first truss. Now i am going to give you a design secret that i have discovered free of charge.