Gambrel Roof Truss Dimensions

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

Gambrel roof truss dimensions.

8 2 4 3 9 7 8 22 5 angle cuts on ends opposite direction roof deck. Ceiling and 17 ft. 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. Note that the gambrel style roof allows for a larger attic space with a 9 ft.

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. Or 24 o c you want to use. The easiest way to get these angle measurements on the ends will be with the use of a speed square. Gambrel roof framing geometry calculator metric this gambrel roof confines to 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. Take the same truss count number times 4 for the number of 2 4 truss pieces you ll need to cut. See table 3 for the truss count. So you have a really steep bottom pitch and a really flat top pitch.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. 12 1 4 8 cut to size the 10 12 gambrel shed floor is built with pressure treated 2 6 s and pressure treated 4 4 s. That truss count number less 1 times 6 count 1 6 total is the number of osb web pieces you ll need to cut. Take the number under the column of the center spacing 16 o c.

In stock at plant and ready for immediate pickup. Now i am going to give you a design secret that i have discovered free of charge. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. 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. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof. This results in that squatty appearance. Save design time build time and money with trusses built in long production runs.

Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Due to the overall height the truss is manufactured as a piggyback truss to allow for transportation. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Each truss piece will be 3 10 long on the top measurement and the angles cut will be 22 5 degrees off each end.