Gambrel Roof Truss Dimensions

See table 3 for the truss count.

Gambrel roof truss dimensions.

Take the number under the column of the center spacing 16 o c. Ceiling and 17 ft. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. The easiest way to get these angle measurements on the ends will be with the use of a speed square.

Save design time build time and money with trusses built in long production runs. 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 metric this gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon.

In stock at plant and ready for immediate pickup. Note that the gambrel style roof allows for a larger attic space with a 9 ft. 8 2 4 3 9 7 8 22 5 angle cuts on ends opposite direction roof deck. 8 1 2 plywood 4 x8 sheet cut to size corner trim side trim.

Now i am going to give you a design secret that i have discovered free of charge. That truss count number less 1 times 6 count 1 6 total is the number of osb web pieces you ll need to cut. Or 24 o c you want to use. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.

Take the same truss count number times 4 for the number of 2 4 truss pieces you ll need to cut. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. 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 barn style roof is simply a gable roof with a change in slope partway up the roof.

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. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a. 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.

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. Gambrel 2x4 truss measurements defined now we know all the necessary measurements to cut and make our first truss. Each truss piece will be 3 10 long on the top measurement and the angles cut will be 22 5 degrees off each end. 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.