How To Frame A Gambrel Roof Truss

Start with the top corners of the roof first.

How to frame a gambrel roof truss.

Installing the roofing sheets. Use the protractor to measure those angles at the peak the walls and the point where the two lines intersect on the top side of the roof. A gambrel style shed roof offers the most storage space in the attic when compared to a gable or saltbox style shed roof. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a.

Calculate gambrel angles with graph paper and a protractor. Take the same truss count number times 4 for the number of 2 4 truss pieces you ll need to cut. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Or 24 o c you want to use.

As you can notice in the image you need to use regular trusses and to install 7 blockings as to get a 10 overhang. That truss count number less 1 times 6 count 1 6 total is the number of osb web pieces you ll need to cut. 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.

Nail osb or plywood onto the rafters to enclose the roof. Place the osb or plywood on the top portion of the rafters and make sure that the edges run flush. Draw a semi circle on the graph paper mark a center peak at the top and draw two lines on each side in the shape desired for the gambrel roof. Attach the components to the gambrel ends and secure them to the framing with 3 1 2 galvanized screws after drilling pilot holes.

Nail along the edges of the osb or plywood driving the nails into the rafters every 8 inches 20 cm with 8d common nails. Take the number under the column of the center spacing 16 o c. The project architect briefly discusses the. The guidelines i am about to explain for you outline the steps i use when i am designing my gambrel shed plans barn shed plans and small barn plans.

A rhode island builder shows how he built trusses for this classic roof shape right on the job site simplifying a procedure that can be slow and cumbersome. Gambrel roof trusses are a popular style used often in barn or garage construction. By joe stanton issue 141. Framing a gambrel roof site built trusses are a speedy way to frame this traditional barn shaped roof.

The double bend in the trusses makes for a more spacious area that affords more usable square footage than the average roof truss.