Gambrel Attic Truss Dimensions

A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof.

Gambrel attic truss dimensions. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Step 2 decide how tall the roof should be. Gambrel trusses can also have a nice size room built in just like an attic truss. Using the size of the building as a guide determine how many trusses will be needed for the roof.

This truss will be used in planset. If the building is 40 in length and 26 in width and the truss spacing was 24 o c then you would take 40 divided by 2 equals 20. 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.

2 o c trusses can also be set 4 o c for gambrel style appeal but eliminating attic storage and flooring. 28 gambrel attic truss with a 24 12 lower pitch and 7 12 upper pitch with 12 overhang. For the building as described you would need order 19 26 common trusses and 2 26 end frames. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area.

Note that the gambrel style roof allows for a larger attic space with a 9 ft. Gambrel trusses are great for the old barn style image. Gable room in attic trusses provide an economical way to add extra living space to your home or garage. A gambrel room in attic truss also provides extra living space while giving your roof a barn like appearance.

Always remember to add 1 20 1 21. Use of manufactured roof trusses can dramatically cut labor costs when framing a gable roof compared to building rafters. The trusses can be any height but the typical angle of the upper section of a gambrel truss is 30 degrees and the typical angle of the lower section generally has a bend of 60 degrees. Check out building 1 building 2 building 3.

There should be one truss at each end and the rest should be placed every 16 inches on center. The room size will vary depending on the width and slope of the truss. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a.