Gambrel Roof Truss Spacing

Depending on the complexity of your free computational tool it may require you to enter details about rafter spacing usually 16 on center bridge type height and board size.

Gambrel roof truss spacing.

To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a. This system consists of a girder truss corner girder corner jacks and end jacks. 2 foot 76 4 foot 12. Well let s face it it s a very attractive roof design but there are practical considerations as well.

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. Putting the trusses into place. Ceiling and 18 2 width.

Take the same truss count number times 4 for the number of 2 4 truss pieces you ll need to cut. This truss will be used in planset. The trusses should be a little longer than the exact width to allow for overhang and you will need sufficient trusses to mount across the length. 30 gambrel attic truss with a 24 12 lower pitch and 7 12 upper pitch with 12 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. Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list. Once you ve calculated the number of trusses you will need you should purchase the lumber. A gambrel room in attic truss also provides extra living space while giving your roof a barn like appearance.

Due to the overall height the truss is manufactured as a piggyback truss to allow for transportation. With no interior walls or support posts our engineered gambrel truss design optimizes useable upstairs interior space. Most are spaced between 18 26 inches apart. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth.

Hip sets are used to construct hip roofs which are roofs that slope from all sides. This series of diagrams shows just how the second floor lays out in each of our six different truss widths. Or 24 o c you want to use. Note that the gambrel style roof allows for a larger attic space with a 9 9.

Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.