Gambrel Roof Truss Spacing

Putting the trusses into place.

Gambrel roof truss spacing.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Or 24 o c you want to use. 30 gambrel attic truss with a 24 12 lower pitch and 7 12 upper pitch with 12 overhang. Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list.

Take the same truss count number times 4 for the number of 2 4 truss pieces you ll need to cut. 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. That truss count number less 1 times 6 count 1 6 total is the number of osb web pieces you ll need to cut. 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.

Ceiling and 18 2 width. Well let s face it it s a very attractive roof design but there are practical considerations as well. Take the number under the column of the center spacing 16 o c. Hip sets are used to construct hip roofs which are roofs that slope from all sides.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. This truss will be used in planset. 2 foot 76 4 foot 12. A gambrel room in attic truss also provides extra living space while giving your roof a barn like appearance.

Most are spaced between 18 26 inches apart. This series of diagrams shows just how the second floor lays out in each of our six different truss widths. Note that the gambrel style roof allows for a larger attic space with a 9 9. 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. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a. Due to the overall height the truss is manufactured as a piggyback truss to allow for transportation. Once you ve calculated the number of trusses you will need you should purchase the lumber.

Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. This system consists of a girder truss corner girder corner jacks and end jacks.