Gambrel Roof Gusset Size

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

Gambrel roof gusset size.

Analyzing the gusset system. With your first truss measuring out ok its time to cut and attach gusset plates. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon.

The gambrel spans 10 feet. The trusses have two roof beams present on each side and a gusset plate is used to support the roof beams. The gusset system relies on a pair of 3 4 inch fir plywood gussets at each joint with the rafters sandwiched in the center. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth.

Taken together the plywood pieces have the same thickness as the rafters themselves. Using this method it will take under an hour to cut all the 1x4 strips and gusset plates. When the construction and assembling of the trusses are completed they re placed on top of the building and then fortified by being secured to the floor. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area.

The size of the roof dictates the number of trusses required for completion. For the gambrel truss we will need 6 total gusset plates made out of 1 2 material like osb or plywood. Enter the size of the upper fascia board or select a lumber size from the dropdown list. Nail gusset plates to the truss at all 3 connection spots with 8d common nails using 10 per connection 5 per each truss end.