Gambrel Roof Plywood Gussets

With your first truss measuring out ok its time to cut and attach gusset plates.

Gambrel roof plywood gussets.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Used a gambrel roof using plywood gussets used 3 4 so the two sides match the rafter thickness and did not cut them full triangles. With that said when designing gambrel roof it s very important to consider wind load and other load factors because of the odd angled shape and not having ceiling collar ties you have increased chance for rafter movement under wl ll and dl so the gussets must be sized correctly if not your roof. For the gambrel truss we will need 6 total gusset plates made out of 1 2 material like osb or plywood.

Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Gambrel roof a gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof. Hardware is required at only three points as opposed to nine different joints in the roof assembly of a traditionally framed gambrel making the system considerably easier to build. Nailed plywood gusset roof trusses author.

You might want to read through this thread as well gambrel roof. 10 23 2019 9 32 56 am. The gussets top in the gambrel system above designed by the author create a three hinged arch out of each frame which simplifies the load analysis significantly. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth.

Nail gusset plates to the truss at all 3 connection spots with 8d common nails using 10 per connection 5 per each truss end. If plywood is used the rule of thumb is 3 4 to match the thickness of the sandwiched rafter. Nail on gusset plates.