Gambrel Roof Plywood Gussets

10 23 2019 9 32 56 am.

Gambrel roof plywood gussets.

Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Nail gusset plates to the truss at all 3 connection spots with 8d common nails using 10 per connection 5 per each truss end. Nailed plywood gusset roof trusses author.

Gambrel roof a gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Plywood gussets could then be used to reinforce the joint if necessary. Keep in mind that i used a ridge beam not a ridge board which substantially reduces the load and outward thrust issue.

For the gambrel truss we will need 6 total gusset plates made out of 1 2 material like osb or plywood. 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. Nail on gusset plates. 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.

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. If plywood is used the rule of thumb is 3 4 to match the thickness of the sandwiched rafter. With your first truss measuring out ok its time to cut and attach gusset plates.