Roof Ridge Board Joint

Ridge boards shall be at least 1 inch nominal thickness and not less in depth than the cut end of the rafter irc section r802 3.

Roof ridge board joint.

The ridge board holds them in place. A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to. The ridge board runs the length of the building and provides support for the tops of the rafters helping the whole roof structure work together as a system. If roof sheathing is cut and removed to achieve an air slot continuity and diaphragm action are affected.

The rafters bear most of the weight of the roof. Part of a roof s frame a ridge board runs horizontally along the peak of a sloped roof. The ridge board and rafters are the strength of the roof. To ridge board roof sheathing ridge board ridge board joist or truss joist or truss roof sheathing vent holes on each side of ridge board.

Ridge board the engineering principles of the ridge board are a bit more complicated. Ridge boards can only be used in roofs with slopes from 3 in 12 up to 12 in 12. This video shows how to make roof rafters with a rafter square and or a speed squ. A ridge board or beam runs through the tops of rafters or trusses from end to end along a gable roof tying those framing members together.

My crew and i call this technique penciling the ridges after the big pencil shaped piece of wood that results when the cuts are made. Essentially the spine of a conventional stick framed roof the ridge board is sandwiched between the meeting ends of the roof rafters. Note holes should not remove more than half of the sheathing section note. To extend the material to the correct length i splice ridge boards with a v shaped joint as shown in the drawing.

Its only job is to provide a connection point for the roof joists on each side of the roof. Because the ridge board is a smaller member typically only an inch thick sometimes even less it is not a structural member and doesn t carry the gravity load.