Roof Ridge Board Joint

A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to.

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. If roof sheathing is cut and removed to achieve an air slot continuity and diaphragm action are affected. The ridge board and rafters are the strength of the roof. Ridge board the engineering principles of the ridge board are a bit more complicated.

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. 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. The ridge board holds them in place. 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.

Part of a roof s frame a ridge board runs horizontally along the peak of a sloped roof. Its only job is to provide a connection point for the roof joists on each side of the roof. The ridge board must be set as perfectly as possible so take your time and use careful measurements. To extend the material to the correct length i splice ridge boards with a v shaped joint as shown in the drawing.

This video shows how to make roof rafters with a rafter square and or a speed squ. To begin the cuts overlap the ridge material with the crowns pointing in the same direction. 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. Note holes should not remove more than half of the sheathing section note.

Essentially the spine of a conventional stick framed roof the ridge board is sandwiched between the meeting ends of the roof rafters. The rafters bear most of the weight of the roof.