Roof Ridge Board Joint

The ridge board must be set as perfectly as possible so take your time and use careful measurements.

Roof ridge board joint.

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

The rafters bear most of the weight of the roof. 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. To extend the material to the correct length i splice ridge boards with a v shaped joint as shown in the drawing.

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. 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. The ridge board and rafters are the strength of the roof. Essentially the spine of a conventional stick framed roof the ridge board is sandwiched between the meeting ends of the roof rafters.

Its only job is to provide a connection point for the roof joists on each side of the roof. If roof sheathing is cut and removed to achieve an air slot continuity and diaphragm action are affected.