Ridge Board Roof Construction

The rafters terminate against the ridge board unless the framing is designed to bear rafter against rafter with no ridge board.

Ridge board roof construction.

Create a saddle at the top with the braces the height of the building walls plus rise less the width of the ridge board. Position a ridge board down in the saddles of the supports. 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. Cut to the ridge board to the length of the shed dimension b and mark it 24 inch on center.

The engineering principles of the ridge board are a bit more complicated. The ridge board must be set as perfectly as possible so take your time and use careful measurements. This type of framing is a specially designed rafter layout and requires precise and experienced erection. Brace these supports in the centerline of the building.

Its only job is to provide a connection point for the roof joists on each side of the roof. Definition of ridge board in construction the top board at the peak of a roof. The ridge board and rafters are the strength 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.