Roof Ridge Board Design

Floor beam span tables of residential structural design we will now look at roof rafter and beam design.

Roof ridge board design.

This type of framing is a specially designed rafter layout and requires precise and experienced erection. Collar ties of a similar dimension and look as the roof joists. Definition of ridge board in construction the top board at the peak of a roof. Choose a ridge board that is one size larger than your common rafters.

For 2 x 4 rafters use a 2 x 6 ridge board. Is 22 ridge board too long of a span worried about roof sag. A classic example is the los altos hills remodel below by klopf architecture which uses a double 2x tension tie to sandwich each roof joist. The rafters terminate against the ridge board unless the framing is designed to bear rafter against rafter with no ridge board.

The loads on the ridge beam are carried by vertical posts at the beam ends down through the building structural walls to the building foundation. A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to. Here we have a wood framed gable roof. A structural ridge beam is a horizontal beam placed at the peak or ridge of a roof and is designed to carry much of the live and dead loads or weight of the roof structure by itself.

Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam. The ridge board s length will be the outside measurement of the building plus the length of the overhang at both ends. For 2 x 6 rafters use a 2 x 8 ridge board and so on. Continuing on from part 3.

Rafter to ridge beam connection framing roof ceiling construction structural ridge beam absolute deflection in a ridge beam structural ridge beam tricks of the trade. This video shows how to make roof rafters with a rafter square and or a speed squ. Traditional examples of the ridge board system utilize wood tension ties a k a.