Roof Ridge Beam Construction

A timber frame roof has rafters and a ridge beam as with stick framing but the ridge is a large structural beam that the rafters sit on top of or sometimes fit into notches cut into the beam.

Roof ridge beam construction.

Leave ridge beam for shed construction page. The top ends of the rafters often meet at a ridge beam but may butt directly to another rafter to form a pair of rafters called a couple. 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. A classic example of the exposed ridge beam structure can be seen on our magnolia residence which is currently in construction.

2 except as provided in sentence 3 the ridge beam referred to in sentence 1 shall conform to the sizes and spans shown in table a 12 provided a the supported rafter or joist length does not exceed 4 9 m and b the roof does not support any concentrated loads. Because a ridge beam often carries a significant area of roof load they can exhibit structural distress due to a defect in wood impact on the roof or use of an undersize beam. A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to. Timber framing is a traditional method of framing that uses heavy timbers instead of standard board lumber.

Ridge beams are required by code if the roof slope is less than 3 in 12 irc section r802 3. I can t ever recall seeing a saltbox shed built with a ridge beam or even a gambrel roof shed for that matter. The ridge beam is typically a larger member like a 4 x 12 and carries the gravity load of the roof joists just as the bearing wall or header does at the envelope. Ridge beams and boards modern raising ceiling joists jlc technical steico construction roof rafter collar tie calculations structural ridge beamtimber steel framing manual single span ridge beamglulam ridge beam span table elcho.

Come to think of it the only style shed i can see that would be easy to use a ridge beam is the gable style shed. The ridge beam shown below at the living room of a 1950s modern style ranch house in gainesville has cracked at mid span and is slowly heading towards failure after the crack opened further after a recent repair. A simple rafter roof consists of rafters that the rafter foot rest on horizontal wall plates on top of each wall. 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 ridge board must be set as perfectly as possible so take your time and use careful measurements. 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. Construction of a rafter roof.