How To Set A Roof Ridge

This ridge is created by what is called a hip rafter.

How to set a roof ridge.

If you know the slope x in 12 you want to use for your roof framing design you can use it along with the run r to determine the height of the ridge beam for example if the slope is 4 in 12 and the run is 12 feet the ridge beam height m will be 4 feet. 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. Other elements like gable studs and cross ties supply additional bracing. Rafters and a ridge board are the key components of a roof framing system.

The rafters support the sides or slope of the roof. The ridge would be nailed to the rake plates at that height. To set the height of a supporting ledger the author set a scrap of the ridge stock into the slot on the gable. 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.

There are some simple techniques to follow when attempting this project. Two simple cuts create three pieces that can be used to finish the shingle project. In part 3 of our roof framing series we cover how to select a ridge board how to layout a ridge board how to mark it so you know where to fasten the raft. The ridge cap the course of shingles on the very ridge of the roof can be made from available 3 tab shingles.

To set the height of this temporary ledger i inserted a short cut off piece of the ridge with the ventilation packer into the slot at the top of each gable before nailing the ledger in place. The ridge board forms the peak and ties the rafters together side to side and end to end. Instead it has an additional roof plane at each end of the central horizontal ridge. The finished ridge beam height z above the top of the wall will be m plus the y height.

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. It works just like a ridge board but is set at an angle.