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.

How to set a roof ridge. The ridge board forms the peak and ties the rafters together side to side and end to end. 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. The finished ridge beam height z above the top of the wall will be m plus the y height. The ridge would be nailed to the rake plates at that height.

Rafters and a ridge board are the key components of a roof framing system. 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. Two simple cuts create three pieces that can be used to finish the shingle project. There are some simple techniques to follow when attempting this project.

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. It works just like a ridge board but is set at an angle. To set the height of a supporting ledger the author set a scrap of the ridge stock into the slot on the gable.

Determining the ridge beam 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. The rafters support the sides or slope of the roof. The ridge board must be set as perfectly as possible so take your time and use careful measurements.

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