Roof Framing Ridge Board

Ridge boards can only be used in roofs with slopes from 3 in 12 up to 12 in 12.

Roof framing ridge board.

Ridge boards shall be at least 1 inch nominal thickness and not less in depth than the cut end of the rafter irc section r802 3. Definition of structural ridge or ridge beam used in roof framing 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 ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to. Its only job is to provide a connection point for the roof joists on each side of the roof.

The ridge board and rafters are the strength of the roof. You can determine the length of a common rafter using either of two easy methods. Wondering how to build the structure of your roof. The easiest method of erecting the rafters is to make temporary braces of 2 by materials.

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. This video covers one of the most exciting parts of roof framing installing rafters. These should be the height of the building walls plus the rise. Framing with a ridge board a ridge board is used in a completely different method of construction.

We will go over raft. To avoid these problems in a structure with a cathedral ceiling it helps to understand how a typical roof frame works. The ridge is the peak where two sloped roof sections meet. Essentially the spine of a conventional stick framed roof the ridge board is sandwiched between the meeting ends of the roof rafters.

Contributing editor scott mcbride replies. Use only enough supports for the first length of ridge board. 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. Once the ridge beam has been positioned in place and supported by roof framing members you can determine the placement of a rafter by measuring down from the top of the beam y height and making a mark on the beam.

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 conventional framing system can be used for roofs with a 3 12 slope or greater and works like a triangle requiring all three sides and points to be provided as shown in the illustration. How can i remove the ceiling joists without allowing the ridge to sag or the walls to bow out.