Roof Framing Ridge Board

Its only job is to provide a connection point for the roof joists on each side of the roof.

Roof framing ridge board.

Ridge boards can only be used in roofs with slopes from 3 in 12 up to 12 in 12. These should be the height of the building walls plus the rise. 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. Fasten the rafters to the ridge board and the bird s mouth to the top wall plate and add collar ties.

Wondering how to build the structure of your roof. 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. The ridge board and rafters are the strength of the roof. 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.

Use only enough supports for the first length of ridge board. To avoid these problems in a structure with a cathedral ceiling it helps to understand how a typical roof frame works. The easiest method of erecting the rafters is to make temporary braces of 2 by materials. You can determine the length of a common rafter using either of two easy methods.

The ridge is the peak where two sloped roof sections meet. The ridge board must be set as perfectly as possible so take your time and use careful measurements. The engineering principles of the ridge board are a bit more complicated. Framing with a ridge board a ridge board is used in a completely different method of construction.

A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to. Essentially the spine of a conventional stick framed roof the ridge board is sandwiched between the meeting ends of the roof rafters. This video covers one of the most exciting parts of roof framing installing rafters. 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.

We will go over raft. 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. How can i remove the ceiling joists without allowing the ridge to sag or the walls to bow out. Contributing editor scott mcbride replies.