This is an example of a double roof with principal rafters and common rafters.
Roof truss ridge beam.
Known as the leading manufacturer of metal plated wood roof floor trusses in the east rigidply trusses are manufactured for residential commercial post frame and many other applications.
It is often used to prevent separation of the rafters during high winds but can also be used simply to frame the ceiling.
Our roots are in the manufacturing of glu laminated wood timbers offering glu laminated posts beams arches timber trusses bridges and pavilions.
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.
So called because it is the horizontal beam that supports the ends of the rafters at the ridge.
Ridge beams are required by code if the roof slope is less than 3 in 12 irc section r802 3.
Yes either a ridge board or a ridge beam is necessary and required by the building code where roof rafters meet at the the center of their span.
The difference between them is that a ridge beam is a structural member that bears half of the live and dead loads of the rafters on either side of it but a ridge board is not structural.
A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to.
A horizontal beam that connects two rafters near the ridge of a roof.
A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof.