At the peak of the roof where the rafters meet instead of the rafters meeting each other, there is a beam between them that they rest against. It runs the length of the roof peak.
To seal the ridge from weather. If a ridge vent is used it is just that, a vent for the roof.
A ridge board doesn't support rafters of the bridge whereas a ridge beam does.
The apex of roof is basically the highest point of the roof where ridge cap and ridge roll of a roof is located.
The highest part of the roof is the ridge.
The highest point of each roof area.
peak or ridge or ridge cap
The top of the house had a ridge on it.Our house has a ridge on the top of the roof.
Ridge
The highest point, the peak of each gable or hip.
Light/Sun Beam Laser Beam Roof Beam Jim Beam
For a typical gable roof you have a ridge board at the top with rafters running from the ridge to the top plates of the walls
roof, peak, ridge