Ridge Beam
Where ceiling joist or rafter ties do not provide continuous ties across the structure (like that of a cathedral ceiling), the ridge should be supported by a wall or ridge beam and supported on each end by a wall or column. The ridge beam must be capable of supporting the full load of the rafters. The ridge beam must be stiff enough to minimize the deflection from the rafter loads so that rafter thrust does not displace the walls (2021 IRC R802.3).
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