A style of roof framing that provides a wider expanse of space beneath the roof. The ridge beam is supported at either ends by posts. Instead of rafters, sloping transverse beams connect to the side of the ridge beam on one end and to a load-bearing post--usually along the external wall--on the other end of the transverse beam. Roof planks are then attached parallel to the ridge beam and perpendicular to the transverse beam.
For wider structures additional longitudinal beams, supported by posts, may be added between the ridge beam and the walls to provide additional support. With such structures, the transverse beams are often eliminated.
Instead, the roof planks are attached perpendicular to the longitudinal beams.
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