1) Beams 2) Timbers 1) High beams 2) Riders through rapids 3) Roof boards 4) Roof supports 5) Roof timbers 6) Roofing timbers 7) Some river travelers 8) Sometimes they ring 9) White-water enthusiasts 10) Whitewater figures 11) Whitewater sight 
The inclined, sloping framing members of a roof, and to which the roof covering is affixed.
The main structural timbers in a roof. are called principal rafters. The ones which fill gaps between are the common rafters.
The wooden structural support beams for a roof, sometimes visible on the exterior for certain building types and styles. 
The main structural timbers in a roof. are called principal rafters. The ones which fill gaps between are the common rafters.
The timbers carrying the coverings of a roof.
Series of structural timbers rising from eaves to ridge to support pitched roof covering
A sloping roof beam that generally runs from eave to ridge. Most roof elements are generally pre-fabricated trusses but rafters are used for infilling and for other areas where prefabrication is not practical. This term can also be applied to the principal rafter of a truss
The bits of frames which carry the roof loads.