Look up: rafters

1. Rafters
   Series of structural timbers rising from eaves to ridge to support pitched roof covering
   Found on http://www.fmb.org.uk/find-a-builder/hel
   
   
2. Rafters
   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
   Found on http://www.taylor-lane.co.uk/glossary.ph
   
   
3. Rafters
   The main structural timbers in a roof. are called principal rafters. The ones which fill gaps between are the common rafters.
   Found on http://www.encyclo.co.uk/local/20941