A term rafter is given to the main members of a roof frame that run from the top of the walls to the apex of the roof. These are the principal members in roof construction. Names associated include common, crown end, cripple, creeper and centring rafters.
(1) The framing member that directly supports the roof sheathing. A rafter usually follows the angle of the roof, and may be a part of a roof truss. (2) The supporting framing member immediately beneath the deck, sloping from the ridge to the wall plate.
timber set at an angle, and that support laths under the roof covering principal rafter inclined timbers that coincide with the main posts of the framework and support the purlins. common rafters inclined timbers, lighter than principal rafters, spaced evenly between the latter along the length of the roof.
A sloping roof member that supports the roof covering which extends from the ridge or the hip of the roof to the eaves. A common rafter is one which runs square with the plate and extends to the ridge. A hip rafter extends from the outside angle of the plate towards the apex of the roof. They are 2" deeper or wider than common rafters. A valley rafter extends from an inside angle of the plates toward the ridge of the house.
One of a series of structural members that form the legs of the triangle created in roof framing; joined at the peak of the triangle by the ridgeboard. Rafters support roof sheathing and finish materials.