Roofing / Sloping roof member
Rafter
/ˈræf.tər/noun
From Old English ræfter, a beam.
Definition
One of a series of sloping members running from the ridge or hip to the wall plate, supporting the roof deck and covering.
Fig. 47 — Rafter: schematic studyNOT TO SCALE
Illustrative study — Rafter · AI-generatedSAMPLE IMAGE
Photo study — Rafter · AI-generated00:06
Structural & construction notes
Paired rafters push outward at their feet; ceiling joists, collar ties, or a structural ridge resist this spread. Rafters act in bending under roof loads and may be supported midspan by purlins.
An educational reference. Project-specific design requires professional guidance.