A rafter is a horizontal beam that supports the roof of a building.
The word "rafter" is often used when talking about houses or buildings. In construction, rafters are an essential part of a roof's structure. They're usually made of wood and are connected to beams called "purlins." Together, they help carry the weight of the roof and its covering materials, like shingles or tiles. When you hear someone say that their house needs new rafters because the old ones are rotten, it means the wooden supports need to be replaced.
One of a series of sloped beams that extend from the ridge or hip to the downslope perimeter or eave, designed to support the roof deck and its associated loads.
To make (timber, etc.) into rafters.
