A rafter is a sloped structural framing member that serves as the primary skeleton of a pitched roof, extending from the ridge or peak down to the eaves or wall plate. Functioning as an inclined beam, rafters are typically arranged in a series at regular intervals to support the roof deck, sheathing, and exterior coverings like shingles or tiles. Their primary role is to transfer the weight of the roof—including environmental loads from snow, wind, and rain—down to the building's load-bearing walls and foundation. Historically associated with "stick framing" and traditionally crafted from wood, modern rafters can also be made of steel or engineered lumber to accommodate longer spans and complex roof geometries such as gable, hip, and gambrel designs. Beyond their structural necessity, rafters define a building's roofline and pitch, and when left exposed, they serve as a distinct aesthetic feature that adds rhythm and architectural character to both interior and exterior spaces.