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Structural

Rafter

In Plain English

A sloped framing member that forms the framework of a pitched roof and carries the roof's weight to the walls below.

Definition

A sloped structural member that forms the framework of a pitched roof and supports the roof covering. Rafters extend from the ridge board or ridge beam at the peak down to the wall plate or beam at the eaves. They carry roof loads—including dead load, live load, snow load, and wind load—to the supporting walls or beams.

Example

2×10 rafters at 16 inches on center span 16 feet from the ridge board to the exterior wall top plate.

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