Which roof element is the inclined beam that supports the roof and runs along the slope?

• A. Ridge
• B. Truss
• C. Rafter
• D. Purlin

Answer: (C)

Rafters are the sloped framing members that run from the top of the wall up to the roof peak, forming the roof slope and carrying the roof decking and covering. They are the inclined beams that support the roof along its slope. The ridge is the top line at the peak where rafters meet; a truss is a complete, often prefabricated triangular framework; a purlin is a horizontal member along the length of the roof that supports rafters or deck.