A combination of the two is a truncated truss, used in hip roof construction. The term is commonly used in both hip roof framing and jettying. Its roof variations might includes hip and gablet roof (combination of gable and hip roof). A hip roof on a rectangular plan has four faces. Shingle style houses often use a gambrel or hip roof. The building is covered by a double-pitched hip roof. The hip roof is covered with clay tile. A square hip roof is shaped like a pyramid. The head house is a single-story rectangular stone building with a black hip roof. It is covered by a truncated hip roof, and has four limestone chimneys. The hip roof contains dormers and is covered with terracotta tiling. The building has a shallow hip roof with exposed rafter ends. A hip roof is self-bracing, requiring less diagonal bracing than a gable roof.