The following terms define Building and Machine Partsvalley: V shaped depression at intersection of two sloping roofs. valley jacks: rafters that extend from ridgepole to valley rafter. valley rafter: diagonal rafter that extends from ridgepole to top plate to form intersection of two sloping roofs. valve: device that regulates flow of liquid or gas. vane: flattened, curved piece on revolving wheel. vapor barrier: section of material that resists passage of water vapor. vent: opening, especially in wall serving as outlet for air, smoke, or fumes. vent stack: top section of soil stack that extends out through roof. volute spring: conical coil spring extending in direction of axis of coil. |
