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Glossary of Terms

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Glossary of Terms

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Words beginning with C

- C -

CAMBIUM: A one-cell-thick layer of tissue between xylem (woody tissue) and phloem (sieve tubes, fibers, food-conducting tissue) in most vascular (sap carrying) plants that is responsible for secondary growth.

CANTILEVER: A structural member which has a free end projecting beyond its supporting wall or column; length of span overhanging the support. Any structural part of a building that projects beyond its support and overhang.

CARPORT: A roof that covers a driveway or other parking area, it does not have a door in the manner of a garage. A garage for one or two cars consisting of a flat roof supported on poles

CASING NAIL: Casing nails are used where the nail heads must be hidden. A casing nail has a small head and a smaller diameter than a common nail but is thicker than a finishing nail.

CAULK: To make watertight or airtight by filling or sealing. To apply caulking (example: he caulked all around the door frame)

CAULKING: A usually impermeable substance used for caulking. Also called caulking compound. A soft pliable material used to seal cracks (such as around windows and door frames) and is normally applied from a tube in a caulking gun.

CD: Ply wood. Defects one side. Filled and sanded one side.

CEMENT: A powdery type substance made from a mixture of earths materials such as limestone and shale, which is sintered (cause to become solid mass by heating without melting), ground, and mixed with small amounts of calcium sulphate and calcium carbonate. Cement is activated by water and when mixed with gravel and sand, forms concrete.

CEILING JOIST: A horizontal framing member to which ceiling linings are fixed.

CENTERS: Crs; O.C; Term used for spacing; The measurement of spacing for studs, rafters, and joists in a building from the center of one member to the center of the next.

CF: Chemical free

CGL: Common Grade Lumber. Lumber with obvious defects

CHAMFER: A beveled cut along the edge of a piece of wood

CLADDING UNDERLAY: A building paper that envelopes the exterior walls or roof frame prior to the cladding being fixed. Reduces air movement and helps avoid the risk of water ingress.

CLADDING: The exterior surface of a building.

CLEAT: A short horizontal member that ties opposing rafters together immediately below the ridge board.

CLEARS: Timber without Knots.

CLERESTORY: A window in the upper part of a lofty room, usually out of reach from the floor. An upper portion of a wall containing windows for supplying natural light to a building.

CLOUT (NAIL): A short nail with a large flat head used for securing roofing felt, plasterboard, sheet metal to wood etc.

COMMON NAIL: Common nails have heads that are clearly visible after the nails have been driven home. They are used for general construction such as wall framing or other such situations where appearance is not important

CONCRETE: A mixture of sand, gravel, water and cement which hardens to a stone like condition when dry.

C.O.S.: Call Out Size (C.O.S.). The nominal size of a window or door. The "name" of the size. The call out size is the outside window or door frame measurement. Example: A window that is 4ft wide and 4ft high (overall) would have a call out size of 4040.

CRIPPLE STUD: Short studs placed between the header / lintel and a top plate or between a sill and bottom plate.


CTL: Cut to length.

CURING: The hardening of concrete. The process of becoming hard or solid by cooling or drying or crystallization. In concrete application, the process in which mortar and concrete harden. The length of time is dependent upon the type of cement, mix proportion, required strength, size and shape of the concrete section, weather and future exposure conditions. The period may be 3 weeks or longer for lean concrete mixtures used in structures such as dams or it may be only a few days for richer mixes. Favorable curing temperatures range from 50 to 70 degrees F. Design strength is achieved in 28 days