The following terms define Building and Machine Parts
cable: heavy-duty rope of wire strands, usually wound together.
cage: openwork structure or frame. Especially of bars or wires.
caisson: underwater housing for structure or foundation.
cantilever: extension of structural member beyond point of support.
cap: tight-fitting cover or top.
capstone: topmost stone in structure.
carriage: movable machine part designed to carry or convey something.
casing: trim or molding on doors or windows.
caster: small, swiveling wheel used to support or move furniture and heavy objects.
casting: part cast in mold.
ceiling joist: horizontal support piece for ceiling.
chain: rope or wire of connected metal links.
chamfer: beveled edge or channel on piece of wood.
channel: passageway, especially for gas or liquid; three-sided U-shaped element, usually metal.
chase: venial groove in masonry wall for pipes, duets, or conduits: frame that holds paper in printing press.
chassis: framework or support for working parts.
chimney: vertical flue that draws often gases and heat from furnace or fireplace.
chock: wedge of hard material that prevents movement or fills gap.
chord: outside horizontal member of truss.
chute: inclined or vertical downward passageway.
clack valve: valve having hinged flap that permits flow in one direction only.
clasp: fastener, especially dip.
cleat: wood brace.
clevis: U-shaped device with pin across opening.
clew: metal loop fastened to corner of hung camas.
cog: tooth or radial support on wheel or gear.
coil: wire turned in loops.
coil spring: wire spring coiled helically into conical or cylindrical shape.
collar: ring or flange, especially on pipe, to connect parts or prevent sideward motion.
collar beam: horizontal member placed between pair of opposing root ratters to stiffen roof.
column: vertical structural support.
common rafter: rafter that extends from ridgepole to top plate.
component: part or element of structure.
conduit: tube, pipe, or channel, especially for fluids or electric wiring.
connecting rod: reciprocating rod that connects two or more machine parts.
corner: point at which two or more surfaces meet, often a right angle.
corner board: exterior finish board at corner that abuts siding.
corner brace: diagonal structural support.
cornice: exterior trim at juncture of roof and wall, consisting of fascia, softie and molding.
cotter: split pin with spreadable ends.
counterflashing: metal surfacing especially for chimneys at roof line.
coupling: machine part that connects two rotating shafts at their ends to transmit torque between them.
cove molding: concave-faced molding especially between wall and ceiling.
cover: something placed over a part or structure, especially to conceal or protect it.
cowling: removable metal housing or cover for engine.
cradle: supportive framework on which something rests.
creel: basketlike cage or rack.
crest: projecting ridge, top, or summit.
crib: framework of strips or planks, open at top.
cripple: short wall stud above or below door or window.
crossbar: connective bar placed in horizontal position.
crossbeam: transverse beam in structure, such as joist.
cross bridging: bridging of crisscross wood pieces; herringbone bridging.
crosshead: sliding member of reciprocating engine for maintaining straight motion between piston rod and connecting rod.
crosspiece: any element lying across another or connecting two or more parts.
cross section: side or end section of object.
crosstie: beam or rod placed crosswise for support.
crown: top point, part resting at top.
crutch: usually forked support element on which another part rests.
culvert: drain or waterway under road or embankment.
curb: enclosing framework or border: element that restrains or checks curtain wall exterior wall that protects interior wall from weather but bears no structural load.