Architectural and Engineering Glossary

C

Code Of Practice

A technical document setting forth standards of good construction for various materials and trades,but does not have the force of law.

Coded Fire Alarm System

A fire alarm system in which an alarm signal is sounded in a predetermined coded sequence,usually indicating the area in a building where the alarm has been initiated.

COEF

On drawings,abbr.for “coefficient.”

Coefficient Of Beam Utilization

The ratio of the luminous flux reaching a specified area from a floodlight or similar luminaire to the total luminous flux of the beam.

Coefficient Of Elasticity

Same as modulus of elasticity.

Coefficient Of Expansion

The change in dimension of a material per unit of dimension per degree change in temperature.

Coefficient Of Friction

The ratio of the force causing a body to slide along a plane (in the direction of sliding) to the normal force pressing the two surfaces together.

Coenaculum

In ancient Roman houses,the dining room or supper room,or any of the upper rooms in which food was eaten.

Coign

See quoin.

Color Chart

A chart showing a systematic array of colors or their representations.

Color Code

A system of colors adopted for identification of pipes,cables,wiring,or the like. 

Color Frame

A metal frame at the front of a luminaire,used to support transparent colored material,esp.in spotlights and floodlights.

Color Retention

The ability of a paint or varnish film to retain its original color appearance and not fade with age or exposure to sunlight.

Color Selection Log

See finish and color selection log.

Colored Aggregate

Sand,gravel,or other aggregate chosen for the coloration it can impart toconcrete in an exposed-aggregate finish.
 

Colored Finishes

In plastering,finish coats containing colored aggregates or color pigments;the color is intimately mixed throughout.

Colossal Column

A column that is more than one story in height.

Colossal Order,giant Order

An order more than one story in height.

Colour

See color.

Columbage

In French Vernacular architecture of Louisiana,timber framed construction with diagonal bracing of the framework;the space between the structural timbers was usually filled with bousillage or pierrotage.

Columella

Same as colonette.

Column Baseplate

A horizontal plate beneath the bottom of a column;transmits and distributes the column load to the supporting material below the plate.
 

Column Cage

An assembly of reinforcing bars and ties for use in constructing a reinforced concrete column.

Column Capital

A mushroom-like enlargement of reinforced concrete,at the upper end of a column,designed and built to act as an integral unit with the column and the floor slab above so as to increase the shearing resistance.

Column Casing

Any form of enclosure of a steel column which provides a prescribed fire rating,e.g.a boxed enclosure fabricated of a fire rated material,such as gypsum board;also see caged beam.

Column Clamp

A fastening device for a form for a concrete column,holding together the sides of the form.

Column Curve

The graphical relationship between the axial strength of a column and its slenderness ratio.

Column Footing

See footing.

Column Head

Same as column capital.

Column Side

In a form for a concrete column,one of the vertical panels.
 

Column Splice

A splice which unites two columns.

Column Strip

That portion of a flat slab,over  the columns,which consists of the  quarter panels on both sides of the column center line.

Columna Cochlis

In ancient Rome,a column with a spiral staircase around its center line.

Columna Rostrata

Same as rostral column. 

Columna Triumphalis

See triumphal column.

Columniation

Systems of grouping columns in classical architecture.Also see intercolumniation. 

Colymbethra

In a Greek church,the room or font for administering baptism.

COM

Abbr. for “customer’s own material.”

Com, Com.

In the lumber industry,abbr. for “common.”

Comb Board

A saddle board having notches along its upper edge.

Comb Ceiling

A ceiling that sags inwardly like a tent.Also called a camp ceiling or tent ceiling.

Comb Cut

Same as plumb cut.

Comb-grained

See edge-grained,quartersawn.

COMB.

On drawings,abbr. for “combination.”

Combed

Same as dragged.

Combed Joint

A finger joint.

Combed-finish Tile

Tile whose face surfaces are altered by more or less parallel scratches in manufacture to give increased bond for mortar,plaster,or stucco.

Combination Fixture

A fixture which combines one or more kitchen sinks and laundry trays in a single unit.

Combination Frame

In light wood-frame buildings,a combination of a full frame and a balloon frame.

Combination Sheet

In roofing,a fiberglass felt integrally attached to kraft paper.