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A ground (such as the steel framework of a building,a concrete-encased electrode,or a ground ring) that meets the requirements of the National Electrical Code or other applicable code.

The individual agency,board,department,or official established and authorized by a political subdivision (e.g.,state,province,county,city,or parish) which is created by law to administer and enforce specified requirements.

On drawings,abbr.for “approximate.”

1.Any built-in,nonstructural portion of a building,such as doors,windows,ventilators,electrical equipment,partitions,etc.2.An incidental property right,as a right- of-way.appurtenance 1.Any built-in,nonstructural portion of a building,such as doors,windows,ventilators, electrical equipment,partitions,etc.2.An incidental property right,as a right of way.

A structure attached to the exterior of a building or erected on the roof, usually designed to support service equipment or to support a billboard or the like.

1.The flashing that covers the joint between a vertical surface and a sloping roof,as at the lower edge of a chimney.2.The flashing that diverts water from a vertical surface into a gutter.

A hydraulic or mechanical lift which extends the fixed apron of a stage in front of a proscenium opening.

The piece of boarding which covers the rough apron piece of a staircase.

A lock rail having a raised ornamental molding.

A deep-sided sink whose front and sides are extended downward from the upper edge,forming an apron around the sink.

In a proscenium theater,an extension of the fixed apron (in front of a proscenium opening) by means of a platform or by an apron lift.

In an exterior wall,a panel which extends downward from a windowsill to the top of a window below.

A semicircular (or nearly semicircular) or semipolygonal space,usually in a church,terminating an axis and intended to house an altar.

An aisle or ambulatory extending around an apse or chevet.

A chapel opening from an apse;such a radial chapel is a conspicuous feature of French Gothic architecture.

Pertaining to an apse or similar to one.

A small apsidal chapel,esp.one projecting from an apse.There are often several chapels projecting from the apse.

The semicircular termination of any rectangular chamber;an apse.

Descriptive of a classical temple or similar building that has no columns along the sides but may have a portico at one or both ends.
 

On drawings,abbr.for “architectural projected window.”

A channel for supplying water;often underground,but treated architecturally on high arches when crossing valleys or low ground.

A water-bearing formation of gravel,permeable rock,or sand that is capable of providing water,in usable quantities,to springs or wells.

A tympanum decorated with carvings.

1.On drawings,abbr.for “as required.”2.On drawings,abbr.for “as rolled.”
 

Any Classical structure elevated above the general ground level which is used to make offerings to the gods.

1.Intricate overall pattern of geometric forms or stylized plants used in Muslim countries.2.Overall decorative pattern of acanthus scrolls,swags,candelabrum shafts,animal or human forms,on panels or pilasters,in Roman and Renaissance architecture.3.A species of ornament of infinite variety used for enriching flat surfaces or moldings,either painted,inlaid,or carved in low relief.

A horseshoe arch.

A process of cutting or removing metal by melting it with the heat produced between an electrode and the metal being cut.

A high intensity light source produced by an arc,usually,between two metal electrodes or between two carbon rods;also see carbon arc spotlight.

See carbon arc spotlight.

A weld in which the heat of fusion is supplied by an electric arc.

The joining of metal parts by fusion,in which the necessary heat is produced by means of an electric arc,sometimes accompanied by the use of a filler metal and/or the application of pressure.

Same as flying buttress.

In ancient Roman architecture,the gutters of the cavaedium.

Any narrow elongated surface forming part of,or connected with,an arch.

A curved wrought iron or steel bar used to support the weight of the masonry above a fireplace or window opening.

See barrel vault.

Same as arched beam.

A curved brace,usually used in pairs to support a roof frame and give the effect of an arch.

Same as flying buttress.

Same as flying buttress.

Formwork to support the voussoirs of an arch during construction.

A corner bead that is cut on the job;used to form and reinforce the curved portion of an arch opening.

1.In Roman architecture,arches enframed by engaged columns and entablatures.2.In medieval architecture,successive vertical planes of arches and colonettes set one within another.

1.In Romanesque architecture,a transverse rib crossing the nave or aisle at right angles to its length.2.A principal load-bearing member of a ribbed arch.

In an arched structure,the curved member that sustains the principal load.

Same as voussoir.

A seldom used term for a decorative border around an arch;same as archivolt. 

 A truss having an arched upper chord (concave downward) and a straight bottom chord;there are vertical hangers between the two chords. 

On drawings,abbr. for architect,architecture,or architectural.