Architectural and Engineering Glossary

B

Basement Wall

A foundation wall which encloses a usable area under a building.
 

Basement Window

A window in the basement of a residence.

Baseplate

1.A metal plate used to distribute a nonuniform load.2.A metal plate on which a column rests.3.A metal plate used as a foundation for heavy machinery;a bed plate.

Basic Building Code

A model code that has been widely used in the US,particularly in the northeastern and midwestern states.
 

Basic Creep

In concrete construction,creep occurring without the migration of moisture to (or from) the concrete.

Basic Insulation Level (BIL)

The insulation capability of an item of electrical equipment (e.g.a transformer) to withstand specified voltage surges.

Basic Services

The services performed by an architect during the following five phases of a project:schematic design;design development;construction documents;bidding or negotiation;and contract administration.

Basic Wind Speed

The wind speed that is used in determining wind load on a structure before other factors (such as height above the ground and the effects of shielding) are taken into account.

Basil

Same as bezel.

Basilica

1.A Roman hall of justice,typically with a high central space lit by a clerestory and lower aisles all around it,and with apses or exedrae for the seats of the judges.2.The form of the early Christian church,a central high nave with clerestory,lower aisles along the sides only,with a semicircular apse at the end.Often preceded by a vestibule (narthex) and atrium.In larger basilicas,there are often transepts,and sometimes five aisles.
 

Basin

1.A somewhat shallow vessel for holding water (or the like).2.A shallow tank or natural or artificial depression containing water.

Basin Fittings

The trim,3 on a water basin that usually includes one or more faucets,a trap,an overflow pipe,and adapters.

Basket Capital

A capital having a shape similar to an inverted bell that is ornamented with surface work similar to basket weave.

Basket Newel

A newel at one end of a handrail at the bottom of a flight of stairs;has the overall shape of a tall cylindrical basket.

Basket Weave

A checkerboard pattern of bricks,flat or on edge.

Basket-handle Arch,basket Arch

A flattened arch whose ellipse-like shape is determined by three arcs that are interconnected,each arc being drawn from a different center of curvature;also called a semielliptical arch or an elliptical arch.

Basket-weave Bond

A brick bond arrangement having a checkerboard pattern.

Basse-cour

See base-court.

Basswood,American Linden

A cream colored,fine-textured,moderately low-density wood of North America;used extensively for ply wood, lumber core,and trim.

Bastard

A nonstandard item;one of irregular or abnormal size or shape or of inferior quality.

Bastard Bond

Same as header bond.

Bastard File

One of four principal classifications of files which are graded according to coarseness (coarse,bastard,second,smooth).

Bastard Granite

A quarry term for gneissic granites;not considered a true granite;used in wall construction.

Bastard Joint

Same as blind joint.

Bastard Masonry

See bastard ashlar. 

Bastard Pointing

See bastard tuck pointing. 

Bastard Spruce

Same as Douglas fir.

Bastard Stucco

Plaster applied in three coats:a scratch,a brown,and a finish coat.

Bastard Tuck Pointing,bastard Pointing

An imitation tuck pointing in which the external face is parallel to the wall,but projects slightly and casts a shadow.

Bastard-sawn

See plain-sawn.

Bastide

1.A medieval settlement built for defense purposes and generally laid out with a geometric plan,esp.in France.2.A small rural dwelling in southern France.

Bastille House

A bastel house.

Bastille, Bastile

1.A fortification or castle,frequently used as a prison.2.A tower or bulwark in the fortifications of a town.

Bat Bolt

A bolt barbed or jagged at the butt,or tang,to give it a firmer hold.

Bat Insulation

Same as batt insulation.

Bataan Mahogany

Same as tanguile.

Batch

1.A quantity of concrete or mortar mixed at one time.2.A quantity of adhesive mixed at one time.

Batch Box

A container of known volume used to measure and mix the constituents of a batch of concrete,plaster,or mortar,to ensure proper proportions.

Batch Mixer

A machine that mixes grout,mortar,or concrete in batches in contrast to one that mixes continuously.

Batch Plant

An operating installation of equipment including batchers and mixers as required for batching or for batching and mixing concrete materials;also called a mixing plant when mixing equipment is included.

Batched Water

The mixing water added to a concrete or mortar mixture before or during the initial stages of mixing.

Batcher

A device for measuring ingredients for a batch of concrete.

Batching

Weighing or measuring the volume of the ingredients of a batch of concrete or mortar,and then introducing these ingredients into a mixer.

Batement Light

A window with its lower edge cut diagonally rather than horizontally so as to fit an arch or rake below;esp.used in perpendicular tracery.

Bath

1.An open tub used as a fixture for bathing.2.The room containing the bathtub. 3.(pl.) The Roman public bathing establishments,consisting of hot,warm,and cool plunges,sweat rooms,athletic and other facilities;balnea,thermae.

Bath Trap

The P trap in the waste line of a bathtub.

Bathhouse

1.A building equipped with bathing facilities.2.A small structure containing dressing rooms or lockers for bathers,as at the seaside.

Bathroom

A room containing a water closet,a lavatory,and a bathtub and/or shower.

Bathroom Cabinet

Same as medicine cabinet.

Bathtub

A tub for bathing,usually a fixed plumbing installation designed for one person.