Architectural and Engineering Glossary

B

Barrel Bolt,tower Bolt

A door bolt which moves in a cylindrical casing;not driven by a key.

Barrel Ceiling

A ceiling of semicylindrical shape.

Barrel Drain

Any drain which is cylindrical in shape.

Barrel Fitting

A short length of threaded connecting pipe,as a nipple.

Barrel Nipple

A barrel fitting threaded at each end.

Barrel Roof,barrel Shell Roof

1.A roof of semicylindrical section;capable of spanning long distances parallel to the axis of the cylinder.2.A barrel vault.
 

Barrel Shell

A reinforced concrete scalloped roof that spans a structure in one direction as folded-plate construction,and in the other direction as a barrel vault.

Barreling,tumbling

The application of paint to small articles by tumbling them in a barrel containing paint.

Barricade

An obstruction to deter the passage of persons or vehicles.

Barrier Fort

1.One of a number of mutually supporting medieval forts which protect a large area of the countryside.2.A fort that can with stand a limited siege.
 

Barrier Free

Said of a building or facility that is accessible to the handicapped.

Barrow

1.A wheelbarrow.2.An elongated artificial mound protecting a prehistoric chamber tomb or passage grave.

Barrow Area

An area that serves as a source of fill, providing soil which is used to raise an existing grade elsewhere.

Barrow Hole

A hole that is left open in an exterior wall during a building’s construction to provide access to the interior.Upon completion of construction,the hole is closed up.

Barrow Run

A temporary pathway of wood planks or sheets to provide a smooth access for wheeled materials handling carriers on a building site.

Barryesque

A variation of the Italianate style introduced by Sir Charles Barry,an outstanding Victorian architect who designed the Houses of Parliament.

Barstone

Before the invention of grates in a fireplace,one of two upright stones placed in the fireplace to receive the ends of a metal bar on which meat was roasted.

Bartisan

Same as bartizan.

Bartizan

On a fortified wall,a small overhanging structure with lookout holes and loops,often at a corner or near an entrance gateway.

Barway

A gate opened by moving a bar or bars.

Barytes

Same as barite.

Bas-relief,basso-relievo,basso-rilievo

A carving,embossing,or casting moderately protruded from the background plane;low relief.

Bas-taille

Same as bas-relief.

Basalt

A dark,fine-grained,igneous rock used extensively for paving stones,but rarely for building stone.

Bascule

A structure that moves about a horizontal axis,as a seesaw,with a counterbalance at one end.

Base Anchor

The metal piece attached to the base of a doorframe for the purpose of securing the frame to the floor;either fixed or adjustable.

Base Bid

The amount of money stated in the bid as the sum for which the bidder offers to perform the work,1 not including that work for which alternate bids are also submitted.

Base Cap

See base molding.

Base Clip

Same as base anchor.

Base Coat Floating

he spreading,compacting,and smoothing of the base coat of plaster so that it is finished to a reasonably true plane.

Base Elbow

A cast iron pipe elbow having a baseplate or flange cast on it,by which it is supported.

Base Line

A surveyed line which has been established with more than usual care,and to which surveys are referred for coordination and correlation.

Base Map

In urban planning,a map indicating the significant existing physical features of an area,i.e.streets,rivers,parks,railroads,etc.and serving as a foundation for all subsequent mapping.

Base Metal

The metal to be welded or soldered (as distinguished from filler metal which is deposited during the joining process).

Base Molding

Molding used to trim the upper edge of interior baseboard;a base cap.

Base Ply

In roofing:the layer of felt secured to the deck over which a built up roof is applied.

Base Screed

A metal screed having expanded or short perforated flanges;acts as a dividing strip between plaster and cement;provides a ground (guide) to indicate proper thickness of plaster and cement.
 

Base Sheet

Saturated and/or coated felt sheeting which is laid as the first ply in a built up roofing membrane.

Base Shoe Corner

A molding piece or block applied in the corner of a room to eliminate the need for mitering the base shoe.
 

Base Table

A base molding.

Base Tee

A pipe tee with a connected baseplate for supporting it.

Base Temperature

The reference temperature given in the definition for degree day.

Base Tile

The lowest course of tiles in a tiled wall. 

Basebead

Same as base screed.

Baseboard Heater

A heating system in which the heating elements are installed in panels along the baseboard of a wall.

Baseboard Raceway

A channel having a removable cover,sometimes installed along a baseboard in an existing building to house wiring.Removal of the cover provides easy access to the wiring.

Basement Barn

A term sometimes used for bank barn.
 

Basement House

A house whose rooms are mainly located above ground level but whose entrance,from the exterior,is at ground level or one floor above.

Basement Soil

See subgrade.

Basement Stair

A stairway connecting the basement or cellar with the level of the living area.