Architectural and Engineering Glossary

D

Draught Stop

Same as fire stop.

Draw Cock

See pet cock.

Draw Curtain

A theater curtain that moves horizontally,usually divided in the middle so that each half can be pulled to one side of the stage.

Draw In Box

Same as pull box.

Drawbolt

Same as barrel bolt.

Drawdown

The distance by which the ground water level is lowered as a result of pumping.

Drawer Kicker

A wood piece which prevents a drawer from tilting downward when it is pulled out.
 

Drawer Roller

A device used to ease the sliding of a drawer open or shut,usually by means of a metal or fiber wheel rotating on a metal frame.

Drawer Runner,drawer Slip

In drawer framing,one of a pair of strips on which the drawer slides.

Drawer Slide

A mechanism employing guides and rollers that support a drawer and permit its easy operation.

Drawer Stop

A block which stops the inward movement of a drawer when it has reached its proper position.

Drawing Room

A formal reception room,usually in a prominent location of a large home,mansion,or manor house.

Drawn Finish

A smooth,bright finish on metal tubing,wire,rod,bar,and strip;obtained by drawing the metal through a die.

Drawn Product

A product formed by pulling material through one or more dies.

Drawn Wire

Wire brought to final dimensions by being drawn through one or more dies.

Drawshave

A drawknife.

Drip Line

An imaginary line described on the ground by the outer branch tips of a plant.

Drip Mold, Drip Molding

Same as drip, 1.

Drip Sink,lead Safe

A shallow sink set near floor level to receive the drip from a faucet  or  the like.

Drippage

1.An accumulation of liquid by dripping.2.A dripping of water from the gutters or eaves of a house.

Dripping Eaves

Sloping eaves which project beyond a wall and are not provided with a gutter so that water on the roof falls directly to the ground.

Dripstone

A drip cap made of stone.

Dripstone Course

A continuous horizontal drip molding on a masonry wall.

Driptight

Said of an enclosure constructed so that drops of liquid striking the enclosure (from a specified range of angles) cannot enter it.

Drive Band

In pile driving,a steel band which encircles the head of a timber pile to prevent it from splitting when being driven.

Drive Cap

A steel attachment placed over the top end of a pile to prevent damage while it is driven in the ground.

Drive Nail

See drivescrew.

Drive Point

Same as well point.

Drive Shoe

A reinforcement placed at the bottom of a pile to prevent damage to the pile during driving.

Drive-in

A retail business,bank,or motion picture theater,designed to permit its patrons to receive services while they remain in their automobiles.

Driven Pile

Any pile,such as a precast pile,which is driven into position at its final position at the site.

Driven Well

A well constructed by driving a pipe into the ground;usually fitted with a well point and screen.

Drivepipe

A pipe,one end of which is sharpened for driving it into the ground;used to obtain a sample in situ,to reach water, etc.

Drivescrew, Screw Nail

A type of metal fastener;a helically threaded nail, driven with a hammer;has a higher withdrawal resistance  than a nail with a plain shank;some types may be removed with a screwdriver.

Driveway

A private way or road,which is primarily for use by automobiles.

Driving Band

See drive band.

Driving Machine

The power unit which applies the necessary energy to raise and lower an elevator or dumbwaiter car or to drive an escalator,moving walk,or the like.

Driving Resistance

The number of blows of a pile-driving hammer which are required to advance the point of a pile a specified distance into the subsoil.

Drn

Abbr.for drain or drainage.

Dromos

The long,deep entrance passageway to an ancient Egyptian tomb or a Mycenaean bee hive tomb.

Drop Black

See animal black.

Drop Bottom-seal

See automatic door bottom.

Drop Box

An electric outlet box hung from above, as in a theater stagehouse where it is fed by a cable from the overhead gridiron.
 

Drop Ceiling

See dropped ceiling.

Drop Chute

A device used to confine or to direct the flow of a falling stream of concrete;may be articulated or may be fabricated of heavy rubberized canvas.

Drop Cloth

A large sheet of cloth,paper,or plastic which is spread over a floor,furniture,etc.,as a protection against paint drippings and splatter.

Drop Cord

An electric-light cord suspended and energized from a ceiling outlet.

Drop Curtain

On the theater stage,any curtain that moves up and down,rather than from side to side.

Drop Elbow

A pipe elbow,1 having lugs on the sides for attaching it to a support.

Drop Ell

Same as drop elbow.