Term Definition
Draft Gauge 1 like
Instrument employed to measure air movement due to air pressure differences
Draft Indicator 1 like
Instrument employed to measure and record chimney draft or combustion gas movement; draft is measured in units of .10 in. of water column
Draft Regulator3 likes
draft regulator
Device maintaining a specific draft in a combustion-heated appliance, by automatically controlling the chimney draft to a particular level
Drafter 0 likes
Drafting Board1 like
drafting board
A flat surface used by drafters to draw on
Drafting Machine 0 likes
A drafter’s mechanical device with adaptable straight edges that clamps onto a drawing board
Draftsman 0 likes
A person who prepares architectural, construction, or engineering drawings
A person who drafts documents
Drag 0 likes
Distance between the exit point for cutting oxygen stream and the projection on the exit surface of the entry point in welding
Drag Strut 0 likes
A structural part that transfers lateral forces from one vertical part to another
Dragging 0 likes
See Floating
Dragline 0 likes
A bucket attachment for a crane that excavates soft materials at some distance from the crane, and draws the bucket to itself using a cable; commonly employed in a marsh or marine areas
Dragons Blood 0 likes
A red gum employed for temporary coloring of varnish
Drain1 like
A trench, ditch, or pipe to move waste water away
A device that captures the flow of water from a roof
Drain Board1 like
drain board
The countertop next to a sink; a sloping tray that drains liquids.
Drain Field 0 likes
Trenches filled with sand, gravel or crushed stone, along with pipes, that transfer septic tank effluent into nearby soil
Drain Intercepting (Curtain Drain) 1 like
A drain diverting ground water before it reaches an area to be safeguarded; See Intercepting Drain
Drain Pipe1 like
drain pipe
Pipe that transports waste in a building‘s drainage system
Drain Tile1 like
drain tile
Perforated corrugated pipe laid at the bottom of the foundation wall to drain water from the foundation; stops ground water from leaking or seeping through the foundation wall; also called perimeter drain
Drain, Waste and Vent (DWV) System 0 likes
Pipe system for the elimination of liquid or solid wastes, and sewer gases
Drainage 0 likes
Draining a building or land of moisture or sewage
A system of artificial or natural drains
Drainage Head 0 likes
The furthest or most elevated areas in a drainage area
Drainage Pipe1 like
drainage pipe
Any pipe in a plumbing system which eliminates rainwater, wastewater, or sewage
Drainage System 0 likes
All drain and waste pipes that transfer water and wastes away from built up areas
Drainage, Underslab 0 likes
Continuously intercepting and removing ground water from under a concrete slab through crushed stone and perforated pipe
Drape1 like
A window covering or a curtain
Drapery 0 likes
Fabric hangings employed as a curtain
Drapery Rod2 likes
drapery rod
A wall-mounted wood or metal rod that supports drapery
Drapery Track 0 likes
A U-shaped device installed on a door, ceiling, floor, or window header, to guide draperies
Draughtsman 0 likes
Draftsman; drafter
Draw 2 likes
Progress billings available to a contractor who is under contract with a fixed payment schedule
Draw Board 0 likes
A board fitted in a kitchen cabinet that may be pulled out like a breadboard to provide more work surface
Drawboard Joint 0 likes
A mortise-and-tenon joint with holes so that when a pin is inserted, the joint constricts
Drawbridge 1 like
A bridge over water that is raised or lowered to control the passage of ships
Drawer1 like
A sliding, storage box forming part of a cabinet
Drawer Knob1 like
drawer knob
A cabinet knob
Drawer Pull1 like
drawer pull
A handle used to open a drawer
Drawer Roller1 like
drawer roller
A device employed to facilitate a drawer sliding open or shut; commonly has a metal or fiber wheel that revolves in a metal frame
Drawer Slides1 like
drawer slides
A mechanism with guides and rollers to support the drawer to facilitate functionality
Drawing Room 1 like
A formal reception area; a retiring room
Drawings 0 likes
Graphic illustrations of the design, whereabouts, and dimensions of the parts of a certain project
Line drawing
Drawn Glass 2 likes
Glass sheet pulled directly from a molten glass container
Drayage 0 likes
Delivery charge for goods shipped
Dredge 0 likes
To deepen a waterway with a dredging machine, normally mounted on a barge
Dressed and Matched (D&M) 1 like
Tongued and grooved; Center Matched; see Tongue and Groove
Dressed Size 0 likes
Lumber dimensions after surfacing with a planing machine; generally ½ inch to ¾ inch less than the original size
Dressing Room 0 likes
Room for dressing, storing clothes, and applying makeup in a home or theater
Drier1 like
Substance or device employed to extricate moisture from a refrigeration system
A solution added to drying oils in paint to speed up drying
Composition of certain metals that accelerate drying action of oil when added to paint or varnish; available dry or as paste, but most are metallic soaps such as lead, manganese and cobalt in oils and volatile solvents; also known as driers, oil driers, liquid driers, Japan driers, and Japans
Drift 0 likes
Lateral displacement or movement of a structure due to lateral forces
Spray loss; occurs when using a spray gun; also called Overspray
Drift Pin1 like
drift pin
A steel rod employed to align the holes for bolts in steel connections during assembly
Drill1 like
Common name for a small boring bit and for its electric drill
Drilled Well 1 like
A well made from the process of using a rotary drill to dig for water
Drilling Rock 0 likes
Boring holes into a rock
Drip 1 like
Part of a cornice or horizontal exterior finish course with a projection that facilitates water removal
Sill or drip cap groove positioned on the underside; ensures that water drips from the outer edge instead of drawing back and trickling down the building facade
Drip Cap2 likes
drip cap
Molding or metal flashing that is positioned on the outside top part of a door or window frame; enables water to dribble further than the exterior portion of the frame
Drip Edge 0 likes
A discontinuity or protruding strip mounted on roof eaves or above a window or wall member, redirecting drops of water away from the front of the building so that they don’t cause damage to the building
Drip Loop 0 likes
A low area in an airborne wire that permits moisture and rainwater to trickle off before the wire reaches the building or structure
Drip Pan1 like
drip pan
Trough-shaped panel that collects condensation from an evaporator
Drippage 0 likes
Seepage of roofing bitumen through cracks in the roof deck or over its edges
Drive Screw1 like
drive screw
A screw inserted with a hammer but must be removed with a screwdriver
Drive-Up Window 0 likes
An opening in a wall through which goods can be sold between people in vehicles and vendors behind the wall
Driveway 0 likes
A pathway that accommodates automobiles on private property
Driveway Apron 1 like
Inclined transition from a public street to a private driveway
Driving Cap 0 likes
A steel cap located above a pile to protect vehicles
Drop Black 0 likes
Bone Black
Drop Cloth1 like
drop cloth
A canvas, plastic, or paper material employed by painters to cover floors and furniture to protect them from unnecessary damage
Drop Match 0 likes
See Set Match
Drop Panel 0 likes
Broadening of a two-way concrete floor structure at the column head
Dropback 0 likes
Softening Point Drift
Drum Trap2 likes
drum trap
A cylinder-shaped plumbing trap with a lid, closed at the base; the pipe from the fitting enters the trap near the base; the space between the pipe‘s entrance and the base is the settling area, and the outlet to the waste pipe is located higher in the trap
Dry Air 0 likes
Air without water vapor
Dry Bulb Temperature 1 like
Air temperature measured by a standard thermometer; compared to Wet Bulb Temperature
Dry Bulb Thermometer 0 likes
A standard thermometer for measuring ambient air temperature; compare to Wet Bulb Thermometer
Dry Capacitor Condenser 0 likes
Electrical apparatus composed of dry metal and insulation
Dry Cell Battery2 likes
dry cell battery
Electrical device furnishing DC electricity, without liquid in its cells
Dry Cleaner1 like
dry cleaner
An apparatus for laundering fabrics using mainly natural solvents that are not water-based
Dry Edging 0 likes
Coarse edges and corners of glazed ceramic ware as a result of inadequate coating
Dry Film Thickness 0 likes
Dry coating depth, expressed in mils
Dry Ice 0 likes
Refrigerating material composed of frozen carbon dioxide that transforms directly from a solid state to a gaseous state at -109 F (-78 C)
Dry In 0 likes
To mount black roofing felt onto a roof
Dry Kiln 0 likes
A cavity with regulated air flow, temperature, and humidity for employed for drying lumber, veneer, or other wood materials
Dry Lap 0 likes
Without bitumen when two roofing felts overly each other
Dry Location 0 likes
A location not normally exposed to moisture, but may be temporarily subject to dampness or moisture, such as during construction
Dry Mi 0 likes
A concrete or mortar mixture that has no water or very little water
Dry Oil 1 like
See Dehydrated Oil
Dry Out 0 likes
Occasional condition associated with gypsum plaster work where too much evaporation or suction has lost water critical for crystallization; has a light colored, crumbly space appearance
Dry Pack 0 likes
Cement and fine aggregate mixture with sufficient moisture to achieve hydration, but dry enough to be forced into position
Dry Packing 0 likes
Positioning of close to zero or zero slump, concrete, mortar, or grout by forcing it into an enclosed space
Dry Press Brick 0 likes
Brick produced in molds from fairly dry clay under elevated pressure, with 5 to 7 percent moisture
Dry Rot 0 likes
Dry flakey rot when in an advanced stage, allows wood to be easily crushed into a dry powder; not application to any form of decay, as all fungi need substantial moisture for growth
Dry Set Mortar 0 likes
A water-retaining hydraulic cement mortar with sand or without it; when employed, the tile and walls do not need to be dampened during installation
Dry Set Tile 0 likes
Tile fixed into an adhesive that is seemingly dry, but sticks on contact
Dry Sheet 0 likes
Roofing felt ply mechanically secured to the deck to stop asphalt or pitch from dripping down into the building; not a component of built-up roofing units
Dry Spots 0 likes
Small areas on the front surface of tile that have not been unsatisfactorily glazed
Dry Spray 0 likes
A paint defect where the paint pigment is not being secured properly by the binder, or where the binder evaporates before the paint makes contact with the surface; atomized paint that produces a sandy finish, as the spray particles are only partly dry when connecting with the surface
Dry Sprinkler System 1 like
A fire extinguishing sprinkler unit in which the pipes are empty until the system is galvanized
Dry Stone Wall 0 likes
A wall of stone that has been built without mortar or concrete in the joints
Dry System 0 likes
Refrigeration system which maintains evaporator liquid refrigerant primarily in the atomized or droplet state
Dry Tape 0 likes
Placing tape over gypsum board joints with adhesives other than normally used joint compound
Dry To Handle 0 likes
A film of paint hardened enough so that it is durable when handled
Time period between application and the ability to handle without harm
Dry To Recoat 0 likes
Time period between a paint application and the ability to properly add the next coat
Dry To Touch 0 likes
A layer of paint hardened enough so that it may be touched gently without any paint remaining on the fingers
Dry Type Extinguisher1 like
dry type extinguisher
A fire extinguishing system that disperses dry powder through compressed gas
Dry Type Spray Booth 0 likes
A spray booth where inhibitor has been included in the paint to stop the surface from drying too quickly, producing wrinkling or ruptures
Dry Type Transformer 0 likes
A transformer whose coils and core are not submerged in an oil bath
Dry Vent1 like
dry vent
A plumbing vent that does not convey liquids; it acts solely as a vent and simply conveys air
Dry Well 0 likes
A deep hole in the ground, covered and normally lined with rocks, that holds drainage water until it seeps into the ground
Dryer 0 likes
A device that dries out the aggregates, then heats them to specific temperatures
Dryer (Coin) 0 likes
See Coin Dryer
Dryer (Darkroom) 0 likes
See Darkroom Dryer
Dryer Receptacle1 like
dryer receptacle
An electrical outlet wired according to specific electric current requirements and the clothing dryer configuration
Drying 0 likes
Changing from liquid to solid state by means of evaporation of uncombined water and volatile thinners, and also by oxidation of oils
Drying Oil 0 likes
An oil which accepts oxygen, becoming hard, tough, and flexible when a thin film is in contact with the air; drying oils are employed while manufacturing paints and varnishes; linseed oil is a widely used drying oil
Drying Shrinkage 0 likes
Decrease in the size of concrete when it dries
Drying Time 0 likes
Time period between final cure and initial application
Dryness 0 likes
No liquid
Amount of free moisture in gypsum board products
Drywall (Gypsum Wallboard, Sheet Rock or Plasterboard) 0 likes
Drywall Panel Hoist1 like
Drywall Panel Hoist
This hoist holds a 4 foot by 8-foot or a 4 foot  by 12-foot drywall sheet in place on the ceiling during fastening.
Drywall Removal 0 likes
Demolishing and removing old drywall from a building or structure
Drywall Studs 0 likes
Light gauge metal vertical members that fit into the light frame construction to support gypsum wallboard sheets; employed for constructing interior non-bearing partitions
Drywall Track 0 likes
The horizontal light gauge metal top and bottom wall framing in an inside gypsum wallboard non-bearing partition
Drywood Termites 0 likes
See Termite
DS 0 likes
DS Glass 1 like
Double-strength window glass
Dual Duct Air Handling System 0 likes
A system resembling a multi-zone assembly, with the exception that segregated hot and cold ducts are positioned to the area to be conditioned where a terminal mixing box is located; a continual supply of air is provided
Dual Glazing 0 likes
Double Glazing
Dual Vents 0 likes
A plumbing vent connecting two fixture drains; serves as a back vent for the traps of both fixtures
Duct1 like
A channel, tube, or pipe that conveys gases, liquids, or wires
Duct Bank 0 likes
Group of rectangular or circular metal pipes that deliver warm or conditioned air throughout a structure or building
Duct Heater1 like
duct heater
A hot water or electric-resistance heater installed in an air duct to furnish additional heat to the distributed air; Heating element in the duct of an air-handling system
Duct Insulation2 likes
duct insulation
Material installed in the HVAC duct system to reduce fire hazards, and serve as thermal insulation
Duct Shaft 0 likes
An upright, lined shaft in a building, normally fire-rated, through which air ducts and piping are positioned
Duct Tape1 like
duct tape
Sturdy adhesive tape that is employed to construct and restore light gauge air ducts
Duct, Bus 0 likes
See Bus Duct
Duct, Feeder 0 likes
See Feeder Duct
Duct, Underfloor 0 likes
See Underfloor Duct
Ductile 0 likes
1.Capable of being shaped into a new form
Metals that are capable of being drawn out into thin wires or threads
Ductile Iron Pipe 0 likes
Iron pipe that is fabricated so that it is flexible; has non-corrosive qualities of cast iron although it is not fragile; handles like steel
Ductile Moment Resisting Space Frame 0 likes
A three-dimensional structural assembly with no bearing walls, consisting of interconnecting components that can withstand lateral forces; may also receive the help of horizontal diaphragms
Ductility 0 likes
The ability to deform substantially under weight before breaking, as opposed to brittleness and inflexibility
The ability of a substance to be drawn out or stretched thin as in wires and threads
The characteristic of a material that enables it to be shaped or bent without breaking; for example, steel is less ductile than copper
Ducts1 like
Spherical or rectangular metal pipes installed that deliver conditioned air from the furnace to various rooms in a home; also a galvanized metal or stiff fiberglass tunnel that conveys air from the ventilation opening or heater to the various rooms in a building
Ductwork 0 likes
The rigid sheet material from which the HVAC system ducts are fabricated; usually produced from galvanized sheet steel, stainless steel, or aluminum
Due Process 0 likes
A fundamental, constitutional assurance that all legal proceedings will be fair and that a party will be provided with notice of proceedings and an opportunity to be heard before any loss of life, liberty, or property; additionally, constitutional assurance that a law is reasonable, and not arbitrary or capricious
Due-on-Sale 0 likes
A clause in a mortgage agreement stipulating that a borrower must pay the remaining balance when the property is sold or transferred
Dull 1 like
Colors, either neutral or grayish
Dull Rubbing 0 likes
Rubbing a dry layer of finishing material to a lackluster finish, frequently with abrasive paper, steel wool or pumice stone
Dulling 0 likes
Losing sheen or glossy characteristic
Dumbwaiter 0 likes
A small elevator employed for transporting food, utensils, or materials from to the various floors in a multilevel building
Dummy Joint 1 like
A dummy joint is a joint in sidewalks and patios for design purposes;
Dummy Trim1 like
dummy trim
A hardware trim, with the exclusion of a lock, normally on the stationary door in a door pair
Dump Fee 0 likes
The money required to discard worksite garbage in a landfill or dumpsite
Dump Truck 0 likes
A truck employed for transporting and discarding junk and garbage
Dumpster 1 like
A large metal receptacle that holds and transports garbage
Dumpy Level 0 likes
An Engineers Level
Dunnage 0 likes
Loose materials surrounding cargo to minimize damage
Scrap gypsum board that safeguards gypsum wallboard that is being transported
Dunting 0 likes
Cracks in fired ceramics as a result of heat-induced stresses
Duple 0 likes
A house for two families
Duplex apartment
Duplex Apartment 0 likes
An apartment that has rooms on two floors
Duplex Bo 0 likes
An electrical container that holds duplex outlets or wiring switches
Duplex Nail1 like
duplex nail
A double-headed nail
Duplex Paper 0 likes
Wallpaper where two separate papers are adhered to each other resulting in a remarkable embossed appearance
Duplex Plate1 like
duplex plate
A protective, finished plate mounted over duplex switches or outlets
Duplex Receptacle1 like
duplex receptacle
A double electric outlet
Dura Board, Dura Rock1 like
dura board
A panel composed of concrete and fiberglass, normally employed as ceramic tile backing and found on bathtub decks; also called Wonder board
Durability 0 likes
Ability to exist without significant deterioration for a long period of time; to endure; it can refer to durable goods with a long usable life in economics or durability (database systems) one of the ACID properties; in safety and technology, the following terms indicate durability:
a) Dust resistant
b) Fire resistant
c) Rot-proof
d) Rust-proof
e) Thermal resistant
f) Impact resistant
g) Waterproof
Duration 1 like
The length of an activity, or period of time that something exists
Duress 0 likes
In jurisprudence, duress or coercion indicates a circumstance where a person performs an act as a result of violence, threat or other pressure against the person; Black’s Law Dictionary (6th ed.) defines duress as “any unlawful threat or coercion used… to induce another to act or not act in a manner they otherwise would not (or would)”; pressure exerted upon a person to coerce that person to perform an act that he or she ordinarily would not perform; must be distinguished both from undue influence in the civil law and from necessity
Durham 0 likes
A steel or iron pipe system compose consisting of threaded screw joints; recessed drainage fittings are employed in this system
Dust Cap1 like
dust cap
A cap placed over a mechanism or device to protect it from unwelcome, dust-related debris or materials
Dust Free 0 likes
When dust is not present on a film of paint
Dust Mask1 like
dust mask
A fabric mask worn on the face to filter out dust or other foreign materials
Dust Tight 0 likes
An item built so that dust cannot enter
Dusting 0 likes
The appearance of thin, powdered material on any hard surface, or on concrete due to inadequate curing
The addition of dry portland cement to a damp floor or deck mortar surface; a pure coat is produced by pressure on the dry cement
Dustproof 0 likes
An item built or protected from dust; dust cannot intrude or restrict its efficacious operations
Dutch Bond 0 likes
A bond with courses consisting of headers and stretchers, in masonry; same as English Bond
Dutch Door 0 likes
A door that has two separate hinged leaves, one residing above the other; one door can be opened while the other is shut
Dutch Door Bolt1 like
dutch door bolt
Device for locking the top and bottom leaves of a Dutch door together
Dutch Metal 2 likes
Thin leaves of bright brass that are overlaid in the same way that gold leaf is administered
Duty 0 likes
An obligation imposed by contract, by law, or for moral or religious reasons
Duty, Continuous 0 likes
See Continuous Duty
Dwarf Wall 0 likes
A short wall or partition that does not extend to the ceiling
Dwelling 0 likes
Place where people live, sleep, eat, and prepare food
Dwelling Unit 0 likes
One or more livable rooms inhabited by a single family with facilities for sleeping, living, preparing food, and eating
DWV 1 like
Drain waste vent; the part of a plumbing system transports water and sewer gases from a home
DX 0 likes
Direct Expansion
Dye 1 like
A material employed for staining or dyeing
Dynamic 0 likes
Matter in motion, implying movement or a change of state; such as a hurricane force; the antithesis of static
Dynamic Force 0 likes
A moving force; the equivalent of the product of mass and acceleration
Dynamite 0 likes
An explosive
Dynamo1 like
Electric power generator
Dynamometer1 like
A device that measures a mechanism’s power output or input
Dyne 0 likes
A unit of force that increases its velocity by one centimeter per second along the direction where it performs when acting on a mass of one gram
Denotes elasticity
Denotes electromotive force, expressed in volts
Product of the day


Detergent, alkali, acid, or another cleaning substance Solvent for cleaning paint equipment



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