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DADO JOINT: A groove
cut across the face of a board to receive the end of another board.
Often used in quality shelf and cabinet construction.
DAMPER: A movable plate which regulates the draft of a stove, fireplace,
or furnace.
DEAD LOAD: All the unmovable weight in a structure and the weight
of the structure itself.
DEED: A document indicating that the ownership of land has been
transferred from one person to another.
DIMENSION LUMBER: Framing lumber which is 2 in. thick and from 4
to 12 in. wide.
DOME: A roof used over an entryway or a complete structure in the
form of a hemisphere.
DOME STRUCTURES: Structures incorporating design elements of the
geodesic dome or triangular space frames.
DOORJAMB: Two vertical pieces held together by a head jamb forming
the inside lining of a door opening.
DOORSTOP: The strips on the doorjambs
against which the door closes.
DORMER: An opening in a sloping roof,
the framing of which projects out to form a vertical wall suitable
for windows or other openings.
DOUBLE GLAZING: Making a pane of two
pieces of glass with air space between and sealed to provide insulation.
DOUBLE HEADER: Two or more timbers joined
for strength.
DOUBLE HUNG: Refers to a window having top and bottom sashes, each
capable of movement up and down.
DOUGLAS FIR: A yellow to pale reddish
soft wood. The leading veneer wood primarily converted into plywood
and widely used in building and construction. Lumber used in general
construction. Mill products used for sash, flooring, and doors.
DOWNSPOUT: A pipe, usually of metal,
for carrying rainwater from roof gutters.
DRESSED SIZE: The actual size of lumber
after jointing and surfacing.
DRIP CAP: A molding placed on the exterior
top side of a door or window frame to cause water to drip beyond
the outside of the frame.
DRY WALL: Interior covering material,
such as gypsum board or plywood, which is applied in large sheets
or panels.
DRY WELL: A pit located on porous ground,
walled up with rock, which allows water to seep through; used for
the disposal of rain water or as the effluent from a septic tank.
DUCTS: In a house, usually round or rectangular
metal pipes for distributing warm air from the heating plant to
rooms, or air from a conditioning device or as cold air returns.
Ducts are also made of composition materials.
DUPLEX OUTLET: Electrical wall outlet
having two plug receptacles.
DWARF WALL: A low wall built to retain
an excavation or embankment
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EARNEST MONEY: A partial payment made as part of the pur- chase
price to bind a contract for property.
EARTH SHELTERED DWELLING: A structure
which uses soil to reduce heat loss (or gain).
EASEMENT: An area of a piece of property
given rights to another for the purpose of placing power lines,
drains, and other specified uses.
EASTERN FIR: A softwood similar to spruce
in its general characteristics. Used for siding, moldings, and general
construction.
EAVES: The lower portion of the roof
that overhangs the wall.
ELL: An extension or wing of a building at right angles to the main
section.
ESCUTCHEON: Door hardware which accommodates
the knob and keyhole.
EXCAVATION: A cavity or pit produced
by digging the earth in preparation for construction.
EXPANSION JOINT: A bituminous fiber strip
used to separate blocks or units of concrete to prevent cracking
due to expansion as a result of temperature changes.
EXPANSIVE CLAY: A type of soil
which swells when wet
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