Autodesk 235B1-05A761-1301 - AutoCAD MEP 2010, User Manual

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display properties Display properties affect the way an object appears in the drawing. You can override the
default properties for the current display configuration by changing visibility, layer, color, linetype, hatching,
and cut plane height for an object.
display range Range of elevation above and below the cut plane
display representation A level of display control in which the user can specify settings such as layer, color,
linetype, and visibility for individual components of objects.
display set A saved set of display representations, which can be associated with a display configuration. See
also display configuration and display representation.
documentation Any output records of a building project, consisting of working drawings, specifications,
schedules, and other information pertaining to the building.
documentation phase The phase of a project in which annotation is added to drawings to clarify and record
design specifications as well as to reference together the complete set of construction documents. See also
annotation.
documentation symbols See annotation.
domain In Content Builder a family defined by a set of common characteristics within a specified engineering
industry. A fixed list of part groups, where each group is based on one type of building systems component,
such as duct, pipe, cable tray, conduit, plumbing, or MvPart. Each group has a unique behavior in AutoCAD
MEP according to component type.
downstream fixture units The calculated value of all connected fixtures.
drag point The point that an AutoCAD block rotates around. Also referred to as the block’s insertion point.
draw The amount of current required to operate an electrical device. See also amperage.
drawing area The area on screen in which your drawings are displayed and modified. The size of the drawing
area varies, depending on the size of the AutoCAD window and on the number of toolbars and other elements
that are displayed.
drawing environment settings The variables and settings for new drawings as defined by the default
template drawing. See also template.
drop (voltage) The net difference in electromotive force when measured on both sides of impedance.
duct A pipe or closed conduit, made of sheet metal, fiberglass board, or other suitable material, used for
distributing air to and from a supply source, such as an air handling unit.
duct and pipe length The actual length of a duct and pipe segment. You can break segments or an entire
run into several segments.
duct fan A piece of equipment mounted in a section of duct to move conditioned air.
duplex receptacle A commonly used receptacle (outlet) that has 2 plug-in sockets; typical wall outlet.
DWG Standard file format for saving vector graphics from within AutoCAD.
DWT Standard file format for AutoCAD template files. See also template.
edge offset The distance from the face of a component to a specific baseline.
elbow An angled fitting that changes the direction of a run. Typical angles are from 22
1
/
2
degrees to 90
degrees.
elbow angle The radius to use when laying out ducts, pipes, conduits, and cable trays using the Routing
layout method.
elevation (1) The default Z value above or below the XY plane of the current user coordinate system; used
for entering coordinates and specifying locations.
808 | Glossary