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Chapter 4

Drawing Instruments and Techniques

TermDefinition
Alphabet of Lines The standardized collection of line types used in drafting, both manual and CADD.
Border Lines Very heavy lines used to form a boundary for the drawing.
Centerlines Indicate the center of holes and symmetrical objects such as windows and doors.
Construction Lines Very light lines (in manual drafting) or temporary lines (in CADD) used in the process of constructing a drawing; they are to help the drafter and should not reproduce when a print is made.
Crosshatch Lines Used to show that the feature has been sectioned; also called lines.
Cutting-Plane Lines Heavy lines used to show where the object is to be sectioned.
Dimension Lines Used to show size and location.
Extension Lines Used to denote the termination point of a dimension line.
Floor Plan Identifies the location and dimensions of exterior and interior walls, windows, doors, major appliances, cabinets, fireplaces, and other fixed features of the house; section view taken about halfway up the wall.
Freehand Sketching A method of making a drawing without the use of instruments.
Front Elevation The front view of an object.
Grids Available in a wide variety of sizes and forms, they have many uses in manual architectural drafting; some grids are designed to be used under a sheet of tracing paper while others are designed to be drawn on directly.
Guidelines Used for hand lettering a drawing in manual drafting.
Hidden Lines Represent an edge that is behind a visible surface in a given view in the drawing.
Left Side Elevation The left side view of an object.
Long Break Line Used to show a break when the break is two or three inches in length.
Object Lines Show the outline of the main features of the object.
Orthographic Projection A means of representing the height, width, and depth of a three-dimensional object on two-dimensional paper.
Plan View The top view of a house or other object.
Proportion The relation of one part to another, or to the whole object.
Rear Elevation The rear view of an object.
Right Side Elevation The right side view of an object.
Section Lines Used to show that the feature has been sectioned; also called crosshatch lines.
Short Break Lines Used where part of the object is shown broken away to reveal an underlying feature or part of the object removed for some other reason.
Symbols Library A collection of drafting symbols saved to a file that can be quickly inserted into a CADD drawing.
Templates Serve as a guide in drawing special lines or symbols.
Created by: Rankin5404
 

 



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