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Chapter 4
Drawing Instruments and Techniques
Term | Definition |
---|---|
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. |