A Thick line that frames the title block and drawing
A think line that shows the visible edges of an object. The most clearly visible line in a drawing.
A thin dashed line that shows an edge not normally visible in a view. Dashes are 1/8" long with spaces of 1/16"
A thin line that shows the center points of arcs, circles, and the center of symetrical objects. Short dash is 1/8" and long dash ranges from 1/2" to 1-1/2" in length. Center lines always extend 1/4" Beyond the object they are applied to.
A thin line with arrowheads at each end, broken in the middle for the dimension
A thin line that extends from the dimension line to the point on the object to which the dimension refers.
A thin, angled line with an arrowhead at one end and a note or dimension at the other. Used to show the exact location of note or dimension
Cutting Plane Line
A think line that shows where an imaginary cutting-plane passes throughan object
A thin line used to show the surface cut in a section view. Drawn diagonal on each surface touched by the cutting-plane
Standards or conventions to which drawings are drawn
A rounded surface forming two curved lines of intersection or circular edges
Small rounded inside corner of an object
A theoretical line between two views where viwing planes fold
To appear shorter to the eye than it actually is
Inclined Plane or Surface
A plane surface that is foreshortened in two principal viewing planes and an edge view in one other principal viewing plane
A true size of a plane that is parallel to one principal viewing plane and shown as an edge view in other two principal views
Oblique Plane or Surface
A plane or surface that is foreshortened in all three principal viewing planes.
A line or surface at a 90-degree angle to another line
Primary Picture Planes
Front, top, or side reference planes
To turn or twist in order to view a particular surface
Small rounded outside corner of an object
Non-intersection lines, not parallel to each other or to the principal views
A surface that is shown in its actual size
Distance from the front to the back plane
All views are projected onto planes located behind the object
Distance form the bottom plane to the top plane
Straight element that is generated by a moving point and has extension only along the path of the point
Line of Sight
Direction from which an object is viewed
True size plane that is parallel to one principal viewing plane and edge view in other two planes
Method of representing the exact shape of an object in two or more views on planes at right angles to each other
A line 90 degrees to a given projection
Lines which are extended out from the object lines to an adjacent view
Third Angle Projection
All views are projected onto planes lying between the object viewer
To form a mental picture or image
Distance from the left side to the right side of the front or top plane
View that shows the most detail and the fewest hidden lines
Show the height and width dimensions
Shows the Height and depth dimensions
Shows the width and depth dimensions
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