ATA Codes Flashcards
Visible Lines
Used for all lines on the drawings representing visible lines on the object.
- Thick
Hidden lines
Indicate invisible edges or contours.
Consist of short evenly spaces dashes.
*Medium
Center lines
Made up of alternate long and short dashes.
Indicate the center of an object or part of an object.
*Thin
Dimension Lines
A light solid line, broken at the midpoint for insertion of measurement indications.
Have opposite pointing arrowheads at each end to show origin.
*Thin
Extension lines
Thin lines used to move the dimension from the surface of the object to a point where the dimension won’t interfere.
*Thin
Cutting plane lines
Indicate the plane in which a sectional view of the object is taken.
Last step in making a sketch
Put in dimensions
Phantom lines
Indicate the alternate position of parts of the object or the relative position of a missing part.
Composed one long and two short evenly spaces dashes.
Angle in Isometric
30
Which lines are in relation to dimension lines?
Extension lines
Break lines
Indicate that a portion of the object is not shown on the drawing
*Short breaks - made by solid freehand lines
*Long breaks - solid ruled lines with zigzags
Leader lines
Solid lines with an arrowhead and indicate a part or portion to which it references to
Sectioning lines
Generally thin lines, that indicate the surface of an object that has been cut to make it stand out from the rest of the object.
Indicate type of material from which the object is made
Detail Drawings
Includes all the information needed to fabricate the part.
Assembly Drawings
Shows how two or more components are assembled.
