Line & Line Values Drawing Project Plans

Line & Line Values Lines are the fundamental single entity on a drawing. Lines are used to illustrate and describe the shape of the object. Lines must be clearly visible and stand out in sharp contrast to one another To ensure visibility, guidelines must be followed. Line width: Thick - .030 to .038 inch wide Thin - .015 to .022 inch wide

LINE Guidelines All lines should be sharp, clean-cut, uniform, and properly spaced. Line Descriptions: Object (Visible) line Hidden line Center line Section line Extension, Dimension, and Leader Lines Phantom line

Line Descriptions Object (Visible) Line: Represents all visible edges on the object. Drawn wide and dark Makes is more visible, hence the name.

Object Line Draw a square that is 3 inches tall and 3 inches long. 3”

Line Descriptions Hidden Lines: Used to show surfaces, edges of an object that are hidden from plain view. Drawn dark, but narrow with dashes.

Hidden Line Now, draw a vertical hidden line 2 inches from the left side. 3” 3”

Line Descriptions Center Line: Used to show or locate the centers of circles or symmetry of an object. Represents paths of motions Lines are dark and narrow, that start and end with dashes.

Center Line Now, draw two center lines on both sides, one inch from the side and one inch from the bottom. The hole is 3/4 inch wide. 3” 3”

Line Descriptions Section Line: Surface that comes in contact with the cutting plane. Lines are narrow, but dark. Drawn on a 45 degree angle

Line Descriptions Extension, Dimension, and Leader Lines: Lines are narrow, but dark. Dimension Lines: Contain the dimension value. Terminal ends of the lines contain and arrowhead tip Extension Lines: Define the limit of the dimension Leader Lines: Line that radiates from a note or dimension figure Arrowhead point drawing

Leader Line Now, leader lines indicating at the 4 inch hidden line, the metal will be bent at a 90 degree angle. Also, indicate with a leader line, the size of hole the circles will need to be drilled. 38” 5” 5”

Line Descriptions Phantom Line: Used to indicate alternative positions of moving parts. Line is narrow, but dark. Drawn with a continuing pattern of a long and two short dashes.

Line Value Worksheet