PRIN. OF DRAFTING AND SHOP DRAWINGS - OD1641 - LESSON 1/TASK 1
As the line projection theory was derived from the point projection
theory, so the plane projection theory follows directly from the line projection
theory. If we consider the following axiom:
To a draftsman, a plane
interconnected end to end.
This differs from the geometric concept of planes in that it considers a plane a
finite area, that is, an area with known boundaries. Figure 12 gives the front and
top views of plane 1-2-3-4 and asks for the right side view.
PLANE PROJECTION PROBLEM.
Figure 13 (on the following page) shows the solution, which was derived at by the
Identify the lines that define plane 1-2, 2-4, 4-3, and 3-1.
Project the individual points 1, 2, 3, and 4 into the right side view.
Draw in, with object lines, the lines that define the plane.