6
Projections on Auxiliary Reference Planes
OBJECTIVES
After studying this chapter, you will be able to
Describe auxiliary reference planes and auxiliary views
Understand how points and lines are projected on auxiliary reference planes
Understand the relationship between principal and auxiliary views
Find the true length and inclinations of a line with the HP and the VP using auxiliary views
6.1 INTRODUCTION
The principal planes of projection, that is, the vertical, the horizontal and the profile planes are mutually perpendicular. The views projected on these principal planes, known as the principal views, are not sufficient to completely describe those objects that have a number of inclined surfaces in addition to the mutually perpendicular ...
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