Engineering Drawing, 2nd Edition

15

Auxiliary Views

OBJECTIVES

After reading this chapter, you will be able to

• Draw primary auxiliary views representing the true shapes of surfaces that are perpendicular to one of the reference planes and inclined to the other two
• Draw apparent shapes of surfaces in either the principal views or auxiliary views, if at least one of the views represents the true shape

15.1 INTRODUCTION

True shapes and sizes of all the surfaces of an object need to be known to manufacture it.

We have discussed earlier in Chapter 7 that a surface parallel to a plane of projection is projected with its true shape and size on that reference plane. But if a surface is inclined to the plane of projection, the projection on that reference plane does not show ...