Orthographic Projections:

As you learned previously about the theory of projection of points, planes and lines, the next significant is the projection of solids that have three dimensions: length, thickness and breadth.

During engineering practice, we often come across along with solids bounded with simple or complex geometric surface. Here to represent a solid in orthographic projection, this will depend upon the variety of solid and its orientation along with respect to the principal planes of projection.

Objectives

Once studying this unit, you should be capable to

• understand various types of solids commonly employed in engineering drawings,
• sketch orthographic projections of different solids in easy position as like while their axis is inclined to reference planes,
• sketch orthographic projections of different solids when a portion of the solid is cut with a section plane, and
• Sketch auxiliary views of solids on other planes recognized as auxiliary planes.