Multiview Projection

Basics of Projections Orthographic drawings are the result of projecting the image of

a three-dimensional object onto one of six standard planes of projection. The planes of projection intersect each other at fold lines. The six standard planes of projection are often thought of as a "glass box."

Each view in an orthographic projection is aligned with an adjacent view. The principal views most often used are top, front, and right side.

Projection of an Object

Top & Right Side View

Unfolding a Glass Box

Partial Views

Revolution Conventions

Revolution Conventions

Visualizing from given views

To help project or verify surfaces you can label them with letters, and the corners of surfaces can be labeled with numbers. There are normal, inclined, and oblique surfaces. Normal surfaces appear true size in one principal view and as an edge in the other two principal views. Inclined surfaces appear as an edge view in one of the three principal views. Oblique surfaces do not appear in edge view in any of the principal views.

Projections of Surfaces

Projections of Lines

Representation of holes

Representation of holes