Orthographic Projection Multi View Drawing Orthographic Projection Is

Orthographic Projection Multi View Drawing

Orthographic Projection • Is a drawing technique that accurately shows the size and shape of a 3 dimensional object on a 2 dimensional paper surface.

Here is How it Works

Objects Have 6 Surfaces – Front – Back – Top – Bottom – Right Side – Left Side

Three Principle Views – Front – Top – Side • Why only 3 views?

Drawing all 6 Sides is a Waste of Time What do you notice about these 6 views?

View Orientation 45 o Angle Projection Line Top View Front View R. Side View

LET’S CHOOSE AN OBJECT • AIRPLANE

Front View • View that shows the greatest Detail • Shows – Width – Height

Top View • Directly Above the Front View • Shows: – Width – Depth

Right Side View • Directly To the Right of the Front View • Shows: – Depth – Height

Important Points • Align all Views • Draw Projection Lines (Very Light) • Use 45 o Projection Line • Darken Object Lines

Color the corresponding sides on your work sheet.

How do I Visualize the Object? Lets Try it Out!

Try to Orthographically Sketch These Items • Over. Head Projector • Clock

Try This! 2 -1/4 1 -1/2 1 1

References • http: //www. tpub. com/content/draftsman/14 040/css/14040_41. htm • http: //www. ider. herts. ac. uk/school/coursew are/graphics/index. html