ENGN103 Engineering Drawing

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Presentation transcript:

ENGN103 Engineering Drawing Lecture 5

What is Orthographic Projection? Orthographic Projection is a method of representing a three dimensional object on paper using several two dimensional views. It is the international language of Engineers and Designers

Orthographic Projection? Front elevation Side elevation Plan – Top view Isometric view

Side elevation Front elevation Plan – Top view

Height Height Depth Width Width Height Depth Depth Width FRONT ELEVATION SIDE ELEVATION Height Width Depth Depth Width PLAN

FRONT ELEVATION SIDE ELEVATION

FRONT ELEVATION SIDE ELEVATION PLAN

Precedence of Lines

Transferring Depth Dimensions The depth dimensions in the top and side views must correspond You may find it convenient to use dividers, a scale, or a 45-degree miter line to project dimensions

45-degree miter line to project dimensions

FRONT ELEVATION SIDE ELEVATION PLAN

FRONT ELEVATION SIDE ELEVATION PLAN

FRONT ELEVATION SIDE ELEVATION PLAN

Centerlines

Precedence of Lines FRONT ELEVATION SIDE ELEVATION PLAN

FRONT ELEVATION SIDE ELEVATION PLAN