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College of EngineeringEngineering Education Innovation Center

Inclined Surfaces in Orthographic Projection

Sections 11.02 -.03 of Text

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Objectives

• Understand how different types of surfaces will appear in each viewing plane.

• Create orthographic projections of objects with inclined surfaces.

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Surface Types• So far, we have created orthographic projections

of objects made of only normal surfaces. • Now, we will look at inclined surfaces. • The table below list the basic characteristics of

each surface type and how each appears in orthographic projections.

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Inclined Surfaces

Edge view of inclined surface

• In orthographic projections, inclined surfaces are defined by the view in which they appear as an edge.

• Notice how it appears as a surface in the other two views.

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Inclined Surfaces: Example

CLICK

* Note that the size of the inclined surface changes in two views, but the shape does not.

* Note that the edges of the inclined surface project orthographically into the other two views

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Inclined Surfaces in Orthographic Projections

• Use this time to practice making orthographic projections from objects with inclined surfaces.

• In class assignment