• Engineering 1182 College of Engineering Engineering Education Innovation Center Inclined Surfaces in Orthographic Projection Sections 11.02 -.03 of Text
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• Engineering 1182
College of Engineering
Engineering Education Innovation Center
Inclined Surfaces in Orthographic
Projection
Sections 11.02 -.03 of Text
• Engineering 1182
Objectives
• Understand how different types of
surfaces will appear in each viewing plane.
• Create orthographic projections of objects
with inclined surfaces.
• Engineering 1182
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.
• Engineering 1182
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.
• Engineering 1182
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
• Engineering 1182
Inclined Surfaces: An Alternative Method
The Miter Line
CLICK
Project Corner Edges,
Draw Lines.
45°
Draw MITER Line at 45°
Project Edges
• Engineering 1182
Recognizing Principal or Normal Surfaces,
Inclined Surfaces and Oblique Surfaces
A PRINCIPAL SURFACE APPEARS IN ITS TRUE SHAPE IN ONE VIEW AND AS A LINE IN THE OTHER TWO VIEWS WHERE IT IS
PERPENDICULAR TO THE OTHER TWO PRINCIPAL PLANES. .
AN INCLINE SURFACE APPEARS AS A LINE IN ONE VIEW AND IN ITS CHARACTERISTIC SHAPE IN THE OTHER TWO VIEWS WHERE IT IS
ANGLED WITH RESPECT TO THE OTHER TWO PRINCIPAL PLANES.
AN OBLIQUE SURFACE APPEARS IN IT’S CHARACTERISTIC SHAPE IN ALL THREE VIEWS WHERE IT IS ANGLED TO THE OTHER THREE
PRINCIPAL PLANES.
Principal Planes:
TOP, FRONT & RIGHT
• Engineering 1182
Inclined Surfaces in Orthographic Projections
• Use this time to practice making
orthographic projections from objects with
inclined surfaces.
• In class assignment
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