1. Sketching Multiview Drawings

2. Multiview Drawing
A multiview drawing is one that shows two or more two-dimensional views of a three-dimensional object.
They provide the shape description of an object.
When dimensioned, multiview drawings serve as a main form of communication between designers and manufacturers.

3. Multiview Drawing

4. Width, Depth, and Height All three-dimensional objects have:
width, height, and depth.
Width is associated is side-to-side
Height is top-to-bottom.
Depth is front-to-back.

5. Width, Depth, and Height

6. Sketching Multiview Drawings
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Width, Depth, and Height
Height
Depth
Width
Front View
Top View/Plan
Right Side View
Project Lead The Way, Inc.
Copyright 2007

7. Orthographic Projection
Orthographic projection is a technique that is used to create multiview drawings.

8. Orthographic Projection
The orthographic projection is to imagine an object contained inside a glass box.

9. Projection Plane
There are six glass walls surrounding the object. Each wall represents a projection plane.
The projection plane is the surface onto which a two-dimensional view of a three-dimensional object is projected and created.

10. Orthographic Projection
Start by focusing only on the front projection plane.
Standing in front of the object you would see only the five corners identified in black. 3 4

11. Orthographic Projection
Lay out the over all size of the Top, Front, and Right Side views
Projection Line
(45o line) 3 4

12. Orthographic Projection
Draw in the major features from each view

13. Orthographic Projection
Project features from one view to another

14. Orthographic Projection
Add final features

15. Orthographic Projection

16. Sketching a Multiview Drawing
Step #1: Draw the Orthographic Box
Step #2: Draw the surfaces that touch the box
Step #3: Draw the rest of the surfaces
Step #4: Add hidden and center lines (no tonal shading)

17. Step #1 Draw the Orthographic Box
Calculate the amount of space that the views will take up based on W H D.
Vertically D 3 H
Horizontally W 3 D
Layout the boxes within which the individual views will occur using points and construction lines.

18. Step #1 Draw the Orthographic Box

19. Sketching Multiview Drawings
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Step #2 Surfaces that Touch the Box
From every end of every line, draw construction lines to the other two views, using the projection line between top and right
Project Lead The Way, Inc.
Copyright 2007

20. Step #3 Draw the Rest

21. Sketching a Multiview Drawing
Step #1: Draw the Orthographic Box
Step #2: Draw the surfaces that touch the box
Step #3: Draw the rest of the surfaces
Step #4: Add hidden and center lines (no tonal shading)

22. Sketching Multiview Drawings
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
A Question…
Each of the blocks at right has the same overall dimensions and color. What else do they have in common?
Project Lead The Way, Inc.
Copyright 2007

23. They all have identical top views!
The Answer…
Each of the blocks at right has the same overall dimensions and color. What else do they have in common?
They all have identical top views!