1. Foundations of Technology Sketching and Technical Drawing
STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Foundations of Technology Sketching and Technical Drawing
TITLE SLIDE
Teacher Resource – Unit 2 Lesson 5
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

2. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
The BIG Idea
Big Idea:
At various intervals of the Engineering Design Process, conceptual, mathematical, and physical models are used to evaluate the design solution.
[Authors: Please include teacher notes appropriately.]
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

3. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Annotated Sketches
Annotated Sketches are sketches that include notes or labels, dimensions, and/or symbols.
Sketches are often used to show an idea or visibly capture a thought.
All sketches should include some type of annotation.
[Authors: Please include teacher notes appropriately.]
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

4. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Annotated Sketches
Sketching takes practice, but there are some basics to remember:
Use long, light, and flowing lines rather than heavy or short lines.
Sketches are a loose representation of the idea; accuracy is not critical.
Keep your sketches quick; include enough detail to get your idea across.
Use basic shapes to frame the sketch, then add more detail.
[Authors: Please include teacher notes appropriately.]
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

5. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Technical drawing is a visual communication language that is used to communicate how something works or is constructed.
All technical drawings include:
Standard symbols
Units of measurement
[Authors: Please include teacher notes appropriately.]
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

6. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Technical Drawings can be produced using paper and pencil or on a computer using computer-aided design (CAD).
We will use two basics types of technical drawings:
Orthographic projection
Isometric projection
[Authors: Please include teacher notes appropriately.]
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

7. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Orthographic projection is a way to represent a three- dimensional object in two dimensions.
Typically, two or more elevations or pictures are produced to represent the entire object—known as multiview projection.
[Authors: Please include teacher notes appropriately.]
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

8. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Orthographic projection typically displays the top, front, and ride side views of a three-dimensional object.
Multiview Projection
Top (yellow)
Top
Right
Side (green)
Right
Side
[Authors: Please include teacher notes appropriately.]
Front
Front (grey)
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

9. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Orthographic multiview projection has some basic terminology:
Top Elevation
Construction Lines (light)
Hidden Lines (dashed)
Part Outline
(solid)
[Authors: Please include teacher notes appropriately.]
Dimensions
(singular or stacked)
Front Elevation
Side Elevation
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

10. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Drawing orthographically will take practice, but there are some basics to remember:
Use construction lines to frame out the work space.
The distance between elevations are equal.
Use construction lines to project details between the elevations.
Construction Lines
Top
[Authors: Please include teacher notes appropriately.]
Side
Front
Equal
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

11. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Drawing orthographically will take practice, but there are some basics to remember:
A 45°-angle line can be drawn to help project between the top and side elevation.
Darken the lines that represent the part.
Do not erase construction lines.
45° Construction Line
Top
Finished Lines (darkened)
Side
[Authors: Please include teacher notes appropriately.]
Front
Construction Lines (light)
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

12. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Orthographic Drawing Practice 2 5 4
Depth = 4
Top
Height = 5
6. Project points of interest using Construction Lines
1. Establish an Origin (staring point)
2. Frame out the work space with Construction Lines – total height, width and depth, leaving equal space between objects
7. Darken all finished lines for each view
4. Add a 45° line starting in the upper right hand corner – used to project details between the top and side views
3. Project the outline of the top, front and side views using Construction Lines
5. Add points of interest to the most descriptive view
[Authors: Please include teacher notes appropriately.]
Side
Front
Width = 4
Depth = 4
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

13. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Isometric projection is a simple way to show a three-dimensional object.
By using isometric projection, three sides of an object are shown proportionally.
All vertical lines are drawn vertically, and all horizontal lines are drawn at an angle of 30° degrees.
[Authors: Please include teacher notes appropriately.]
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

14. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Drawing isometrically will take practice, but there are some basics to remember:
Use construction lines to frame out the work space.
Use construction lines to project details on surfaces.
Use accurate measurements on all surfaces.
[Authors: Please include teacher notes appropriately.]
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc

15. STEMCenter for Teaching & Learning™ Engineering byDesign™
12/01/2009
Technical Drawings
Isometric Drawing Practice 2 5 4
Height = 5
6. Darken all finished lines
1. Establish and origin (starting point)
2. Frame out the work space with Construction Lines – total height, width and depth
5. Additional points of interest can now be identified – project those points using Construction Lines
3. Add points of interest to the most descriptive view(s)
4. Project points of interest using Construction Lines
[Authors: Please include teacher notes appropriately.]
Depth= 4
Width= 4
© 2013 International Technology and Engineering Educators Association
STEMCenter for Teaching and Learning™
Foundations of Technology
© International Technology Education Assoc