1. Isometric Pictorials Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Isometric Pictorials
Project Lead The Way, Inc.
Copyright 2007

2. Isometric Pictorials Isometric means equal measure.
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Isometric means equal measure.
Three adjacent faces on a cube will share a single point. The edges that converge at this point will appear as 120 degree angles or 30 degrees from the horizon line.
These three edges represent height, width, and depth. 12 11 1 10 2
1200 9 3
1200
1200 8 4 7 5 6
Demonstrate to the students that if they use quad rule graph paper, they can approximate the 120 degree angle by counting over two go up one.
Project Lead The Way, Inc.
Copyright 2007

3. Proportion and Estimation
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Good sketching requires a sense of proportion, and the ability to estimate size, distance, angles, and other spatial relationships.
Project Lead The Way, Inc.
Copyright 2007

4. The Box Method
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
The box method is a technique used in sketching to maintain proportionality. It starts with a sketcher envisioning an object contained within an imaginary box.
Note: You may have a different approach on teaching sketching. Teachers may prefer to use the board or an overhead when explaining the technique. You may have students follow along step by step on a sketch.
Project Lead The Way, Inc.
Copyright 2007

5. Isometric Sketching
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Step #1: Layout the box within which the isometric view will occur using points and construction lines.
Make sure the construction lines are light.
Project Lead The Way, Inc.
Copyright 2007

6. Step #1: Constructing The Box
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Finish by connecting the dots with light construction lines. Be sure to extend your lines past the corners
Connect the dots with light construction lines. Be sure to extend your lines past the corners
Locate corners of the maximum height and width of the box.
Locate the back corner of the top surface
Stress the importance of light construction lines when constructing the box and connecting the points.
To find the angle of the depth and width – count over two … up one…
Project Lead The Way, Inc.
Copyright 2007

7. Step #2: Outside Faces Using construction lines connect the dots
Isometric Pictorials
Step #2: Outside Faces
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Using construction lines connect the dots
Identify where the corners of the surface would touch the box.
Project Lead The Way, Inc.
Copyright 2007

8. Step #3: Rest of Object Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Project Lead The Way, Inc.
Copyright 2007

9. Steps in Drawing
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Step #1: Draw the Box appropriate to the type of drawing.
Step #2: Draw the surfaces that touch the Box.
Step #3: Draw the rest of the object.
Step #4: Tonal Shading, or Hidden and Center lines.
Project Lead The Way, Inc.
Copyright 2007

10. Step #1: Constructing The Box
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Determine the overall dimensions of the object:
6 units wide
4 units tall
4 units deep
Use points and construction lines to layout the box.
Again light construction lines.
Project Lead The Way, Inc.
Copyright 2007

11. Step #2: Outside Faces
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Use points and construction lines to identify the corners and edges of the object faces that occur on the surface of the box.
Project Lead The Way, Inc.
Copyright 2007

12. Step #2: Outside Faces cont.
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Before the sketch becomes too noisy with construction lines, trace out the visible edges identified thus far with object lines.
Project Lead The Way, Inc.
Copyright 2007

13. Step #3: Inside Faces
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Use points and construction lines to identify the corners and edges of the object faces that occur inside the box.
Project Lead The Way, Inc.
Copyright 2007

14. Step #3: Inside Faces cont.
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Trace out the remaining visible edges with object lines.
Project Lead The Way, Inc.
Copyright 2007

15. Step #4: Tonal Shading
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Decide where the light source is coming from, and add tonal shading to two of the three views with parallel lines drawn closely together. Increase the contrast by cross-hatching the lines on the darkest face.
Tonal shading is a technique that helps enhance the sketch.
Project Lead The Way, Inc.
Copyright 2007