1. Introduction to Engineering Section Views - 1 Agenda Why section views are needed Types of section views Reference Bertoline, Chapter 3, Sections 3.1-3.4

2. Section views are used when important hidden details are in the interior of an object. These details appear as hidden lines in one of the orthographic principal views; therefore, their shapes are not very well described by pure orthographic projection. Section Views

3. Types Of Section Views Full sections Half sections Offset sections Broken-out sections Revolved sections Removed sections

4. Cutting Plane Section views show how an object would look if a cutting plane (or saw) cut through the object and the material in front of the cutting plane is removed Figure 3.3

5. Section Lines Section lines (crosshatching) are used to show where the cutting plane passed through solid material Figure 3.9

6. Section Lines Section lines can be used to show different types of materials or different parts of the same material. Refer to text for a complete list (Figure 3.8)

7. Full Section View In a full section view, the cutting plane cuts across the entire object Note that hidden lines become visible in a section view

8. Full Section View Show cutting plane in the top view Make a full section on the front view

9. Full Section View Note how the cutting plane is drawn and how the crosshatching lines mark the surfaces of material cut by the cutting plane. No hidden lines on the section view, if possible. Note: Interior lines behind cutting plane became visible.

10. Half Section View The cutting planes do not cut all the way through to the object. They cut only half way, stopping at the centerline.

11. Half Section View Half Section used mainly for symmetric objects

12. Video #17 Drawing Full and Half Sections

13. Assignment #32: Full & Half Sections Handout Read Bertoline, Chapter #3, Sections 3.1- 3.4 Assignment #32 (Start in Class)  Follow the instructions to make full and half section views on the handout provided.  On a piece of isometric grid paper, draw an isometric view of a full section of the object in Assignment #32.