Chapter 6 Orthogonal projection After studying this chapter and working on the problems you should be able to do the following: understand the principles of the first and third angle orthogonal projection produce a detailed orthogonal drawing of a component including all information necessary for its manufacture

Figure 6.1 – Orientation of rear view

Figure 6.2 –Third-angle projection

Figure 6.3 – Choosing number of views

Figure 6.4 – Relationship of orthogonal views

Figure 6.5 – Methods of projections between views

Figure 6.6 – First-angle projection

Figure 6.7

Figure 6.8 – Dimensions of working space

Figure 6.9 – Positioning of views

Figure 6.10 – Construction of views

Figure 6.11 – Complete view

Figure 6.12 – Principles of linear dimensioning

Figure 6.13 – Isometric view of a steel wall bracket

Figure 6.14 – Calculations for view positions

Figure 6.15 – Complete orthogonal projection