Multiview drawings are an important part of engineering and technical graphics. To create multiview drawings takes a high degree of visualization skill and much practice. Multiview drawings are created by closely following orthographic projection techniques and ANSI standards. Auxiliary views are a type of orthographic projection used to determine the true size and shape of inclined and oblique surfaces of objects. Normally, auxiliary views are projected from existing principal views. However, auxiliary views can also be drawn first and then used to create a principal view. This is done when a true measurement can only be obtained by an auxiliary view and that measurement is needed in order to create a principal view. This technique is called reverse construction. Any number of auxiliary views of an object can be created. Successive auxiliary views can be created by projecting from an existing auxiliary view. | 
2002 McGraw-Hill Higher Education