Working drawings contain the information needed to make an object, including:
- assembly instructions
Working drawings normally use orthographic projection.
Some products may need a section drawing to give extra structural information, or an assembly drawing to show how parts fit together.
Orthographic projection uses a 2D drawing of each side of an object. Orthographic drawings usually consist of a front view, a side view and a plan view. A drawing board and parallel motionor T-square is used to project one view from another.
Orthographic drawing may be done using first angle projection or third angle projection.