TABLE OF CONTENTS A body repair worker must have a good general knowledge of engineering drawing and surface developments in order to mark out replacement parts on sheet metal, as this requires accurate calculation of sizes and angles. While the majority of body workers who work in the repair side of the industry do not have to perform a lot of difficult marking out from elaborate drawings on to sheet metals for the making of the articles, those employed in the manufacturing side of the industry (e.g. coachworks) have to mark out all units and assemblies from drawings, whether for a one-off item or for 'mass' production. Consequently a thorough knowledge is essential of measurement and marking tools, and also of how to check these tools so that a standard of accuracy can be achieved and maintained throughout.
Blueprints, as working or production drawings are generally termed, are photographic reproductions of an original drawing. They take their name from the colour of the finished print when the drawing is reproduced on ferroprussiate paper. This paper produces copies of the drawing in white lines on a blue background. Several other types of coloured prints are also produced by industrial contact photo equipment, but in spite of their colour these are still generally known as blueprints. The practical body worker is rarely called upon to produce a finished drawing, but he will find it necessary in many cases to understand and work from both general and detailed drawings as set out by...
