A reference to augment the practical knowledge of welders and fabricators with some scientific background on the nature of the materials and processes they work with on a daily basis. Considers the composition of steel and the changes it undergoes during welding and fabrication, forming and preparing the steel, correct ways of joining, the weight of structural shapes and the loads they can safely bear, worker safety, and common mistakes. Highly illustrated. Annotation c. by Book News, Inc., Portland, Or.