Sheet Metal Workers Pocket ManualThe newly designed Sheet Metal Pocket Manual is a reference book dealing with tables, problems and solutions, and practical on the job methods: designed for use by the journeyman while in the field or in the shop; made to be carried in the tool box or in the pocket as a practical data book in general sheet metal work. Specific contents cover perimeters, circumferences, areas, volumes, transitions, offsets, allowances, ducts, gutters, belts and