LAYOUT AND FABRICATION OF SHEETMETAL （布局和钣金件的制造）.pdf

CHAPTER 2 LAYOUT AND FABRICATION OF SHEET-METAL AND FIBER-GLASS DUCT As a Steelworker you are required to operate If you require information on blueprints, you will find sheet-metal tools and to apply basic sheet-metal layout chapters 1-3 and 8 of Blueprint Reading and techniques. In many Naval Construction Force (NCF) Sketching, NAVEDTRA 10077-F1, an excellent projects, sheet metal is used to protect the exterior of reference. buildings by using flashing, gutters, and at times, Layout tools are used for laying out fabrication complete sheet-metal roofing systems. Other items jobs on metal. Some of the more common layout tools made from sheet metal are dust collection systems, that you will use in performing layout duties are as machinery guards, lockers, and shelving. follows: scriber, flat steel square, combination square, Although many of the parts and fittings used in protractor, prick punch, dividers, trammel points, and sheet-metal work are stock items, which are simply circumference rule. installed or assembled, Steelworkers are required to fabricate parts and fittings frequently in the shop or to Scriber modify them to fit irregularities in the project design. Therefore, you must have knowledge not only in Lines are scribed on sheet