FABRICATING AND ERECTING STRUCTURAL STEEL FOR INDUSTRIAL, COMMERCIAL AND HIGH RISE BUILDINGS AND HIGHWAY BRIDGES; GENERAL MACHINING OF METAL PARTS, EFFECTING MECHANICAL REPAIRS ON MECHANICAL MACHINERY AND EQUIPMENT; COMMERCIAL HEAT-TREATING METAL PARTS; STAMPING, WELDING AND/OR FABRICATING METALLIC SHEETS, PLATES OR CASTINGS AND/OR STRUCTURAL MEMBERS INTO INDIVIDUAL PARTS OR COMPLETED ASSEMBLIES ALL DONE TO THE ORDER AND/OR SPECIFICATION OF OTHERS