In addition MAC has been responsible for the turnkey design and construction of complex concrete structures such as bridges and multi-storey buildings. The scope of the work achieved was multi- disciplinary and wide-ranging. It included heavy civil construction such as the pouring of 1,300 cubic metres in a single pour for concrete foundations; slip-forming for large cement silos; the lifting and installation of heavy vessels weighing up to 600 tons; the installation of oil tanks and tank farms; the fabrication and installation of piping ranging in diameter from 2 inches to 72 inches; the erection of heavy steel structures up to 50 metres in height; the lifting of 80-ton boiler drums to a height of 48 metres the installation and alignment of rotating equipment, some with a capacity as large as 20,000 HI- Additional involvement included state-of-the-art field welding of alloy piping of up to 21/2 inch wall thickness as well as stress relieving and non-destructive testing; electrical and instrumentation works; sandblasting and painting of various types of structures and equipment; installation of piping and vessels; commissioning of equipment; and start-up and training of client personnel. The company is proud of its outstanding record in successful tight deadlines and in demanding site conditions.