The One IFC and South IFC Mall were completed in December 1998,
The IFCII will be completed in mid-2003,
The North IFC Mall in late 2002,
The Hotel and Suite Hotel in 2004.

Leslie E. Robertson Associates (New York)

Permasteelisa HK Ltd.

The IFCII 88-storey building is the third tallest building in the world with a height of 420m. The structure is made of concrete core, steel outriggers at three levels and large composite mega-columns. The tower was built with a 3 day-cycle floor construction.

The traditional construction techniques were not used (apart from complex details) mainly because of the issues of vertical transportation of material supplies and waste generation, as well as the issue of time. The cost for traditional foundation would have cost about 130-150/sqft and for formworks (superstructure) about 150/m2, compared with a reduction of approximately 50% of the actual cost using innovative techniques.

One IFC : 72,880 m2

The steel and concrete composite mega-columns were cast with a specially designed form system. The form was mounted with anchor bolts on to the lower part of the column. Hydraulic jacks inside the central post could lift the form when the concreting of the lower parts was completed.

Steel permanent formwork was used for the slabs saving time (hoisting and removing time) and reducing on-site waste generation. Once the permanent formwork and the reinforcement bars installed 1.25 mm thick concrete was poured (pumping system and robotics).

The stairs were fabricated in, and delivered to site by sea. The prefabrication techniques saved time, cost and ensured quality.

Permasteelisa is responsible for the design engineering, supply, fabrication, assembly and installation of the composite curtain wall system, glass walls and glass canopies, glazed entrances and revolving doors at the podium levels as well as the aluminum cladding on the roof fins at the top of the building.

The project includes:
70,000 m2 of curtain wall,
6,000 m2 of glass wall,
3,000 m2 of suspended glass canopies,
2,000 m2 of glass louvers,
5,000 m2 of aluminum cladding for roof fins.

The design of the façade is based on the concept of a “pilaster” unitized panel system where the units are prefabricated off-site and delivered to the site on pallets ready for installation. The unitized panel system comprises cast-in anchors, aluminum or steel fixing brackets, extruded aluminum framing, double glazed vision units or monolithic glazed spandrel units with GMS shadowbox, glass louvers, exterior mounted aluminum and stainless steel architectural tubes. For the typical tower, the majority of the panels on Level 6/7 to 88 are designed based on the vertical curtain wall system, hanging from floor to floor 4,170 high by approximately 1,610 wide for office floors and 4,850 by 1,610 for trading floors.

Waste Management