It was then secured to the steel piles with concrete.

At the time those were the longest steel piles ever used in a land-based building.

Some bending of the steel piles used in one of the caissons was seen on May 31.

Later, steel piles were used, but the developers had lost time and money.

The construction required the driving of around 250 steel piles; the first was driven on 10 August 1999.

To ensure the structure was stable, 13,500 steel piles were driven into the bedrock below.

These foundations included steel piles that were driven into the ground and capped with concrete.

The steel piles used were also transported using these cranes.

The steel piles are the structural supports that resist the tidal loads.

Five years later the area had been raised and reinforced with steel piles and concrete.