Bashni Petronas Kuala-Lumpur, Malaysia

Petronas Towers is an 88-storey skyscraper over 450 meters high. The building was built in the Islamic style, and its shape was personally proposed by the Prime Minister of Malaysia. Construction took 6 years (1992-1998). In the towers there are offices, exhibition and conference rooms, an art gallery.
The construction of Petronas Towers cost the main customer - the state oil corporation Petronas - $ 800 million. Some of the costs were borne by other Malaysian firms, who distributed office space between the two skyscrapers. The towers are connected by a covered passage in the form of a bridge, which provides fire safety of the building. Washing the windows of a single tower takes a month. Up to 10,000 people live and work in the towers.

The basis of the design is not light steel, too expensive for Malaysia, but special elastic concrete, comparable in strength to steel. Because of this, the skyscraper turned out to be twice as heavy as similar steel. Thanks to the design, the towers can withstand the loss of three of the sixteen columns. Additional security is given by an air bridge installed on giant ball supports, since the towers sway and the bridge cannot be rigidly fixed.