Business Center 2 ОАО "Сургутнефтегаз" in Surgut, Russia, has an area of 35.000 m2. The building was constructed in 2004. Floor slabs are monolithic, pre-stressed, produced in a package and thereafter lifted to the designed position by method of large-scale elements erection. The grid of the structure is 7.2 x 7.2m.