An investigation has been launched into why 1,000 sq m of roof was blown off Indira Gandhi International Airport’s six-month-old domestic terminal during a storm on Aug. 21 that had winds of over 90 kilometers per hour lasting 10 minutes. The section comprised about 5% of the 20,000 sq m high-tensile steel roof on the $100-million terminal. Photo: Manoj Kumar Investigators want to find out why new terminal roof section succumbed to wind. Delhi International Airport Ltd. (DIAL), the concessionaire that holds a contract to develop, manage and operate the airport, has formed a team to look into whether there
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.