The Occupational Safety and Health Administration now has four crane-operator certification programs it formally recognizes, following an agreement with the National Center for Construction Education and Research, Gainesville, Fla. A signing ceremony for the OSHA-NCCER agreement was held on May 17. In March, OSHA finalized a similar agreement with The Crane Institute of America Certification Inc. OSHA’s first such crane-operator program agreement came in 1999, with the National Commission for the Certification of Crane Operators. The agency also signed an agreement in 2008 with the Operating Engineers Certification Program. Crane safety has become a priority for OSHA, the construction industry
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.