Designing a custom system to lift and set 2,200-ton and 2,600-ton offshore platforms is notable enough. But Belle Chasse, La.-based Versabar Inc. had to work with three different cultures across nine time zones and sail past real-life pirates to a site 8,500 miles away to make its most recent job successful—all within 10 months. Photo: Versabar Inc. Versatruss raises deck and carefully positions it over its jacket (above), then gently lowers it onto the jacket (below). Operators tested the procedure dockside before executing in 110 ft of open water. Versabar was hired by Al Khafji Joint Operations to use its
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.