New product announcements: 04/01/2009 45-Tonne City Mobile Crane: Compact Size Manitowoc Cranes is launching a new mobile crane under its Grove brand that is designed especially for use on tight urban jobsites. The GCK3045 has a 45-tonne capacity with a 34-meter boom and optional 6.3-m twist jib. The crane is 9.07 m long and 3 m high and offers a choice of five outrigger locations. It has a three-axle configuration with electronic rear-wheel steering to minimize tire wear and has a boom-down design. Manitowoc Cranes; 920-684-6621; www.manitowoc.com Advanced Insulation For Pipe: Small Diameter The new Aquatherm Advanced pipe-wrap insulation, when used
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.