New product announcements: 09/16/2009 All-Terrain Crane: Low Cab for a Closer View The CD4430 is a 30-ton, cab-down, rough-terrain crane intended for work in railroads, bridge construction and refineries. The crane’s low profile increases stability and improves handling in rough environments. It features a six-sided boom and is powered by a Tier 3 Cummins engine. An optional Hi-Rail gear system can be integrated into the crane for use in rail construction. Standard features include a two-door high-visibility cab, all-wheel drive and crab steering. Badger Equipment; 800-533-8013; www.badgerequipment.com Laser Measurements: Rugged Handheld Design The DW030 laser-based distance measure allows for the quick
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.