JLG Industries Inc. will display a new 150-ft-tall boom lift at CONEXPO-CON/AGG 2011, the biggest construction event of the year, held on March 22-26 in Las Vegas. The lift replaces an older model that was cumbersome to deploy on jobs needing high-reach access. Photo: Courtesy of JLG Despite its 150-ft height, JLG’s newest lift can retract to a compact size for highway transport. Only a weight permit is needed. Photo: Courtesy of JLG Model 1500SJ is the tallest self-propelled aerial work platform that can be trailered without several permits, says JLG, which is taking orders for delivery around the time
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.