Products 03/02/2011 Concrete-Placing Boom: Long Reach The MX 43/47Z-Meter Placing Boom has a 138-ft, one-inch reach and does not require a counterweight. The extended reach allows for concrete placement on high-rise buildings, bridges, dams and other specialty applications. The boom features more straight pipe runs than earlier models for less stressful concrete runs and longer wear on parts. The MX 43/47Z can operate with either a diesel or electric power pack. Putzmeister America; 800-884-7210; www.putzmeisteramerica.com Concrete-Form Release Agent: Curing in the Cold Pro-Release is a concrete-form release agent that is formulated to work with newer concrete-mix designs, including those that
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.