New product announcements: 05/05/2010 Wheel Loader: Load-Sensing Hydraulics The Hyundai HL770-9 Wheel Loader now features a load-sensing hydraulic system with a variable volume pump. Other improvements over previous models include a fully automatic power-shift transmission with variable shift control, multistage clutch cut-off and an integrated payload system. A larger cab boasts improved visibility and optional joystick seating. It has a 5.5-cu-yd bucket and an integrated rear-view backup camera. The GPS-enabled HI-Mate system allows fleet operators to track fuel efficiency and diagnostics through a Web-based interface. Hyundai Construction Equipment Americas Inc.; 847-437-3333; www.hyundaiamericas.com Fire-Stop Collar: Meets Multiple Fire-Safety Ratings The SpecSeal
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.