The reconstituted committee charged with developing the nation’s first green building standard met for the first time on Jan. 27 in Chicago at the winter meeting of the standard’s lead developer, the American Society of Heating, Refrigerating and Air Conditioning Engineers Inc. The two-year-old committee stopped work in the fall after ASHRAE decided the panel needed broader industry representation. The new Standard 189 committee has 34 voting members, up from 21. The committee includes more representation from owners, the steel sector and construction, said Kent Peterson, chief engineer of P2S Engineering, Long Beach, Calif., and the panel’s new chair. Panel
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.