Next year, the American Institute of Architects plans to release “green” model contract forms designed to help limit legal exposure on sustainable projects. The forms are based on the institute's model agreements between owner and architect and between owner and contractor. They will incorporate concepts from AIA's free Guide for Sustainable Projects, published in the spring.AIA previewed the forms at the U.S. Green Building Council's (USGBC) Greenbuild International Conference and Expo, which drew 23,000 registrants to Toronto on Oct. 4-7. The objective of the agreements is to “make sure that roles and responsibilities are correctly defined” and to “allocate risk
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.