Leaders of the Construction Users Roundtable say they want to push designers and contractors to use more sophisticated methods of prefabrication and modular construction techniques to cut the time and cost of construction and to complete projects more safely with fewer workers. Image: Cianbro Cianbro manufacturing facility in Maine, pictured in earlier rendering, manufactured component modules for a Texas refinery. The comments were made at CURT's spring meeting April 12-13 in Covington, Ky., outside Cincinnati. While the use of prefabrication techniques has accelerated in the last five years—companies such as Jacobs Engineering, The Shaw Group Inc. and Cianbro are making
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.