At the site of the new Institute for Critical Technology and Applied Science building at Virginia Polytechnic and State University, students, faculty and visitors are asking questions about green construction. However, they are not inquiring about the 45,000-sq-ft academic building that will be seeking LEED Silver; they are asking about the colorful reMOD trailer next to it. Manufactured by Williams Scotsman Inc. and being used by project manager Skanska USA Building, the construction trailer features many design choices intended to reduce its environmental footprint. Construction trailers are not an obvious candidate for sustainable design. As the trailers are temporary by
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.