Faster, stronger and greener elements need to be part of bridge construction in the U.S., accomplished through fast-track project-delivery methods, Accelerated Bridge Construction techniques or alternative materials, according to a variety of industry officials. Fiber-reinforced polymers (FRPs) could contribute to all those themes, said speakers at the International Bridge Conference held in Pittsburgh on June 14-17. “The ABC mantra is ‘Get in, get out and stay out,’” noted David White, marketing manager with Sika Corp., Lyndhurst, N.J., a manufacturer of FRP components. “FRPs will fit all of that, especially the ‘stay out.’” But the higher initial cost of installing composite
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.