New Product Announcements: 05/13/2009 Tube-framing System: No Welds Needed The tube-framing clamp system allows for the framing of roof opening without welding. The lack of welds saves time and simplifies construction, and the clamps can be relocated and adjusted as needed with minimal disassembly. Each system has a distributed load capacity of 3,000 lb. End clamps slide over joists and under a roof deck, which allows for the framing to be installed with the roof deck already in place. Chicago Clamp Co.; 708-343-8311; www.chicagoclamp.com Water Heater: Storage Tank Prevents Scaling Armor Water Heaters are now available in three new models,
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.