New product announcements: 04/08/2009 Fall Protection: Modular Weight System Allows For Easy Relocation The Weightanka is a modular deadweight fall-protection system. The non-penetrating system is designed for roofs with less than a five-degree pitch where installation of temporary guardrails or permanent anchors is not an option. Attachments are made to a central pedestal, with the basic system weighing 550 lb. The system can be disassembled into components weighing less than 55 lb for easy relocation. Kee Safety, Inc.; 800-851-5181; www.keesafety.com Curb Machine: Tighter Turns The Power Curber 5700-C is the latest update to the 5700 series of curb machines. It is
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.