Visitors step out onto the new U-shaped Grand Canyon West Skywalk in Arizona. The 2-inch-thick observatory platform, suspended 4,000 feet above the Colorado River, consists of four layers of glass with three structural interlayers of DuPont Building Innovations' SentryGlas Plus sandwiched in between. The glass was supplied by Paris-based Cie. de Saint-Gobain. The skywalk is able to withstand winds up to 100 mph and holds 120 people. Visitors are provided with shoe covers to protect them from slipping and to prevent scratching of the glass floor.
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