Grand Canyon Skywalk
The Grand Canyon Skywalk is the highest man-made structure in the world, built with more than one million pounds of steel. It is designed to withstand an 8.0 magnitude earthquake 50 miles away.
The main horseshoe shaped skywalk was formed from two box girders of A572-50 carbon steel with the space between them spanned by two layers of plexiglass that allow for spectacular between the feet views. The girder sections are 2 inches thick, 6 feet long and 2.5 feet wide that had to be shipped in 40 foot sections and assembled on site.
It is equipped with three oscillating steel plates, each 3,200 pounds, inside the hollow bridge beams that act as shock absorbers. Set atop the box girders, the walkway itself is constructed of three-inch thick, heat-strengthened glass.
Tourists who are courageous enough to walk the Grand Canyon Skywalk will enjoy incredible views and can appreciate the remarkable engineering. But for those too timid to venture out past the tourist center, it is an attraction easily appreciated from afar.