TransAm12sec
07-02-2009, 01:25 PM
Sears Tower unveils 103rd floor glass balconies.
http://www.suntimes.com/business/1648975,CST-NWS-sears02.article
http://news.yahoo.com/s/ap_travel/us_sears_tower_ledge
"One process involved a center punch, a device somewhat larger than a pen but which packs a pressurized wallop. Cerny said that through the center punch test, it was determined the boxes' three half-inch-thick panels could be fractured and they would still hold. The official load limit is five tons."
"Cerny said all the Skydeck work, including lobby renovations, cost more than $8 million."
http://www.suntimes.com/business/1648975,CST-NWS-sears02.article
http://news.yahoo.com/s/ap_travel/us_sears_tower_ledge
"One process involved a center punch, a device somewhat larger than a pen but which packs a pressurized wallop. Cerny said that through the center punch test, it was determined the boxes' three half-inch-thick panels could be fractured and they would still hold. The official load limit is five tons."
"Cerny said all the Skydeck work, including lobby renovations, cost more than $8 million."