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美国芝加哥西尔斯大厦在第103层观望台增设了玻璃阳台。这些玻璃阳台从观望台向外延伸约1.2米。阳台的玻璃地板厚达12.7厘米,可承重约5吨。游客可以从
Sears Tower, Chicago, USA Added glass balconies to the observation deck on the 103rd floor. These glass balconies extend outward from the observation tower for about 1.2 meters. The glass floor of the balcony is as thick as 12.7 cm and can support about 5 tons. Tourists can from