World's tallest building

• At 181 stories, 553.33m 1,815 ft., 5 in. it is the world's tallest building and free-standing structure
• Height of: § Glass Floor - 113 stories - 1,122ft. § Look Out Level - 114 stories- 1,136ft. § Sky Pod - 147 stories-1,465ft.
• The CN Tower was built by the Canadian National Railway.
• Opened to the public on June 26, 1976
• Official opening on October 1, 1976
• Original cost: $63 million
• Total weight of the Tower: 130,000 tons
• Attendance: about 2 million per year
• Glass Floor was opened on June 26, 1994
• Thickness of The Glass Floor: 2 1/2 ". Layers, from the top down: § 3/16" scuff plate (replaced annually) § Two 1/2" layers of clear tempered glass, laminated together. A one inch layer of air (for insulation). Two 1/4" layers of clear tempered glass, laminated together. Size of each panel: 42" by 50". Load tests are performed annually on each panel to ensure safety.

I’ve been there and the glass floor is really cool.