Modern Marvels - Season 12 - Eps 28: John Hancock Center
A steel giant standing 1,107 feet high on broad shoulders, this vertical city houses 1,200 people. Join us as we explore how a young architectural team from Skidmore, Owings & Merrill conceived of an innovative 100-story, multi-use tower. A construction crisis halted the project for six months, but once it resumed, it took just four years and 50 million man-hours to complete the John Hancock Center. In the heart of Chicago, the John Hancock Center rises 100 stories above the luxury shops and restaurants that line the famous Magnificent Mile. It opened on May 5, 1970 with 237,657 square feet of retailing, 812,160 square feet of offices, 703 rental apartments (converted to condominiums in 1974), 507-car parking garage, and an ice skating rink! There are 1,250 miles of wiring and 11,459 panes of glass. Nicknamed “Big John”, it cost $100-million and took 46,000 tons of steel to build.
About Modern Marvels

Title: Modern Marvels
First Air Date: 1993-12-10
Last Air Date: 2022-08-08
Status: Returning Series
Rating: 7.9/10 (from 27 votes)
Language: EN
Seasons: 23
Total Episodes: 705
Network: History H2
Genres: Documentary
Production Companies: Jupiter Entertainment, Six West Media
Synopsis
HISTORY’s longest-running series moves to H2. Modern Marvels celebrates the ingenuity, invention and imagination found in the world around us. From commonplace items like ink and coffee to architectural masterpieces and engineering disasters, the hit series goes beyond the basics to provide insight and history into things we wonder about and that impact our lives. This series tells fascinating stories of the doers, the dreamers and sometime-schemers that create everyday items, technological breakthroughs and manmade wonders. The hit series goes deep to explore the leading edge of human inspiration and ambition.