The famous observation decks of 20th-century buildings—the Empire State Building, Rockefeller Center, the World Trade Center—were low-tech but thrilling open-air platforms ringed by coin-operated ...

Researchers in Canada have proposed using gravity-based energy storage in high-rise buildings, in combination with photovoltaic facades, small wind turbines, and lithium-ion batteries. Their modeling ...

A Gothamist review of city-approved plans show that columns below a major expansion of the existing structure were to be reinforced.

Engineer Christopher Behan said reinforcing steel was never installed, despite plans that explicitly called for it.