El primer rascacielos de acero reforzado, el Ingalls Building, en Cincinnati, Ohio

emailed handout photo for LOCAL_OUR HISTORY – SAVED NOVEMBER 5, 2012: PHOTO CREDIT: CINCINNATIVIEWS/DON PROUT
Upon its completion in the summer of 1903, many thought the Ingalls Building, rising to 15 stories, would collapse under its own weight. photo credit: Cincinnativiews/Don Prout