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Scientific American, Vol. 71, No. 23 (1894) (1894)
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is modern de- enough to extend across the top of the pier, which is covered by them laid close together. Transversely to velopment, without the use of steel, the walls of these buildings would have to be so thick at the lower story these, five 20 inch I beams, weighing 64 pounds to the that there… … The building is 303 feet high from the street to the The American Surety Building. THE STEEL FOUNDATIONS OF TALL OFFICE BUILDINGS. © 1894 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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