Suspension bridge major wire-cable suspension bridge was the in Philadelphia, Pennsylvania. Designed by Charles Ellet, Jr. and completed in 1842, it had a span of 109 m. Ellet's Niagara Falls Suspension Bridge (1847–48) was abandoned before completion. It was used as scaffolding for John A. Roebling's double decker railroad and carriage bridge (1855). The Otto Beit Bridge (1938–39) was the first modern suspension bridge outside the United States built with parallel wire cables. The main forces in a suspension bridge of any type are tension in the cables and compression in the pillars. Since almost all the force on the pillars is
American Cable and Radio Corporation American Cable and Radio Corporation American Cable and Radio Corporation was a communications holding company in the middle 20th century. Created in February 1940, it was a part of ITT World Communications, and operated what was known as the American Cable and Radio System, comprising All America Cables and Radio, the Commercial Cable Company, Mackay Radio, and the Sociedad Anonima Radio Argentina. The company was created, along with the All America Corporation and the Commercial Mackay Corporation, after the reorganization of the ITT subsidiary Postal Telegraph and Cable Corporation, which had gone into bankruptcy in 1935. The firm was active