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Page:Popular Science Monthly Volume 89.djvu/744

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The Quebec Bridge has a span over the channel of eighteen hundred feet, which is ninety feet longer than the famous Firth of Forth Bridge, heretofore the longest span built. Near the main post, the bottom chord for each panel weighs 400 tons, making it necessary to split it into four pieces in order that it could be carried by railway to the site

To the left, a picture showing how the floor of the anchor arms was erected on tempo- rary staging. In order to man- ufacture the steel work an entirely new plant was built, equipped with machinery of unprecedented size and accu- racy, costing a million dollars

Below is shown the bottom chord of the cantilever arm. The men are standing at the pin-bearing for the main shoes. The diameter of the pin is forty-five inches. Each rib is eight inches thick


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