A Bridge Nine and a Half Miles Long.

Kaipara and Waitemata Echo, 23 October 1914, Page 2

A Bridge Nine and a Half Miles Long.

Should the plans of the San Francisco supervisory be carried into execution;,: the lo.ngest bridge in the wjorld. wilt be/built to sj)an the ..bay separating "San Francisco and Oakland, .: The plans call for a bridge nine and one-half miles long, supported; by ten piers, placed 2,230 feet apart. The elevation above the waters of the bay will be about one hundred and eighty feet. It will be '■' a three-decked structure, and capable qf accommodating twentyfour railroad tracks besides automobile ways and foot-walks. The suspension will-be on ten steel cables, twenty inches in diameter, with a tensile strength of thirty-five thousand tons, and cut through the top of the piers, .and so planned that, should the bridge sway with the winds, its decks would be kept parallel with the earth's surface. The piers are to rest on steel caissons 320 feet long, 225 feet wide, and 150 feet in height, with a weight of 80,000 tons, and a buoyancy of 110,000 tons. It will be the most massive and long-cat bridge of its kind in the world.