Forth Bridge
a remarkable work in engineering, spanning the Firth of Forth in Scotland; completed and formally opened on March 4, 1890. The construction was begun early in 1883, and the total cost up to the time of completion may be given in round numbers as $16,000,000. Total length, upward of 1½ miles; cantilever arms projection (outer), 680 feet; depth of cantilevers 42 over piers, 342 feet; depth at ends, 41 feet; distance apart of lower members at piers, 120 feet; struts, largest diameter, 8 feet; ties, greatest length, 327 feet; central girder, span, 350 feet; central girder, depth at center, 51 feet; central girder, depth at ends, 41 feet; at end ends, 41 feet; total amount of steel in bridge, over of steel in bri bridge, over 50,000 tons, height of cantilever pier (masonry) above water, 209 feet. The designers of the bridge were Sir John Fowler and Benjamin Baker.