History of Bridge Engineering

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The author, 1911 - Bridges - 479 pages
 

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Page 24 - And trims his helmet's plume ; When the goodwife's shuttle merrily Goes flashing through the loom ; With weeping and with laughter Still is the story told, How well Horatius kept the bridge In the brave days of old.
Page 217 - Straits was also designed as a suspension with solid web stiffening girders, instead of open trusses, but as the girders were found to be strong enough in themselves, the cables were omitted. The Niagara bridge had a span of 825 feet with two decks, the lower one carrying a highway 15 feet wide, partially enclosed at the side by the timber stiffening trusses. The upper deck, 24 feet wide and 245 feet above high water, had a single track in the center and was floored over, separating it from the road...
Page 217 - There were four cables 10*4 inch diameter, containing 520 wires in each or a total of 3,640, the wires of Mr. Ellet's old foot bridge being incorporated with the others. The masonry towers were 60 feet high above the road, 15 feet square at the base, and 8 feet square at the top, and the bridge was braced laterally against wind pressure by 56 wire guy ropes, IJ^-inch diameter, fastened to rocks below, the guys detracting considerably from its appearance.
Page 16 - The Caravan Bridge over the River Meles at Smyrna in Asia Minor, is believed by archeologists to be one of the very oldest in existence.
Page 217 - One of the first to propose open web, deep stiffening trusses braced together transversely for suspension bridges was John C. Trautwine, who in 1851 designed a bridge to cross the Delaware river at Market Street, Philadelphia, with four river spans of 1,000 feet each, and two end spans of 500 feet, using wire cables, and trusses 20 feet deep.
Page 362 - The new metal structure which took its place is shown on page 21, and is an interesting example of the American method of metal viaduct construction, an essential feature of that construction being the concentration of the material into the least possible number of parts. This bridge has ten spans of 50 feet, two of 100 feet, and one of 118 feet.
Page 210 - October, 1852, and counter cables were added in its restoration. The end cables are not loaded and have the same angle of inclination at each side of the towers, being made continuous around the anchorages in the end vaults, similar to the Lorient bridge.
Page 206 - The side trusses were entirely too light for engine loads, and after being in use for some time, the deflection was so great that piles were driven under the platform to support it, and in 1841 nothing remained except the chains.

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