Download E-books America's Covered Bridges: Practical Crossings - Nostalgic Icons PDF

By Terry E. Miller, Ronald G. Knapp, A. Chester Ong

As many as 15,000 coated bridges have been in-built North the USA over the last 2 hundred years. Fewer than 1,000 remain.

In America's lined Bridges, authors Terry E. Miller and Ronald G. Knapp inform the attention-grabbing tale of those bridges, how they have been equipped, the technological breakthroughs required to build them and in particular the commitment and talent in their developers. each one wood bridge, no matter if nonetheless status or gone, has a narrative to inform concerning the nature of the US on the time—not in basic terms approximately its transportational wishes, however the availability of fabrics and the technological prowess of the folk who equipped it.

North American lined bridges have been marvels of engineering lengthy earlier than smooth civil engineering used to be invented. Early American bridge developers constructed innovative new carpentry ways to sign up for timbers into styles which include triangles or non-stop arches that ended in constructions inflexible adequate to span lengthy distances. known as trusses, those platforms have been serious to bridge development of the day and needed to be protected against the weather by means of a roof and siding. Few buyers discover that bridges have been lined to guard the trusses—not the folks utilizing the bridge! Unprotected, the trusses quickly degraded and the bridge may collapse.

Illustrated with a few 550 historic and modern photographs, work, and technical drawings of approximately four hundred diversified coated bridges, America's coated Bridges bargains 5 readable chapters at the background, layout and destiny of America's lined bridges, plus comparable bridges in Canada. lots of the modern images is via grasp photographer A. Chester Ong of Hong Kong.

55 photograph essays at the such a lot iconic bridges closing, including:

  • Cornish-Windsor Bridge among Vermont and New Hampshire
  • Porter-Parsonsfield Bridge, Maine
  • East Paden and West Paden (Twin Bridges), Pennsylvania
  • Philippi Bridge, West Virginia
  • Hortons Mill Bridge, Alabama
  • Medora Bridge, Indiana
  • Rock Mill Bridge, Ohio
  • Knight's Ferry Bridge, California
  • Perrault Bridge, Quebec, Canada
  • Hartland Bridge, New Brunswick, Canada

Among the featured bridges are that have been destroyed sooner than the e-book might be released, New York's Blenheim Bridge in the course of a typhoon and Ohio's Humpback Bridge by way of arson. The everlasting Bridge in Philadelphia, thought of by means of so much because the first lined bridge in the US, figures prominently, as do the bridges of Lancaster County—heart of Pennsylvania Dutch kingdom. This compendium of vintage Americana contains a few of the such a lot surprising and iconic bridges ever in-built the U.S., together with these through Timothy Palmer, Theodore Burr and Lewis Wernwag. a few, just like the Columbia-Wrightsville Bridge over the Susquehanna River in Pennsylvania, have been a mile long.

Over time, wood bridges finally gave approach to ones made from iron, metal and urban. An American icon, many lined bridges turned out of date and have been replaced—others easily decayed and collapsed. Many extra have been swept away by means of ordinary mess ups and fires. America's coated Bridges is basically jam-packed with interesting tales and knowledge passionately advised through best specialists in this topic. The e-book should be of great curiosity to somebody attracted to American heritage, carpentry and technological switch.

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Also, this specimen is just too calmly framed, and that most likely explains the makes an attempt to bolster it with an arch and pier, the latter of which destroys the symmetrical tension preparations. Haupt Truss Pennsylvania born Herman Haupt (1817–1905) lived an extended and really efficient lifestyles as certainly one of America’s greatest developers of railroads, tunnels, and bridges. Like his army successor in the course of the Civil warfare, Daniel C. McCallum, he was once probably the most influential and effective bridge developers of his time, yet his patented Haupt truss used to be little greater than an engineering footnote. at the present time, just one modest bridge survives together with his truss, and that used to be in-built the distant hills of North Carolina by way of an autonomous neighborhood builder whilst Haupt was once approximately 80 years previous and lengthy retired. a toddler prodigy, Haupt graduated from West element in 1835 whilst he was once purely fourteen and used to be instantly commissioned a moment Lieutenant, yet lower than 3 months later he resigned to develop into a civil engineer. quickly operating for a railroad corporation development bridges and tunnels, he additionally married at age nineteen and during his marriage had seven sons and 4 daughters. Haupt’s merely patent was once granted while he was once twenty-two. For seven years, from 1840 to 1847, Haupt then taught arithmetic and engineering at Pennsylvania university (now Gettysburg College), most probably the time whilst he all started writing his ground-breaking 1851 textbook, normal idea of Bridge building, a hugely technical research of stresses in bridge development with essays on specific bridges he knew. After leaving academia, Haupt back to construction railroads, bridges, and tunnels for numerous railroads. In 1862, on the top of the Civil conflict, Secretary of struggle Edwin M. Stanton appointed Haupt as leader of a newly created bureau whose cost was once developing and working army railroads, because the rails had turn into crucial in getting offers to the troops and bringing wounded infantrymen again for remedy. even supposing just a colonel, Haupt astounded even President Lincoln by means of rebuilding a brief constitution for the Potomac Creek Bridge in Virginia at the Richmond, Fredericksburg and Potomac Railroad, whose towering three-span deck bridge have been destroyed by way of backing out accomplice troops. This he did in just 9 days in may well, 1862, developing an easy deck supported by way of many of the maximum trestles ever equipped. The President famously remarked on seeing the constitution: “That guy Haupt has outfitted a bridge throughout Potomac Creek approximately four hundred toes lengthy and approximately a hundred ft excessive, over which loaded trains are passing each hour, and upon my note, gents there's not anything in it yet beanpoles and cornstalks! ” (Allen, 1959: 35–6). After 13 months, the span used to be changed with a extra massive arched lattice deck bridge (see web page 107). Seeing how profitable the accomplice military used to be in destroying wood bridges, Haupt copied the “Sesesh” (secessionists) and invented a small “torpedo” in past due 1862 in a position to bringing down huge trees bridges, this defined in chilling aspect in a guide he himself wrote (Allen 1959: 34–5).

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