Railroad Bridge

Railroad Bridge

 

a structure that carries a railroad line across some obstacle (such as a watercourse or ravine). Rail-road bridges are subjected to intensive dynamic effects: great demands are made on their strength, durability, and stability in order to ensure safe and uninterrupted railroad traffic and provide for long-range increases in railroad traffic. Continuous truss bridges are usually used to cross the navigable channels of large rivers. For nonnavigable streams and small rivers, steel beams or spanning beams made of prestressed reinforced concrete are used.

Steel spans made up of welded elements and sections held together by highly resistant friction bolts are widespread in modern railroad bridges, as are continuous steel beams that function as a unit with the reinforced-concrete slab underlying the roadbed. Arch-type reinforced-concrete railroad bridges are less common. Wooden railroad bridges, which are less durable, may be used only on railroads of the third category.

REFERENCE

Evgrafov, G. K., and N. N. Bogdanov. Proektirovanie mostov. Moscow, 1966.

N. N. BOGDANOV

References in classic literature ?
A man stood upon a railroad bridge in northern Alabama, looking down into the swift water twenty feet below.
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A judge is scheduled to rule Tuesday on whether a 34-year-old Palmdale man will stand trial on charges he stabbed to death his marijuana supplier, then set his body on fire beneath a railroad bridge.
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Amtrak and freight trains along Union Pacific's coastal rail line might not run for several weeks after the 150-foot railroad bridge over the Ventura River sank about 5 feet Monday.
s lease of the northern half of the international railroad bridge at Laredo, Texas, from Mexrail, Inc.
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WESTBORO - Downtown traffic is likely to be worse than usual for at least eight days, while crews repair water pipes near the low railroad bridge.
Over the Ventura River, damage to a 150-foot-long railroad bridge shut down interstate rail service - including Amtrak.