Making Wire Rope and the Wire Rope Industry (1840–48)

2020 ◽  
pp. 164-190
Author(s):  
Richard Haw
Keyword(s):  
United States ◽  
Tall Buildings ◽  
Mass Transit ◽  
The United States ◽  
Wire Rope ◽  
Suspension Bridges ◽  
The Wire ◽  
Allegheny Mountains

After missing out on the Schuylkill Bridge contract, John turned his attention to manufacturing wire rope, an entirely new idea in the United States. John undertook an extensive campaign to have his ropes adopted on the Allegheny Portage Railroad. The effort had John recruiting advocates, dodging political shenanigans, fixing technical hitches, and marching up and down the Allegheny Mountains, and his efforts were successful. Slowly, as each new rope met the demands of the mountain, more and more of the inclines switched over and started to use John’s ropes, as did others in the haulage business. John’s successes made him rich and led to the establishment of the American wire rope industry, in the process helping drag elevators up and down new tall buildings; pull funiculars up steep hills; power rigs, derricks, and cranes all over the nation; hold up suspension bridges of prodigious length; and drive mass transit cable car systems all over the United States.

Economies of Scale (1848–51)

2020 ◽  
pp. 283-318
Author(s):  
Richard Haw
Keyword(s):  
United States ◽  
Economies Of Scale ◽  
Suspension Bridge ◽  
The United States ◽  
Wire Rope ◽  
Suspension Bridges ◽  
Site Specific ◽  
Kentucky River ◽  
The World ◽  
Railroad Bridge

Between 1847 and 1852, John built four separate aqueducts for the Delaware and Hudson Canal; moved his home, family, and wire rope factory from western Pennsylvania to Trenton, New Jersey; secured the contract to build a huge railroad bridge over the Kentucky River; and continued to mount substantial campaigns to win contracts to span the Ohio at Wheeling and the Niagara Gorge. The four D&H spans were mini masterpieces of engineering and planning. Each structure was very different; each required new solutions to site-specific problems. One of the spans, the Delaware Aqueduct, exists to this day, the oldest suspension bridge in the United States and one of the oldest “modern” suspension bridges in the world. On the larger projects, John again lost out to his old rival Ellet on both the Wheeling and the Niagara spans.

The Suspension Bridges of Andrew Smith Hallidie

2018 ◽  
Vol 95 (2) ◽  
pp. 52-70
Author(s):  
Stephen Mikesell
Keyword(s):  
United States ◽  
Suspension Bridge ◽  
The United States ◽  
Suspension Bridges ◽  
Iron And Steel ◽  
History Of ◽  
Transportation History ◽  
Steel Cables ◽  
Mother Lode

Andrew Smith Hallidie (1836–1900) played a central role in the development of the suspension bridge, not only in California but across the United States. While Hallidie did not invent the suspension bridge, he made improvements in the manufacture of iron and steel cables for such bridges. He also built at least eight substantial bridges, all in remote regions of California and elsewhere in the late 1850s and early 1860s. He made a meaningful contribution to the transportation history of the Mother Lode, building bridges that were able to withstand the ferocious floods that decimated the region during the early 1860s.

Good Samaritan Hospital and Its Department of Surgery: A Historical Perspective

2010 ◽  
Vol 76 (5) ◽  
pp. 470-473
Author(s):  
Scott R. Kelley ◽  
Richard E. Welling
Keyword(s):  
United States ◽  
Subsequent Development ◽  
The United States ◽  
United States Government ◽  
Ohio River ◽  
Care Hospital ◽  
National Leader ◽  
Good Samaritan ◽  
Good Samaritan Hospital ◽  
Allegheny Mountains

At the end of the Revolutionary War, the United States government acquired the Northwest Territory, including the city of Cincinnati. Given the city's position on the Ohio River, and the subsequent development and introduction of steamboats in the early 1800s, Cincinnati became a major center for commerce and trade. With a population of over 115,000 in 1850, Cincinnati was the sixth largest city in the United States—larger even than St. Louis and Chicago—the first major city west of the Allegheny Mountains, and the largest inland city in the nation. The city's growth and importance is mirrored by the history of one if its prized institutions, Good Samaritan Hospital—the oldest, largest, and busiest private teaching and specialty-care hospital in Greater Cincinnati and a national leader in many surgical fields.

New Carquinez Bridge, Northeast of San Francisco, California: Technological Design Advancements

2000 ◽  
Vol 1740 (1) ◽  
pp. 40-48
Author(s):  
Thomas Spoth ◽  
Dyab Khazem ◽  
Gregory I. Orsolini
Keyword(s):  
United States ◽  
Reinforced Concrete ◽  
San Francisco ◽  
Suspension Bridge ◽  
The United States ◽  
Suspension Bridges ◽  
Stress Concentrations ◽  
Element Analysis ◽  
Box Girder ◽  
Seismic Safety

The new Carquinez Strait Bridge, northeast of San Francisco, California, will be the first major suspension bridge to be constructed in the United States since the second Chesapeake Bay Bridge in Maryland in 1973. It will replace an existing steel cantilever truss bridge, built in 1927, that was found to be seismically inadequate. The new bridge consists of an orthotropic closed steel box girder superstructure, two main cables 512 mm (20 1/8 in.) in diameter, reinforced concrete towers, and gravity anchorages. The design has set a new standard in modern suspension bridge design in the United States, particularly with respect to seismic safety. Some of the key elements of the design that are discussed are the global design loading criteria for long-span suspension bridges, the design of allowable stresses in main cable wire, the state-of-the-art design detailing of critical welded connections, the finite-element analysis approach for the box girder to determine the actual plate stresses and stress concentrations, and the design of the reinforced concrete tower leg sections for enhanced ductile seismic performance.

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