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Smithfield Street Bridge
Society: ASCE Main Category: Civil Sub Category: Bridges Era: 1880-1889 DateCreated: 1883 Monongahela River Pittsburgh State: PA Zip: 15222 Country: USA Website: http://www.asce.org/Project/Smithfield-Street-Bridge/ Creator: Lindenthal, Gustav

Three rivers - the Allegheny, Monongahela, and Ohio - join in Pittsburgh, making the city a natural site for the building of bridges. But the Smithfield Street Bridge stands apart from other Pittsburgh bridges for several reasons: it replaced structures by two well-known bridge engineers, Lewis Wernwag and John A. Roebling; it was the first use in America of the lenticular - or lens-shaped - truss design; and it was one of the first major bridges in the U.S. built primarily with steel.

YearAdded:
1975
Image Credit: Courtesy Flickr/RJ Schmidt (CC BY-ND 2.0) Image Caption: Smithfield Street Bridge Era_date_from: 1883
Society: ASME Main Category: Mechanical Sub Category: Minerals Extraction & Refining Era: 1700-1749 DateCreated: 1742 94 Rexmont Rd Lebanon State: PA Zip: 17042 Country: USA Website: http://www.asme.org/about-asme/history/landmarks/topics-m-z/minerals-extraction-and-refining/-106-cornwall-iron-furnace-%281742%29 Creator: Grubb, Peter
When erected by Peter Grubb to smelt the rich iron ore of the nearby Cornwall ore banks, this stone-built blast furnace was typical for its time, producing about 20 tons of pig-iron and cast-iron products a week. A major reconstruction in 1856 to 1857 produced important changes: the furnace itself was enlarged; the blast-air bellows were replaced by a pair of wooden cylinder "blowing tubs"; the waterwheel that had powered them was replaced by a 20-horsepower steam engine; and a pair of waste-heat boilers to supply the engine was built into the open stack of the furnace.
YearAdded:
1985
Image Credit: Courtesy Wikipedia/Wherring (CC BY-SA 3.0) Image Caption: Cornwall Iron Furnace Era_date_from: 1742
Cooper Steam Traction Engine Collection
Society: ASME Main Category: Civil Sub Category: Agriculture Era: 1860-1869 DateCreated: 1860s Knox County Historical Society Mount Vernon State: OH Zip: 43050 Country: USA Website: http://www.asme.org/about-asme/history/landmarks/topics-a-l/agriculture/-201-cooper-steam-traction-engine-collection-%28late, https://www.asme.org/getmedia/4071fc96-7a0c-4d14-8f4e-5d9371c259b2/201-Cooper-Steam-Traction-Engine.aspx Creator: Cooper & Co.

These engines, built by Cooper & Co., of Mount Vernon are among the oldest surviving agricultural steam engines to show the evolution from the portable, skid-mounted engine (ca. 1860) to the horse-drawn engine (1875), through the self-propelled but horse-guided engine (1875) and finally to the self-propelled, self-steered traction engine (1883). Such engines powered the conversion to mechanized farming, which was a great hallmark of the Industrial Revolution.

YearAdded:
1998
Image Credit: Courtesy ASME Image Caption: Cooper Self-Propelled, Self-Steering Traction Engine Era_date_from: 1860s
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Cooper Steam Traction Engine Collection

These engines, built by Cooper & Co., of Mount Vernon are among the oldest surviving agricultural steam engines to show the evolution from the portable, skid-mounted engine (ca. 1860) to the horse-drawn engine (1875), through the self-propelled but horse-guided engine (1875) and finally to…

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When erected by Peter Grubb to smelt the rich iron ore of the nearby Cornwall ore banks, this stone-built blast furnace was typical for its time, producing about 20 tons of pig-iron and cast-iron products a week. A major reconstruction in 1856 to 1857 produced important changes: the furnace itself… Read More
Smithfield Street Bridge

Three rivers - the Allegheny, Monongahela, and Ohio - join in Pittsburgh, making the city a natural site for the building of bridges. But the Smithfield Street Bridge stands apart from other Pittsburgh bridges for several reasons: it replaced structures by two well-known bridge engineers, Lewis…

Read More

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