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In May, Harbor Freight recalled more than 1.7 million Pittsburgh-branded three- and six-ton jack stands that could collapse due to a manufacturing flaw. The flaw on those stands came from worn ...
The cost of the construction of the facility was estimated at $63 million ($1.36 billion today). [3] It produced its 80 millionth ton of steel in 1981 with a workforce of 4,000 that year. [1] In 1943 a Pittsburgh grand jury indicted four Carnegie Illinois foremen for destroying records of steel plating tests conducted at Irvin. [4]
A 2.5-ton house jack that stands 24 inches from top to bottom fully threaded out. A house jack, also called a screw jack, is a mechanical device primarily used to lift buildings from their foundations for repairs or relocation. A series of jacks is used and then wood cribbing temporarily supports the structure. This process is repeated until ...
Stack array of the Jones and Laughlin Pittsburgh Works on the south side of the Monongahela River, 1955.. The Jones and Laughlin Steel Corporation, also known as J&L Steel or simply as J&L, was an American steel and iron manufacturer that operated from 1852 until 1968.
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Strandjack at Freybridge in Berlin–Spandau 52° 30′ 42,11″ N, 13° 12′ 11,7″ O. A strand jack (also known as strandjack) is a jack used to lift very heavy loads (e.g. thousands of tons or more with multiple jacks) for construction and engineering purposes. [1]
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