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The world's first operational mountain-climbing cog railway (rack-and-pinion railway), the Mount Washington Cog Railway in Coos County, New Hampshire — in operation since its opening in 1869 — uses a 4 ft 8 inch (1,422 mm) rail gauge, as designed by Sylvester Marsh, the creator of the Marsh rack system for ensuring firm traction going up ...
In Mexico, steel I-beams are called IR and commonly specified using the depth and weight of the beam in metric terms. For example, a "IR250x33" beam is approximately 250 mm (9.8 in) in depth (height of the I-beam from the outer face of one flange to the outer face of the other flange) and weighs approximately 33 kg/m (22 lb/ft). [9]
[11] [26] The main floor-girders vary in depth from 8 inches (200 mm), for I-beams, to 45-inch (1,100 mm) box girders. The ceilings are made of wire lath and finished in plaster. The columns of the superstructure vary in size; the larger columns are generally 25 inches (640 mm) thick and are built up of riveted steel sections. [32]
Sciaky, Inc. is an American manufacturer of metal 3D printing systems and industrial welding systems, founded in 1939 and headquartered in Chicago, Illinois. It specializes in electron beam welding systems and services for aerospace manufacturers. [1] In 2009, Sciaky entered the 3D Printing field with its electron beam additive manufacturing ...
In 1895–99 Chicago was refitted at the New York Navy Yard, with her main batteries replaced by four new 8-inch (203 mm)/35 caliber Mark 4 guns, [6] and with all secondary 6-inch and 5-inch guns replaced by fourteen new 5-inch (127 mm)/40 caliber Mark 3 guns. [7]
The Illinois Steel Company was founded in 1889 following the consolidation of three companies; The North Chicago Rolling Mill Company had plants in Chicago, South Chicago, Chicago (1880), and Milwaukee, Wisconsin (1868), The Union Iron Company (1863) of Chicago and the Joliet Steel Company (1870) were also involved in the merge.
The New York Times writes that it is both a "tourist magnet" and an "extraordinary art object", [51] [53] while USA Today refers to the sculpture as a monumental abstract work. [54] Chicago art critic Edward Lifson considers Cloud Gate to be among the greatest pieces of public art in the world. [ 47 ]
Next, a series of eight 18-inch-deep (46 cm) I-beam "stringers" were installed (positioned longitudinally). This was the final steelwork step involved, and the deck was soon raised 1 foot 6 inches (0.46 m) on each corner to attach the suspender cables and their "jewels" [ clarification needed ] to the vertical stiffening truss members.
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