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Neenah Foundry; Company type: Private; Subsidiary: Industry: Foundry: Founded: 1872, 153 years ago: Headquarters: 2121 Brooks Avenue Neenah, Wisconsin, U.S.: Products: Cast iron infrastructure solutions (manhole frames and covers, inlet frames and grates, trench frames and grates, airport products, bridge drainage, tree grates, detectable warning products, downspout boots, access and hatch ...
A round manhole cover of a given diameter has a smaller surface area than a square cover of the same width, thus less material is needed to cast the manhole cover, meaning lower cost. The bearing surfaces of manhole frames and covers are machined to assure flatness and prevent them from becoming dislodged by traffic.
EJ Group, formerly East Jordan Iron Works, is an American manufacturer of iron products, headquartered in East Jordan, Michigan.The company manufactures and distributes iron construction castings (Municipal castings), fabricated products, composite products, water distribution solutions, and other infrastructure access products for water, sewer, drainage, telecommunications, and utility ...
January 24 – A natural gas explosion in an underground chamber of the Utah Light and Railway Company shattered a 200-pound cast iron manhole cover and threw the pieces into the air in downtown Salt Lake City, Utah, forcing pedestrians to take shelter as the debris rained down. [22]
Cast iron frame in Watervliet Arsenal building 40 (c. 1840) Columns made of cast iron were introduced in the 1770s, the first building with multiple storeys using cast iron for both columns and beams is the Ditherington Flax Mill in Shrewsbury (1797). [ 2 ]
Grade adjustment rings can also be used on top of a cone section instead of the chimney section to adjust the frame to the required level. [20] The cover section is the top most section of sanitary manholes. It consists of a frame and a manhole cover. [16] The covers are designed to withstand the loads of the traffic on top of the manholes.