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Moreover, their position must also be coordinated with the reinforcement layout. [3] Different types of cast-in-place anchors might be distinguished: [3] Lifting inserts: used for lifting operations of plain or prestressed RC beams. The insert can be a threaded rod. See also bolt (climbing). Anchor channels: used in precast concrete connections ...
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Single helix earth anchors Guyed mast anchor. An earth anchor is a device designed to support structures, most commonly used in geotechnical and construction applications. Also known as a ground anchor, percussion driven earth anchor or mechanical anchor, it may be impact driven into the ground or run in spirally, depending on its design and intended force-resistance characteristics.
The concrete block manufacturer thrived in the rapidly growing post-World War II economy, manufacturing as many as 1,000 concrete blocks each day. By 1951, West Allis Concrete Products was receiving high-quantity orders to supply concrete block for Milwaukee County Stadium , Wisconsin State Fair Park , and Kohl's Department Stores , as well as ...
[3] The company filed for Chapter 11 bankruptcy protection on April 29, 2010. [4] It emerged from bankruptcy on August 31, 2010 after reducing its debt by $272 million. [5] On October 30, 2012, Central Concrete Supply Co., Inc., a wholly owned subsidiary of U.S. Concrete, completed the acquisition of Bode Gravel Co. and Bode Concrete LLC. [6]
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Other varieties of wall plug are mechanical anchors for heavy duty loads and hollow wall fixings for fixing to plasterboard. The first mechanical anchor, the Rawlbolt, was designed in the 1930s by the Rawlplug company and the first fixing for hollow walls was the Toggle Bolt, which was also designed by Rawlplug in 1941.
Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]