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Oldcastle Materials Inc. is a supplier of asphalt, concrete, and other building materials, and also offers construction and paving services. The Atlanta-based company is a subsidiary of CRH plc, a publicly traded international group of diversified building materials businesses, [2] [3] and has approximately 18,000 employees at 1,200 locations, as of March 2018.
A basement wall is thus one kind of retaining wall; however, the term usually refers to a cantilever retaining wall, which is a freestanding structure without lateral support at its top. [2] These are cantilevered from a footing and rise above the grade on one side to retain a higher level grade on the opposite side.
CRH entered the United States in 1978 by buying Amcor, a concrete products group in Utah which would then form the basis of the company's U.S. division, which is now called Oldcastle Inc. Subsequent large purchases in the US included Callanan Industries, a New York State based aggregates and asphalt producer in 1985. [6]
In June 2007 BlueScope Steel Limited sold its Vistawall Group division for $190 million to Oldcastle Glass Inc, a subsidiary of CRH plc. [3] In June 2010 Oldcastle Glass rebranded to Oldcastle BuildingEnvelope. [4] On February 28, 2022, it was announced that CRH would be selling Oldcastle BuildingEnvelope for $3.8 billion to KPS Capital ...
The most efficient way to pack different-sized circles together is not obvious. In geometry, circle packing is the study of the arrangement of circles (of equal or varying sizes) on a given surface such that no overlapping occurs and so that no circle can be enlarged without creating an overlap.
An example of lateral earth pressure overturning a retaining wall. The lateral earth pressure is the pressure that soil exerts in the horizontal direction. It is important because it affects the consolidation behavior and strength of the soil and because it is considered in the design of geotechnical engineering structures such as retaining walls, basements, tunnels, deep foundations and ...
An FoS is a feature that can have size associated with it, usually involving the opposition of two surfaces (e.g., the two diametrically opposite sides of a hole wall; the two opposite walls of a slot or flange). Features of size (FoSs) in reality always have actual sizes and forms that differ from their theoretical size and form; the purpose ...
A page from Archimedes' Measurement of a Circle. Measurement of a Circle or Dimension of the Circle (Greek: Κύκλου μέτρησις, Kuklou metrēsis) [1] is a treatise that consists of three propositions, probably made by Archimedes, ca. 250 BCE. [2] [3] The treatise is only a fraction of what was a longer work. [4] [5]