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Precast concrete is a construction product produced by ... hand holes, hollow-core products, light pole bases, meter boxes ... Panels of 9-foot clear height are ...
The pole that the lighting is mounted on is generally at least 30 m (98 ft) tall (under this height it is referred to as conventional lighting system), [1] while the lighting consists of a luminaire ring surrounding the pole with one or several independent lighting fixtures mounted around it. Most units have four, six or eight lights in the ...
Poles, from which these buildings get their name, are natural shaped or round wooden timbers 4 to 12 inches (100 to 300 mm) in diameter. [4] The structural frame of a pole building is made of tree trunks, utility poles, engineered lumber or chemically pressure-treated squared timbers which may be buried in the ground or anchored to a concrete slab.
The steel pole was 338 feet (103 m) high, 6 feet (1.8 m) wide at the base, weighed 65 tons (without the flag), and was sunk into a 550-cubic yard block of concrete that was 40 feet (12 m) deep, 8 feet (2.4 m) wide and reinforced by steel rods. The American flag was 120 feet (37 m) by 60 feet (18 m), or 7,200 square feet (670 m 2).
Tubular steel poles are typically used in urban areas. High-voltage lines are often carried on lattice-type steel towers or pylons. For remote areas, aluminum towers may be placed by helicopters. [4] [5] Concrete poles have also been used. [1] Poles made of reinforced plastics are also available, but their high cost restricts application.
Shallow foundation construction example. A shallow foundation is a type of building foundation that transfers structural load to the Earth very near to the surface, rather than to a subsurface layer or a range of depths, as does a deep foundation.
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The ingredients in any particular mix depends on the nature of the application. Regular concrete can typically withstand a pressure from about 10 MPa (1450 psi) to 40 MPa (5800 psi), with lighter duty uses such as blinding concrete having a much lower MPa rating than structural concrete. Many types of pre-mixed concrete are available which ...
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