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Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast beams, and wall panels, floors, roofs, and piles.
Jersey barriers on the road. A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier employed to separate lanes of traffic.It is designed to minimize vehicle damage in cases of incidental contact while still preventing vehicle crossovers resulting in a likely head-on collision.
A tetrapod is a form of wave-dissipating concrete block used to prevent erosion caused by weather and longshore drift, primarily to enforce coastal structures such as seawalls and breakwaters. Tetrapods are made of concrete , and use a tetrahedral shape to dissipate the force of incoming waves by allowing water to flow around rather than ...
An illuminated bollard has a recessed base light unit in the foundation to illuminate the traffic bollard from all angles. [15] The main components are housed below the road or pedestrian surface (typically a concrete surface) so that if a vehicle strikes the traffic bollard the parts below the surface are not damaged.
Cast-in-place concrete or Cast-in-situ concrete is a technology of construction of buildings where walls and slabs of the buildings are cast at the site in formwork. [1] This differs from precast concrete technology where slabs are cast elsewhere and then brought to the construction site and assembled. [ 2 ]
Even though years of experience accounts for a good gauge for the appropriate lifting anchor to be used, it should not be left to the reinforcement fabricators and precast factory personnel to select the lifting anchor. The design engineer should specifically account for the applied loads expected during the lifting, transport and placement (or ...
It backed up river traffic and increased expenses for the towing industry. The Corps initiated the Ohio River Navigation Modernization Program in the 1950s. The program's purpose was to replace the system of outdated wicket dams and small locks. The new dams were non-navigable and made of concrete and steel.
A pile cap is a thick concrete mat that rests on concrete or timber piles that have been driven into soft or unstable ground to provide a suitable stable foundation. It usually forms part of the deep foundation of a building, typically a multi-story building, structure or support base for heavy equipment, or of a bridge.
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