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A buffer stop, bumper, bumping post, bumper block or stopblock (US), is a device to prevent railway vehicles from going past the end of a physical section of track. The design of the buffer stop is dependent, in part, on the kind of couplings that the railway uses, since the coupling gear is the first part of the vehicle that the buffer stop ...
Traffic barrier with a pedestrian guardrail behind it. Traffic barriers (known in North America as guardrails or guard rails, [1] in Britain as crash barriers, [2] and in auto racing as Armco barriers [3]) keep vehicles within their roadway and prevent them from colliding with dangerous obstacles such as boulders, sign supports, trees, bridge abutments, buildings, walls, and large storm drains ...
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.
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The renovation added an elevator near the eastern Lippmann Plaza exit that made the station compliant with the Americans with Disabilities Act of 1990. The project also added new street entrances and a large entrance hall near Lippmann Plaza at the far east end of the station, beyond the bumper blocks at the end of the tracks. [12] [49] [50] [51]
PVC, PE and TPV waterstops are made continuous for the length of the concrete joint by heat welding, using simple thermoplastic welding equipment. [1] PE and TPV waterstops are generally installed in joints of secondary containment structures to prevent the passage of hazardous fluids other than water such as fuel oils, acids, or process ...
When installing pavers over top of an existing asphalt of concrete pad, there are three installation options: sand set, bituminous set, and mortar set. [1] Due to rising oil prices, these methods are often less expensive than an asphalt overlay and last three times longer in addition to providing a greener, more sustainable solution.
The bottom of this trough contains a foundation of concrete no less than 4 inches (100 mm) thick. Each platform consists of 3-inch-thick (76 mm) concrete slabs, beneath which are drainage basins. The platforms contain double-height, tile-clad columns spaced every 15 feet (4.6 m), which support the jack-arched concrete station roofs. There is a ...
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