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Bar gate. Animation of level crossing booms lowering in Queensland, Australia. A bar gate in the Netherlands. A bar, post, pole, beam, or boom gate, [1] also known as a boom or a boom barrier, [citation needed] is a beam or bar on a pivot used as a gate. The boom is lowered to block vehicular or pedestrian access through a controlled point or ...
The gates of the barrier were fabricated in sections at Cleveland Bridge's Darlington works and assembled at Port Clarence on the River Tees. [ 7 ] : 251 The gates, gate arms and rocking beams were transported from the Tees to the Thames by barge and lifted into position by two very large floating cranes operated by Neptun of Hamburg (now part ...
The Maeslantkering ("Maeslant barrier" in Dutch) is a storm surge barrier on the Nieuwe Waterweg, in South Holland, Netherlands. [1] It was constructed from 1991 to 1997. As part of the Delta Works the barrier responds to water level predictions calculated by a centralized computer system called BOS. It automatically closes when Rotterdam ...
These were Bombardier's EBI Gate 2000 barriers (also called the EBI Gate 630) which were used alongside the Bombardier EBI Gate 2000 system. [37] These have barrier arms that are safer in the event of them being hit, as they break in set places. They also have supporter pogo-sticks at the end of the barrier as did the GWE barriers beforehand.
Road Zipper machine at the Golden Gate Bridge, San Francisco, California. A barrier transfer machine, also known as zipper machine or road zipper, is a type of heavy vehicle that is used to transfer concrete lane dividers, such as Jersey barriers, in order to relieve traffic congestion during rush hours. Many other cities use them temporarily ...
The gate arms are reinforced with high-strength steel cable, which helps the gate absorb the impact of a vehicle crashing into the gate. The manufacturer claims that the StopGate can stop a 2,000-kilogram (4,400 lb) truck within 13 feet (4.0 m).
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