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The strong-post W-beam guardrail consists of wood posts and wood blockouts or steel posts with wood or plastic blockouts. The wood or plastic blockouts reduce or minimize a vehicle snagging on the posts upon impact. In addition, a blockout may be used to increase the offset of guardrail with an obstacle such as a curb.
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 ...
Traditionally made of wood, or wood and steel, many now have structural members made wholly of plastic or composite materials, and may be fitted with flashing lights. The obstruction that necessitates the use of a traffic barricade may be excavations, construction , roadblocks , debris , crime scenes , restricted areas, or other hazards.
The ET-Plus Guardrail system is a guardrail end terminal system manufactured by Trinity Highway Products, based in Dallas, Texas. The ET-Plus was designed at the Texas A&M Transportation Institute and built by Trinity. The end terminal cap absorbs the impact of a crash. The wooden posts break and the guardrail collapses. [3]
High-tension cable consists of three or four pre-stretched cables supported by weak posts. Currently, all high-tension systems are proprietary, that is, marketed under exclusive right of a specific manufacturer. During installation, the cables are placed on the posts, and then tightened to a specific tension according to temperature. The ...
Posts on a deck are also typically pressure treated wood and standard sizes are 4x4, 6x6, and 8x8. These posts give structural support to the railing assembly and are the most critical part for the safety of the guard rail assembly. [15] In between the posts, two 2x4s are attached to the posts with screws for the best connection.
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Struts connecting the posts are made of back-to-hack angles connected by lattice bracing. The bridge deck is of wood plank, and is supported by steel stringers which are in turn supported by I-beam girders. Two sets of channels form a guardrail on each side.
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