Guardrail


Also found in: Dictionary, Thesaurus, Acronyms, Wikipedia.
Related to Guardrail: guardrail system

guardrail

[′gärd ‚rāl]
(civil engineering)
A handrail.
A rail made of posts and a metal strip used on a road as a divider between lines of traffic in opposite directions or used as a safety barrier on curves.
A rail fixed close to the outside of the inner rail on railway curves to hold the inner wheels of a railway car on the rail. Also known as check rail; safety rail; slide rail.

Guardrail

 

a rail laid along track rails in order to guide the wheels of rolling stock. In curved track sections, guardrails reduce the wear of the outer track sides and prevent a lateral shifting of track rails. In the frog part of switches, guardrails guide the wheels of the rolling stock into the appropriate groove of the frog. Guardrails are made of pieces of standard rails. In switches both standard rails and rails of special cross sections are used.


Guardrail

 

a protective structure to prevent vehicles from running off roads. Guardrails are made of reinforced-concrete beams, metal strips, or masonry and concrete structures. The best types use metal strips and cables that are attached to supports by flexible components and permit elastic deflection when struck. Their height is not more than 0.8 m; the locations where they are compulsory in the USSR are regulated by the design standards for motor roads. During the night they serve to orient drivers, because light-reflecting units (catadioptric devices) are mounted on them. The reflectors on the right side of the traffic lane are red, and on the left side they are yellow or white.

References in periodicals archive ?
The minimum depth of preservative penetration required for guardrail posts in AWPA Standard U1 (AWPA 2014) is 10 mm on 16 of 20 cores removed from a given treatment charge, while the required chromated copper arsenic retention for material for highway construction is 8.0 kg/[m.sup.3] (AWPA 2014).
Oorreel admits guardrails are not something people are crazy about in general, but that could change.
The problems, associated with the investigation and increase of motor road guardrail safety, have been in the focus of the researchers in various countries for many years.
The function of road guardrails or their elements (band and post) is to reduce the probability for a motor vehicle to violate the traffic by keeping it within roadway limits and by guiding its travel along the longitudinal axis of the guardrail and/or fully stopping it.
General Technical Requirements], the following guardrail parameters and the conditions of vehicle interaction with a guardrail were chosen (see the Table).
For additional information about LS-DYNA and its role in supporting a new bullnose guardrail design, contact Martin Hargrave at (202) 493-3311 (martin.hargrave@fhwa.dot.gov) or John Reid at (402) 472-3084 (jreid@unl.edu).
Trinity Industries, the highway guardrail maker accused of selling systems that can malfunction during crashes and slice through cars, was found by a jury Monday to have defrauded the federal government.
"Slope flattening and guardrail work will start immediately after milling.
The seventh generation of the US Army's Guardrail system, dubbed Guardrail 2000, was recently rolled-out at Moffett Field, CA.
"Witnesses reported that the car was driving erratically prior to the crash, picked up a high rate of speed and went through the guardrail," she said.
Enclosure system: Sides not adjacent to the mezzanine must be enclosed from the ground to the height of the topmost guardrail when the lift is fully raised.
The Washington State Department of Transportation (WSDOT) recently evaluated whether a clear correlation exists between guardrail height and penetration of the guardrail by vehicles.