Guardrail


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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 ?
Oorreel admits guardrails are not something people are crazy about in general, but that could change.
The guardrail keeps you on the road so you don't hit a fixed object,'' he said, adding that years of science have made guardrails as effective as they are today.
Cable guardrail systems received the increased attention due to their low installation cost and excellent safety performance.
The authors of the present paper examine the deformation processes of the elements of the above-mentioned type of guardrail.
While governments cannot afford to convert every existing guardrail into a Jersey barrier, you should look into some common defects in guardrail construction.
Guardrails installed on all open ends need to be about 42 inches high with a mid-rail at about 21 inches, just like the guardrails inside the house.
The failure of the LBSS program has forced the Army to try to leverage funding programmed for ARL and Guardrail upgrades so that this work can, in turn, be leveraged for future development of the ACS.
She is also suing Branksea Marine, who fitted the new guardrail.
In addition to CPSC's standard, there is a voluntary standard, ASTM F 1427-96, that addresses additional hazards such as foundation and guardrail structural integrity.
In the report, Safety Analysis of Extruding W-Beam Guardrail Terminal Crashes, the researchers detail the limitations and offer several recommendations, including new crash test criteria for installing guardrail terminals.
Virginia is suing the guardrail maker Trinity Industries, saying that it sold the state thousands of pieces of potentially dangerous, improperly tested and unapproved products.