Guard rail construction

Details Guard rail construction Guard rail construction

1979-05-02

1982-05-18

Kundrat, Andrew V.

Fences

Highway guard

256 19, E01F 1500

Patent

active

043301061

ABSTRACT:
A guard rail system including a number of W-beam rail elements with a rail end mounted to one of the elements. A number of vertical posts are provided for supporting the rail elements in substantially horizontal position, the four posts closest to the rail end being mounted to break away upon an axial impact. The rail elements are attached to each other in overlapping relationship so that they will move axially with respect to each other upon an axial impact, but will maintain full tensile strength, and thus their re-directional characteristics, upon other than axial impacts, by a plurality of first bolts received by openings in the rail elements. Each opening is bordered on one end thereof by a tang formed in the rail element. Second, frangible bolts attach the rail elements to the posts. The guard rail system prevents spearing, as well as absorbing the energy of the impact.

REFERENCES:
patent: 2025014 (1935-12-01), Brickman et al.
patent: 2085098 (1937-06-01), Height et al.
patent: 2101176 (1937-12-01), Height
patent: 2180286 (1939-11-01), Roemer
patent: 2536760 (1951-01-01), Martin et al.
patent: 2776116 (1957-01-01), Brickman
patent: 3966173 (1976-06-01), Glaesener
patent: 4071970 (1978-02-01), Strizki
"Guide for Selecting, Locating and Designing Traffic Barriers", vol. 1 Guidelines, Feb. 1976, FHWA-RD-76-503, pp. 64 & 65.

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