Breakaway steel guardrail post

Details Breakaway steel guardrail post Breakaway steel guardrail post

1998-11-04

1999-11-23

Reichard, Lynne

Fences

Highway guard

256 1, 256DIG5, 403 2, 52 98, E01F 1500

Patent

active

059885980

ABSTRACT:
A breakaway guardrail post includes upper and lower post sections spaced apart but connected by a breakaway joint. The joint is attached at one end to the upper post by a first fastener set and connected at a second end by a second fastener set. The first fastener set has a failure strength less than that of the second fastener set. Upon impact forces being applied to the upper post section, the first fastener fails and the upper post section rotates downwardly.

REFERENCES:
patent: 1677796 (1928-07-01), Parks
patent: 3606222 (1971-09-01), Howard
patent: 4236843 (1980-12-01), Chisholm
patent: 4330106 (1982-05-01), Chisholm
patent: 4928446 (1990-05-01), Alexander, Sr.
patent: 5484217 (1996-01-01), Carroll et al.
patent: 5664905 (1997-09-01), Thompson et al.

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