Patent ID: 7699293
Filing Date: 2010-04-20
Classification: E01F

Abstract:
1. An impact head mounted to a terminal support post of a guardrail and having a cable routing means downstream of an impact face of the impact head, wherein the cable routing means comprises a bar member having a longitudinal axis and at least one cable entry port; wherein at least one cable extends from a fixed point at the terminal end of the guardrail and passes directly through the at least one cable entry port when said bar member is in a first non-cable gripping orientation; and wherein the bar member is pivotally mounted within the impact head such that upon rotation of said bar member through at least substantially 90 degrees about said longitudinal axis, a second cable-gripping orientation is reached which provides a cable routing means forming a tortuous path through which the at least one cable is threaded, wherein the tortuous path itself provides sufficient frictional resistance to movement of the at least one cable during impact of a force to facilitate impact energy dissipation.