Thrie-beam terminal with breakaway post cable release
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An end treatment for a thrie-beam type guardrail and safety device specifically oriented toward trucks, vans and other utility vehicles having high profiles and centers of gravity. A slotted thrie-beam terminal is featured for use with highway guardrail systems. At least one reinforced slotted section is provided within the thrie-beam terminal to reduce the ability of the thrie beam to resist buckling in response to an axial type loading from end-on impacts. The terminal also provides for gating of laterally impacting vehicles. The terminal incorporates a break-away support post cable release mechanism which lessens risk to impacting vehicles which impact the lead post.
Mak, King K.; Bligh, Roger P.; Ross Jr., Hayes E.; Sicking, Dean L. (1996). Thrie-beam terminal with breakaway post cable release. United States. Patent and Trademark Office; Texas A&M University. Libraries. Available electronically from