Median Barrier Service - Rental or Purchase


Permanent Barrier - MB7A, MB7B, MB7C


F-Shape MB7D, MB7E, MB11A


Transition and Special Design Barrier


Delivery and/or Installation Available


In the early 1990’s Rockingham Precast recognized a need for a positive lock crash barrier system for highway use. At the time, the pin and loop connections were the most widely used, but they only achieved marginal performance ratings under National Cooperative Highway Research Program (NCHRP) test ratings. Rockingham Precast designed and developed the first T-LOK® concrete barrier and quickly passed the NCHRP 350. With the help of Texas A&M University and the Texas Transportation Institute Proving Ground crash test facility, Rockingham Precast continued to develop their design to meet the needs of their users.

In addition to use as highway rated safety barriers, T-LOK® has been used in many other applications including security barriers at the United States Capitol Building in Washington, D.C. The testing of early T-LOK® prototypes and models led to the design changes that make up today’s basic design concept.

In 2009, the connection was streamlined to economize time in the field during the installation process while also becoming the industry’s first MASH08 approved barrier. Currently the T-LOK® connection system utilizes a 12” tall connection design that meets the requirements of the NCHRP MASH08 TL-350. The Federal Highway Administration (FHWA) accepted the barrier design in 1997 and again in 2009.

The new T-LOK® barrier design has no loose parts and can be interlocked with new and old models to meet the length of need. T-LOK® was designed to allow placement along curves and grades while still maintaining ease of placement and superior safety.

Easy and economical.
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