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J-J Hooks Concrete Traffic Barrier

Smith-Midland manufactures, sells and rents thousands of feet of safety and security precast concrete barrier to meet your immediate needs. Installation crews and equipment are ready to start setting your barrier right away. More than one mile of barrier can be installed in 8 hours. We install highway safety barrier, security barrier, barrier with security fence, and J-J Hooks planters for all your temporary and permanent requirements. For more information download the J-J Hooks Brochure or visit

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The Benefits of J-J Hooks Concrete Barriers:

Self-aligning with no loose hardware
  • The only concrete barrier system available with no pins, bolts, or loose hardware that meets and exceeds the MASH and NCHRP-350, Test Level 3 requirements.
  • Self-aligning - automatically “hooks” into place
  • Identical ends allow you to turn the barrier end-for-end
  • Fastest setting times and lowest installation costs
  • Vertical lift simplifies installation and removal
  • One barrier can be removed without disturbing adjacent barriers
  • Smaller installation crews, no loose hardware
  • Eliminates replacement costs for rusted nuts and lost bolts
  • Improved safety - no hands between barrier segments during placement
  • Tight radius ability
Fastest install/remove design has theft-proof connection
  • No loss of structural integrity or security breach due to lost or stolen hardware
  • Theft-proof connection means no missing or stolen pins and loose hardware
  • Self-aligning means no need to “jostle” barrier when installing or removing pins that bind and slow setting/removal

Smith Midland freestanding j j hooks

Concrete Barrier Rentals

For information on rental barrier visit our rental division, Concrete Safety Systems.

  1. Standard free-standing MASH TL3 and NCHRP-350 barrier for highway and street construction projects. Bolt-down and Pin-down MASH TL3 barrier for bridges and specialized road project.
  2. Protecting utility plants, manufacturing facilities, office buildings, government installations, and city streets. Control vehicular and pedestrian traffic for major events, conferences, and concerts.
  3. Temporary security using J-J Hooks security fence to provide a higher level of security than any other temporary measure.
  4. Close off potentially dangerous areas such as foundations, propane tanks,
    excavated areas, damaged guardrails, and damaged bridges.
  5. Standard J-J Hooks barrier sections can be delivered from stock on short notice.
    Additionally, the sections can be modified to include a top-mounted security fence.

Smith Midland J J Hooks culpeper mash route 29

The J-Hook Connection

The J-J Hooks connection consists of two identical steel J-shaped hooks, which are cast into the barrier, creating a continuous steel connection. To attach the barrier ends, one barrier is lowered vertically next to an adjacent barrier. With minimal guidance, the self-aligning connection automatically “hooks” into place. Workers don’t need to endanger their hands by having them in between barriers during the connection process. The NCHRP 350 and MASH barrier designs connect directly to each other.

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J J Hooks Handout Smith Midland 1