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Avon RB780CR K4 Chieftain Road Blocker

RB780CR K4 Chieftain Road Blocker

The Avon RB780CR K4 High Security Road Blocker, a hostile vehicle mitigation solution providing a high level of security against unauthorised vehicle access.

The road blocker is designated as a Vehicle Security Barrier (VSB) and has been independently physically impact tested by the Motor Industry Research Association (MIRA).  The test was conducted in excess of the Department of State test standard SD-STD-2.01 revision A, and achieved a certification class K4 L3 rating.

Road Blocker K4
RB780CR K4 Road Blocker

Key features & benefits


  • Physically impact tested
  • Manufactured from heavy gauge materials
  • Manual hand pump facility
  • Programmable logic control system
  • 100% duty cycling
  • Fully clad base



  • Confidence in proven performance
  • Strength and durability
  • Operational under power failure conditions
  • Flexibility to interface with all forms of access control
  • Reliable and dependable
  • Simple to install

Product overview

The road blocker was impact tested to the American Department of State (DOS) SD-STD-2.01 revision A K4/L3 ~ ASTM 2656 M30/P1 Penetration: 500mm. This standard was to certify the vehicle security barrier to a specific level of anti-ram protection.

A Hostile Vehicle Mitigation (HVM) solution providing protection to sites from Vehicle Borne Improvised Explosive Device (VBIED) attack.

Hydraulically operated, driven both up and down by a double acting hydraulic ram ensuring a positive action at all times without reliance on gravity for operation.  The power unit (HPU) is positioned locally within an externally rated cabinet and an emergency fast raise operation option is available.

The road blocker comes with a push-button control as standard. However, it can be customised to interface with a wide range of access control equipment to suit specific customer requirements. Available configurations include (but are not limited to) inductive loop systems, card readers, communication equipment and manned guard emergency systems can be accommodated.

Where the blockers control point is remote from the installation, we strongly recommend the fitting of a recordable CCTV system, traffic lights and inductive loop systems.

For safety reasons pedestrians, cyclists and motorcycles are advised not to use a blocker controlled roadway, additional safety measures can be incorporated into the blocker system if required.

This is a specialist high security product and is designed for use with vehicles only and a full site risk assessment must be carried out at design stage to ensure that all relevant safety systems are included.

Road Blocker

Options available

  • Emergency fast raise system
  • Emergency buttons with lock down
  • UPS backup for the electrical system
  • Accumulator systems for hydraulic operation in power failure conditions
  • Access and intercom systems
  • Inductive loop systems
  • Traffic lights and back-indications systems
  • Integral inset warning lights in blocking segment
  • Interlocking systems to give air-lock type protection on sites with higher threat levels

Avon RB780CR K4 Chieftain Road Blocker - Resources

Datasheet – Avon RB780CR K4 Chieftain Road Blocker
Format: pdf

Datasheet for Avon RB780CR K4 Chieftain Road Blocker

Technical Specification

Physical Dimensions:
2m Road Blocker: 2m Road Blocker – 2510mm W x 1770mm D x 1000mm H
HPU Cabinet: 935mm W x 660mm D x 1295mm H
Raised height of blocking segment : 800mm
Blocker widths available: 2-6 metres in 500mm increments
Basic Power requirements: 3-Phase 415v AC, 50Hz, (other voltages are available)
Control Voltage: S.E.L.V 24V
Performance: Loading 30 Tonnes
Impact Absorption: 1852KJ (fully operational immediately after impact)
DOS Classification:  SD-STD-2.01 revision A K4/L3 ~ASTM 2656 M30/P1
Tested Model: 800mm H x 2.0m W
Speed of operation: 6 Seconds to raise or lower (alternative speeds available)
Emergency Fast Operation (EFO) (option): <1 second to raise 
Operating temperature range available: -25°C – +75°C
Construction: The supporting framework is constructed from fully welded, heavy gauge, high strength, structural steels completely encased with steel sheets to provide a self-shuttered module. Sub-surface fixing points ensure the blocker is completely secured to its foundation.


Find out about our other road blockers

Our hostile vehicle mitigation solutions include a range of road blockers that suit a variety of environments including shallow foundations and surface mounted road blockers

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