Skip to main content

REBLOC H4b Gantry: milestone in safety

The slim profile of the H4b Highway Gantry means it excels in congested areas where there is heavy traffic but little land for traditional gantry systems.
By David Arminas April 9, 2024 Read time: 2 mins
REBLOC’s integrated system provides a double-sided H4b safety barrier that acts as foundation for the base pole of the gantry system (image courtesy REBLOC)

REBLOC reports that it has unveiled the world's first H4b-tested highway gantry system, a pioneering breakthrough in road safety.

The company says that its new system revolutionises the conventional approach of a cast-in-place foundation that includes the base pole and safety barriers on both sides.

REBLOC’s integrated system provides a double-sided H4b safety barrier that acts as foundation for the base pole of the gantry system. Rigorous H4b testing of the complete system has shown exceptional stability, making it ideal for central reservations to ensure superior safety.

The system comprises three precast concrete barriers. The two outer barriers flank the central barrier housing the integrated foundation and base pole. EN-1317 compliant testing ensures reliability upon vehicle impact.

Additional installations including light poles or traffic signs can be easily incorporated on top of the certified system. The precast concrete elements are securely anchored to an embedding depth of only 200mm. An inspection access simplifies electric cabling. All three elements are firmly connected using steel plates on top of the barriers.

REBLOC says that the system's no-deflection performance in H4b testing means that it is suitable for central reservation use on highways with high speed limits. But there are many other key features, such as the design itself – it optimises space and aesthetics as well as eliminates the need for separate structures.

As well, the slim profile - less than 1m wide at its widest point - means it excels in congested areas where there is heavy traffic but little land for traditional gantry systems.

For more information on companies in this article

Related Content

  • Interchange project wins major engineering award
    December 11, 2015
    The Section 5 Palmetto SR826/836 Interchange project in Florida has won the 2016 FICE Engineering Excellence Grand Award in the Structures category.
  • Stirling Lloyd in the fast lane: Waterproofing Warsaw’s Rowecki Bridge
    January 19, 2016
    Warsaw’s General Stefan Rowecki Bridge, or the Grota Bridge, is the second largest in the Polish capital and, as part of the Trasa Toruska expressway, it is the busiest. The structure, which opened in 1981, handles 150,000 cars daily, so repairs were always going to be tricky if minimal disruption to traffic was to occur. The steel orthotropic deck consists of two structurally independent parts – each with four traffic lanes. This meant that pedestrians and cyclists were restricted to two very narrow track
  • World growth in geosynthtics set to rise
    February 17, 2012
    With geosynthetics sales set to grow rapidly in the next three years, manufacturers are preparing for the demand. Patrick Smith reports. Global demand for geosynthetics is projected to increase 5.3% annually to 4.7 billion m² in 2013 with countries such as China, India and Russia expected to post the strongest gains through the forecast period. All are building large-scale infrastructure developments and face evolving environmental protection regulations and strict building construction codes.
  • Barrier system offers containment, noise reduction
    April 5, 2012
    Italian firm Marcegaglia has developed a new range of steel road safety barriers that is said to be versatile and cost effective. The units meet containment levels N2 to H4 and can be specified for different options in terms of working width levels (W). The line-up includes a dedicated system for motorcyclist protection designed to be fitted to all existing guardrails, a new P4 energy absorbing terminal system for barriers and a renewed range of steel New Jersey barriers, with optional integrated noise prot