Aisle End & Opposite Down Ramps Protection Systems

The latest ICE/ISE recommendations outline the need for a ‘twice force’ (i.e. 300kN) system where traffic travel can exceed 20m in length. Twice force barriers need to withstand a 1500kg car travelling at 14.4mph. Primarily this relates to traffic flow aisle ends and opposite ramps of downward travel. This requirement is achieved by either using heavier duty systems or, in some cases reducing post centres on standard systems.

» RB1X (100 x 20) Spring Steel Buffers with Open Box Beam fitted at 1200mm centres

Standard Height: 610mm

No of fixing bolts: 1

The thicker heavy duty box beam enables it to absorb more impact than the standard corrugated rail. A combination of the spring steel properties of the buffer and the 5mm thick box beam means that the enormous energy potentially generated under impact is largely absorbed minimising damage to both anchorages and vehicles.

 

 

 

 

» Flexi-Posts with Barrier Rail fitted at 800mm centres

Standard Height: 610mm

No of fixing bolts: 4

Ideal for use where space for deflection is limited. Testing has shown that reducing the post centres increases the strength of the system when using barrier rail. The semi-flexible solution offered by the Flexi-Post is able to contain vehicles at the higher speeds twice force areas demand.

» Rigid P224 Posts with Berry Beam fitted at 800mm centres

Standard Height: 610mm

No of fixing bolts: 4

For use when minimal deflection is essential but in consequence significantly increased load is transferred onto the structure compared to flexible systems.

NB. Where these barriers are used in areas accessible by pedestrians, or where perimeter protection is also needed, then handrail extensions and anti-climb mesh infill panels should also be fitted. The ICE/ISE recommendations also state that temporary or permanent changes in traffic flow should be anticipated so that twice force barriers should be considered to be installed opposite the bottom of 'up' ramps and at both 'aisle end' locations in case traffic flow ever needs to be reversed.