London Heathrow Airport

Berry Systems supplied and installed perimeter and ramp barriers for new multi-storey car park incorporating very thin  concrete decks.

A revised design for the new Heathrow Terminal 2 multi-storey car park called for a floor depth of just 150mm comprising a 60mm deep slab with 90mm structural topping. However, and there’s always a however, a traditional rigid safety barrier post needs fixing with 4 bolts each to a depth of 170mm. Obviously these couldn’t be used,

so contractors Laing O’Rourke turned to barrier specialists Berry Systems to provide a solution and appropriate perimeter barriers for the 6 decks and the spiral entrance and exit ramps.

Over many years Berry Systems have developed a range of flexible spring steel barriers that ‘give’ on impact. This not only reduces damage to both the barrier and an impacting vehicle but crucially reduces the pull out loading on the anchorage by 50% or more. This in turn allows post fixing to be achieved by using only a single bolt embedded to a depth of merely 110mm - a depth achievable into the new slabs.

The specification was completed with Berry Beam safety rails to provide a more attractive appearance than the well known “Armco” style. Post extensions provided mountings for a pedestrian handrail at 1100mm high with integral anti-climb mesh where needed.

The thin slabs were developed by Bison Manufacturing and are the thinnest precast concrete planks produced to date in the UK. They led to many benefits which considerably reduced the construction programme. It also allowed 6 floors in the usual height of 5, increasing capacity to 1340 spaces. But perimeter protection would have proved problematical without the expertise of Berry Systems.