Steel mesh fencing manufacturer Zaun has developed a high-security fence that resists sustained attack with specialist power tools for more than 10 minutes.

Zaun has received a revised Certificate of Product Approval from the Loss Prevention Certification Board (LPCB) to include its new CorruSec SR4, approved to Security Rating 4.

The fencing system incorporates corrugated HiSec fencing sandwiched between panels of Super10.

  • LPCB LPS1175 Security Rating 4 (D10)
  • Independently tested with a minimum delay time of at least 10 minutes
  • Unique configuration of welded mesh panels
  • Designed to defeat a range of hand and power tools
  • Used on sites of Critical National Importance
  • In ground or base plated
  • Choice of security toppings
  • Manufactured to BS1722 Part 14

Composition and manufacture

The concept was the brainchild of Zaun Co-founder and Director Alastair Henman in response to customer requests and has been developed by Research & Development Manager Adam Christie.

Christie explains: “Alastair noticed that corrugated cardboard creates a much stronger three-dimensional material. So we started experimenting with a corrugated steel centre section to give fencing greater rigidity and increase its thickness without adding much to the material content and weight, to counter the kind of tools attackers might use.”

Testing

CorruSec SR4 has been subjected to sustained attack by testers from the Buildings Research Establishment (BRE) wielding category D tools, including:

  • 12V jigsaws and disk grinders
  • Axes including an 850mm felling axe
  • A hooligan bar
  • 1.5kg lump hammer
  • 500mm long bolt cutters

Despite this force, they could not breach the CorruSec SR4 in less than 10 minutes.

Technical data

The fencing system is approved at heights from 2.8 to 6m above the ground, while options for 300mm of buried fencing, toppings and stepping up gradients of up to 30º are included in the registered design.

Henman says: “We had been approached by railway line builders and utilities in the Middle East interested in a ‘10-minute fence’, so we set about seeing if we could create a viable product.

“Across our customer base, operators of critical national infrastructure are upgrading their most sensitive sites given heightened fear of terrorist threats and the advances in technology, such as our CorruSec product.”

Specifications

Height
2.80 metre with additional heights on request

Panel Width
2515mm

Mesh Size
76.2 x 12.7mm

Wire Diameter
Attack face
10mm Verticals x 4mm Horizontals

Corrugated
3mm Verticals x 3mm Horizontals

Inner layer
Either: 10mm Verticals x 4mm Horizonals [Non-Buried]
or  4mm Verticals x 4mm Horizontals [Buried]

Top Edge Projection
Minimal (Optional Extra)

Post Size
80 x 80mm

Clamp Bar Size
80 x 5mm

Post Centres
2540mm

Fixing Centres
228.6mm Max.

Fixings
Through Bolts, Washers & Nuts and Anti Tamper Security Fixings