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HEA Panels

Woven steel wire rope rockfall protection system

HEA (High Energy Absorption) panels are manufactured from steel ropes and joined at each crossing point with a high-resistance 3mm wire double knot that exceed the tear and pull apart resistance of traditional clips.  HEA panels are used in secure drapery applications on rock faces where low deflection and a high strength is required.

Due to the multi-axial performance of the HEA panel, loads are transferred effectively to the anchors on the rock slope face regardless of the anchor layout. This makes HEA panels very effective for use with drapery mesh and rock anchors to stabilise rock faces as well as on its own to contain individual unstable rocks in the order of 1-1.5m³ in size.

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Properties

HEA panels combine steel wire rope having a strength of 1770N/mm2 to EN 12385-2 with a pair of 3mm diameter steel wires that form a high strength knot at each cable crossing. All metallic coating of the wire rope and steel wire is Class A (EN 10264-2)

Application

HEA is supplied in panel form rolled up for ease of transport and handling. In rock face stabilisation works the HEA is installed once the anchors have been installed and the drapery mesh has been fixed in place. The rockfall netting drapery is required where detachment of rocks smaller than the HEA cable mesh aperture are expected. Panels are fixed from the top down and are laid side by side with no overlaps. A top horizontal cable having a thickness of 12-16mm is use to support the HEA panels along the crest and anchored into position. Anchors are installed and HEA placed and fixed into position at each anchor point for treatment of individual unstable rocks.

Features

  • Double knot connection for maximum strength transfer
  • Multi-axial configuration for superior multi-directional strength performance
  • High stiffness to limit rock detachment
  • Heavily galvanised for durability
  • Flexible for conforming to irregular rock shapes

Supply

Supplied in the following size

Aperture Size Cable Size Panel Size
300mm x 300mm 10mm 6m x 3m

General Information

MacRO Brochure (PDF)

Technical Information

HEA Panel Datasheet (PDF)

Projects

Otira Gorge Rd (PDF)