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Rockfall Netting

Drapery mesh for rockfall protection

Protections of roads, buildings and other structures located directly at the toe of man-made cuttings or natural cliffs are a major challenge for engineers. Falling debris and rocks can be due to rock formation deterioration caused by plant action, thermal expansion, winds, cold and thaw, hydrostatic pressure and seismic action. Geofabrics range of Maccaferri rockfall drapery systems are designed to control rockfall movement by guiding falling debris to a collection point at the toe of the slope thus protecting structures from debris damage. Maccaferri double-twist wire mesh is the ideal for use in the manufacture of drapery of rockfall, due to its flexibility in all directions, and to the fact that it will not unravel, even in the event of some wire breakage. It also does not inhibit the regeneration of vegetation allowing the slope to return back to its natural state after repair.

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Properties

Geofabrics range of Maccaferri drapery is manufactured from Galmac (Zn-5%AL MM alloy) coated wire offering about three times greater protection than zinc coated wire. When Geofabrics drapery comes in contact with more aggressive environments then an additional polymer protective coating is applied over the Galmac coating to maximise the level of protection. The double twist mesh has a high tensile strength to support the debris contained within the draped mesh.

Applications

Maccaferri drapery mesh is typically applied to rock mass whose surface can break down into fragments not larger than 0.6 metres in diameter. On moderately steep slopes, or those where some vegetation may grow, the mesh should be kept as close to the slope as possible. On very steep and/or near vertical slopes, the net must be anchored at the top of the cliff, and left unanchored on the rockfall, thereby allowing rocks and debris to fall into a collection ditch at the toe of the slope. A key factor is to have a safe and continuous anchorage at the top.

Features

  • Does not unravel if wire breakage occurs making it cost effective with low maintenance requirements
  • Flexible and versatile to match existing slope and rock profiles
  • Different levels of coating protection for durability in a wide range of environments
  • Does not inhibit regrowth of vegetation

Supply

Supplied in the following sizes
 

Grade Rockfall Netting
Size (W x L) 2m x 50m