Rockfall 1x7 Galvanized Steel Strand 8-14mm Anchor Cable for Slope Net Systems

Rockfall 1x7 galvanized steel strand, 8mm to 14mm, for anchoring slope nets, barriers and mesh systems where the anchor is buried and never inspected again.

Slope stabilisation anchors are the worst case for maintenance. They are installed once, grouted or pinned into rock and soil, and then covered with mesh, vegetation and time. Nobody will ever inspect the steel again, and nobody will ever re-coat it. The coating on the day of installation is the coating for the life of the structure.

That is why we specify this strand with a heavier coating and a plain seven wire construction. Seven wires are easy to grout around, they grip in a drilled hole with a standard wedge or resin anchor, and the strand does not have fine outer wires that can be damaged against rock during installation. The heavier coating accounts for the fact that part of the anchor is always in disturbed soil and part is exposed at the surface where water runs.

• Heavier coating for a buried life: Two hundred and sixty to three hundred and thirty grams per square metre, chosen because an anchor cannot be re-coated and soil contact is far more aggressive than open air.
• Plain seven wire construction suits grout: A 1x7 strand is compact enough to fit a standard drill hole with a resin or cement grout annulus, and the round profile lets grout surround the steel properly instead of bridging between outer wires.
• Handles installation damage: Coarse outer wires tolerate being dragged over rock, bent around a plate and struck by tools during installation far better than a fine multi wire strand.
• Predictable break load for design: Grade 1570 wire with tested breaking load per lot. Slope designs are calculated on a defined anchor capacity, so the delivered strand must give the designer the figure the design assumed.
• Cut to length with served ends: Anchors are short, and a two kilometre reel is no use on a hillside. We cut to the drawing, serve both ends and bundle by anchor reference so the crew installs from a labelled bundle.
• Works with common anchor hardware: Compatible with wedge anchors, resin anchors, bearing plates and mesh connectors from the usual slope system suppliers. No special fittings needed.

The main use is rockfall net anchoring, drapery mesh pinning, and anchor strand for flexible barrier and attenuator systems on cut slopes and mountain roads.

It is also used in soil nail and micro pile tie applications where a simple tensioned strand is needed, and in erosion control structures where mesh must be held down on an exposed face for decades.

• Rockfall net and drapery mesh anchoring
• Flexible barrier and attenuator anchor strand
• Slope face mesh pinning on road cuttings
• Soil nail and micro pile tie strand
• Erosion control and check dam mesh anchors

Coating mass is measured by stripped weight at both ends of each lot, and breaking load is tested per lot with the fracture position recorded. For buried duty we also check coating continuity by a copper sulphate dip test on samples, since a pinhole in a coating that will never be inspected is a corrosion start point.

Cut lengths are measured individually against the cutting list and the ends are served with stainless wire. Bundles are labelled with anchor reference, length and lot number so the installation record and the test certificates can be matched afterwards.

Cut lengths bundled by anchor reference in timber crates or strapped bundles, or full reels of 500m to 2000m for site cutting. Each bundle carries a waterproof label with length, diameter, breaking load and lot number, because paper labels do not survive a week on a slope.