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The range of galvanized rope-wire nets are the main components in slope consolidation works. For their versatility and ease of installation they are used in firming rock faces, and in boulder and avalanche barriers.
They are also often used jointly with the galvanized wire-rope net with 80*100 hexagonal mesh with 3 and 2.7 mm double-twisted wires, both draped and fastened on the rock face and coupled to the rope-net panels of the rockfall barrier.
The nets are made on special looms in panels of various sizes, and in rectangular, square or triangular shapes in the case of snow fences, by weaving diagonally a single galvanized rope of 8-mm diameter crossed alternately above and below to form square meshes of 150*150, 200*200, 250*250, 300*300 and 400*400 mm sizes.
The rope crossings are fastened by special steel half-shells (commonly called "knobs") closed by pressure, and the panel is completed perimetrally by a rope, usually of 14 or 16 mm in diameter, which is connected in turn with special pressure-clamped aluminium sleeves.
Two types of products are made:
- one with normal clamping knobs for active protection applications on slopes;
- one with high-strength clamping knobs for rockfall barriers.
All the forces acting on the net, both static in the case of rock faces or dynamic in the case of rockfall barriers, are transmitted to the perimetrical rope, which transfers them in turn to the structural constraints, that is, the anchor points arranged at the ends of the panel.
Any dynamic actions acting on the protection structure are also dampened by the resiliency of the panel and absorbed by the high breaking strength of the various ropes in the structure.
The ropes used are galvanized and in agreement with UNI 7292-74 standard, with a tensile strength of the individual wires of 120 daN/mm2 and 200 daN/mm2.
In areas with an extensive vegetation cover, in order to blend in and limit the impact on the environment, the net panels can be supplied with the ropes painted in different tones of green.
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