HEXAGONAL DOUBLE TWIST WIRE MESH

Among the various kinds of wire produced wire mesh, hexagonal double twisted was chosen as the best one for the structural needs of gabions:

	The HEXAGONAL SHAPE of the mesh provides a better distribution of the working tensions along the wires that form the mesh. Mesh resistance to tension along its transversal direction (to the twists) is approximately 50% less than that in its longitudinal direction, parallel to the twists
	Double twist avoids spreading of the damage caused by the accidental breaking of any wire or mesh

ZINC AND PVC COATED WIRE MESH

TENSILE STRENGTH tensile strength of 38-50 kg/mm2 according to EN 10223-3. Above values are referred to wire before manufacturing mesh. ELONGATION shall not be less than 10%. ZINC COATING minimum quantities of zinc meet the BS 443/82 and exceed the ASTM A641-71 A, DIN 1548, QQ-W-461 H.

ZINC ADHESION
the adhesion of the zinc coating to the wire should be such that, when the wire is wrapped six turns round on a mandrel having four times the diameter of the wire, it does not flake or crack when rubbing it with the bare fingers.

PVC COATING
In aggressive environments (2<pH<13) in addition to the galvanization, the steel wire can be coated with a PVC sheath of a nominal thickness of 0.50 mm.

DOUBLE TWISTED HEXAGONAL STEEL WIRE MESH

Many kind of double twisted wire mesh are manufactured combining different diameter of wire and type of mesh. In this way different fill are allowed and different strength of the structure can be achieved

IMPORTANCE OF THE WIRE MESH QUALITY

Any lacing procedure is made along the border of the gabion base panels. This means that the most critical point of a gabion structure is the joints between the different portions of the same wire mesh base panel and between adjacent units.
All the existing international specifications make reference to a “edging” and “selvedging” wire with a diameter bigger of the one’s of the mesh totally inglobed in the wire mesh. In particular the selvedging wire has to be totally wrapped by the cut portion of the wire mesh: this result cannot be obtained with a manual operation, but only by a mechanical industrial production.

PRODUCTS AND APPLICATIONS

GABIONS Gabions are rectangular cages made of hexagonal double-twist wire mesh filled with appropriately sizes cobbles or quarry stones. In order to reinforce the structure, all edges are selvedged with a wire having greater diameter. The gabion is divided into cells by means of diaphragms positioned at 1 m centres

RENO® MATTRESSES

Reno® mattress is a large and thin structure, made of hexagonal double twisted wire mesh; the mattress is divided into cells by panels positioned at 1 m centres. The assembled mattress will be filled with appropriately sizes cobbles.