A sheath for constructing a reinforced concrete pile, characterized in that the sheath is formed by at least one circular knit comprising having a series of meshes helically positioned so as to form a pipe. A method for constructing a reinforced concrete pile includes excavating to form a well, inserting one end of a reinforcing rod in a sheath, positioning the sheath on an area of the rod and introducing the rod into the well, installing a tremie pipe inside the rod, and filling the well with concrete using the tremie pipe.

A sheath for constructing a reinforced concrete pile, characterized in that the sheath is formed by at least one circular knit comprising having a series of meshes helically positioned so as to form a pipe. A method for constructing a reinforced concrete pile includes excavating to form a well, inserting one end of a reinforcing rod in a sheath, positioning the sheath on an area of the rod and introducing the rod into the well, installing a tremie pipe inside the rod, and filling the well with concrete using the tremie pipe.

The present invention relates to a machine and to a method for producing uniaxial reinforcing steel bar meshes, in particular for uses with not predominantly static load, wherein reinforcing wires are fastened to support strips by means of individual wire tying.

The present invention relates to a machine and to a method for producing uniaxial reinforcing steel bar meshes, in particular for uses with not predominantly static load, wherein reinforcing wires are fastened to support strips by means of individual wire tying.

A device for manufacturing a weave, including a winder for reeling the manufactured weave to a rotating reel, wire spools arranged to release longitudinal wires to said winder, a wire spool carrier comprising a wheel and a slit extending through the wheel from a centre of the wire spool carrier to the circumference, an additional wire spool releasably attached to the wire spool carrier and arranged to release a crossing wire, and an actuator configured to move the wire spool carrier between the longitudinal wires such that the additional wire spool in turns moves to each longitudinal wire to a position where the respective longitudinal wire is located in said slit at which stage the wheel rotates around said respective longitudinal wire before moving towards a following longitudinal wire in such way that a predetermined path of the crossing wire from the additional wire spool forms the weave with the longitudinal wires from the wire spools.

A hexagonal wire netting (7), a process for manufacturing such a wire netting and a device for manufacturing a hexagonal wire netting (7), the device comprising an assembly of tubes (5) for leading the wires (1) of which every other is twisted into a spiral shape, a spindle (6) assembly and a drum (8) receiving the wire netting (7), the drum (8) being provided with &tent elements (21). Between each tube (5) leading the spirally twisted wire (I) and the cooperating spindle (6) a straightening guide (IO, IO′) is located having an inlet opening (13, 15) cooperating with the tube (5) and an outlet opening (12, 20) cooperating with the spindle (6). The detent elements (21) are arranged on the drum (8) in such a way that the produced wire netting (7) has meshes in which the proportion of the width (A) to the length (B) is less than 0.75.

A hexagonal wire netting (7), a process for manufacturing such a wire netting and a device for manufacturing a hexagonal wire netting (7), the device comprising an assembly of tubes (5) for leading the wires (1) of which every other is twisted into a spiral shape, a spindle (6) assembly and a drum (8) receiving the wire netting (7), the drum (8) being provided with &tent elements (21). Between each tube (5) leading the spirally twisted wire (I) and the cooperating spindle (6) a straightening guide (IO, IO′) is located having an inlet opening (13, 15) cooperating with the tube (5) and an outlet opening (12, 20) cooperating with the spindle (6). The detent elements (21) are arranged on the drum (8) in such a way that the produced wire netting (7) has meshes in which the proportion of the width (A) to the length (B) is less than 0.75.

Fence mesh including line wires, and stay wires extending laterally across and intersecting the line wires to form a mesh, wherein a first type of wire knot is formed by a knot wire around the line wire and stay wire at intersections of the stay wires with the line wires in a primary zone, and wherein a second type of wire knot is formed by a knot wire around the line wire and stay wire at intersections of the stay wires with the line wires in a secondary zone, characterised in that the first type of wire knot is different from the second type of wire knot; and a machine for the formation of such a mesh.

Fence mesh including line wires, and stay wires extending laterally across and intersecting the line wires to form a mesh, wherein a first type of wire knot is formed by a knot wire around the line wire and stay wire at intersections of the stay wires with the line wires in a primary zone, and wherein a second type of wire knot is formed by a knot wire around the line wire and stay wire at intersections of the stay wires with the line wires in a secondary zone, characterised in that the first type of wire knot is different from the second type of wire knot; and a machine for the formation of such a mesh.

A metal net having entwined metal wires defining the meshes of the metal net comprises at least one elongate sensor element fixed integrally to the metal net, inserted into the net during the production thereof. The elongate sensor element may comprise a wire of a material having a low coefficient of variation of the resistivity and a high gauge factor, preferably formed from constantan, or else may be of the optical fibre or composite fibre type.