Abstract: A barrier for restriction of passage across or through a body of water, the barrier including a plurality of interconnected buoyant bodies which are spaced apart from one another in a longitudinal array, a plurality of deterrent components on or between the buoyant bodies and obstructive material which in use extends downwardly from the buoyant bodies.

Abstract: A security grid structure comprising two spaced elongate channel sections with side walls which are formed with spaced apart apertures, and elongate members each of which extends through associated apertures in the side walls, and at least one elongate element which extends transversely to, and which is secured to, the elongate members.

Abstract: A mast (10) which includes an elongate post (12) with a first end (14) and a second end (16), the first end (14) being pivotally secured to a ground-engaging support base, at least a first mechanism (22) to restrict pivotal movement of the post (12), a winch (26) which is attached to the post (12), and a cable (28) which is engaged with the winch (26) and which is secured at one end to an anchor (30), wherein the winch (26) is actuable to allow the post (12) to pivot, from an elevated position, in a first direction (54) which lowers the post (12) against the action of the movement restricting first mechanism (22), and which is actuable to pivot the post (12) in a second direction (56) which opposes the first direction (54) to elevate the post (12).

Abstract: A security grid structure comprising two spaced elongate channel sections with side walls which are formed with spaced apart apertures, and elongate members each of which extends through associated apertures in the side walls, and at least one elongate element which extends transversely to, and which is secured to, the elongate members.

Abstract: A fence panel comprising a rectangular sheet of mesh material with opposed first and second edges, and opposed third and fourth edges, the sheet being formed with a plurality of spaced apart and parallel channel-shaped reinforcing formations, and a plurality of deterrent components each of which includes an elongate strip of projecting spikes fixed to at least one side of the mesh sheet.

Abstract: An infill fence panel having a body which made from a mesh material and which has a first edge and a second edge opposing the first edge. The second edge forms an included acute angle with the first edge such that the body, from one side, has a wedge shape. The first edge is located on, and is fixed to, an upper edge of a primary panel which is of rectangular form and made from a mesh material.

Abstract: A barrier comprising deterrent material including an elongate core wire, and an elongate strip which encloses a part of the core wire, a first elongate portion of the strip which projects as a first elongate flange and a second elongate portion of the strip projects as a second flange, wherein the first flange is formed with a first set of first corrugated formations comprising alternating first channels and first ribs which extend laterally relative to the core and the second flange is formed with a second set of second corrugated formations comprising alternating second channels and second ribs which extend laterally relative to the core, the deterrent material being formed into a plurality of helical coils which extend around a central elongate axis and wherein the first and second flanges extend transversely relative to the elongate central axis.

Abstract: A base for a subterranean fence post which includes a body with a ground-engaging surface and a mechanism for mounting a lower end of the fence post to the body wherein a footprint of the surface is sufficient to provide lateral support to maintain the post in an upright orientation and a mass of the body is sufficient to stabilize the upright post.

Abstract: A barrier for restriction of passage across or through a body of water, the barrier including a plurality of interconnected buoyant bodies which are spaced apart from one another in a longitudinal array, a plurality of deterrent components on or between the buoyant bodies and obstructive material which in use extends downwardly from the buoyant bodies.

Abstract: An infill fence panel having a body which made from a mesh material and which has a first edge and a second edge opposing the first edge. The second edge forms an included acute angle with the first edge such that the body, from one side, has a wedge shape. The first edge is located on, and is fixed to, an upper edge of a primary panel which is of rectangular form and made from a mesh material.

Abstract: A fence panel comprising a rectangular sheet of mesh material with opposed first and second edges, and opposed third and fourth edges, the sheet being formed with a plurality of spaced apart and parallel channel-shaped reinforcing formations, and a plurality of deterrent components each of which includes an elongate strip of projecting spikes fixed to at least one side of the mesh sheet.

Abstract: A base for a subterranean fence post which includes a body with a ground-engaging surface and a mechanism for mounting a lower end of the fence post to the body wherein a footprint of the surface is sufficient to provide lateral support to maintain the post in an upright orientation and a mass of the body is sufficient to stabilize the upright post.