Abstract: A barrier structure includes a continuous piece of elongated metal tape. The metal tape includes barbs spaced along an elongate body. Each of the barbs is connected securely to a barb root, and each barb root is connected securely to the elongate body. A first region of the elongate body is adjacent to each barb root, and a second region of the elongate body is adjacent to each first region distal from the barb root. A third region of the elongate body adjacent to each second region distal from the first region extends lengthwise from each second region and meets a corresponding third region that is extending lengthwise away from another second region. Each second region extends transversely and inwardly from the adjacent first region and the adjacent third region.

Abstract: A helical barbed tape includes barbs with enhanced rigidity, as well as an electrical sensor wire extending along the length of the helical barbed tape so as to be capable of use in an electronic intrusion detection system to mechanically detect disturbances induced on the barbed tape or its supporting structure.

Abstract: A defensive personnel barrier and method for fabrication thereof includes an elongated metal strip having a longitudinally extending bend therein to form a spine extending therealong with laterally opposed flanges extending obliquely from the spine. Each flange is stamped or die cut to provide a plurality of cuts spaced therealong and extending diagonally from the spine to the outer edge of the flange. The diagonally cut portions are bent upwardly from the plane of the flange to form a plurality of barbs spaced longitudinally in the metal strip. The barbs of the opposed flanges are staggered longitudinally, and the edges of the barbs are sufficiently sharp to discourage manual grasping of the strip. One or more strips may be secured atop a fence or similar barrier to discourage climbing thereon. The barrier strips may also be secured to existing linear barbed wire strands by means of a saddle block and J bracket assembly provided by the invention.