Abstract: An antipersonnel barrier system includes at least one concertina coil and a plurality of spaced support members. Each of the support members includes a base section and a vertical section. Each of the concertina coils is secured to the support members to provide a horizontally and vertically stabilized barrier. A length limiting cable is provided to limit the length of spacing between adjacent support members. The support members can include anchoring structure for securing the support members to a support surface. In one embodiment, the concertina coils include two small diameter base coils and a top coil positioned on the base coils.

Abstract: A non-metallic fence system has a singular snap lock mechanism for permitting the easy construction of the fence.

Abstract: A fence and an installation method for a fence or other laterally extending structure, the installation method comprising in one embodiment: obtaining a trench in ground, the trench extending laterally with a top of the trench having a first opening width, and having a first bottom surface; obtaining a hole in the first bottom surface of the trench with an approximate diameter that is at least fifty percent smaller than the first opening width; installing a support post in the hole to extend up above the top of the trench; disposing laterally extending panels at substantially the first bottom surface of the trench and attaching them to approximately opposing ends of a diameter of the post to thereby create a void volume between the panels at least on one side of the post; installing at least one retainer connecting to the panels across the void volume; and filling the void volume with stones or other fill material.

Abstract: Barbed tape made from an elongated metal strip having a plurality of pairs of barbs formed along the edges thereof and the portion of the strip forming each barbed pair has a second pair of barbs formed therein. The first pair of barbs extend in opposite directions away from each other and the second pair of barbs extend in opposite directions but toward each other. The second pair of barbs serve to retain articles impaled on the first pair of barbs.

Abstract: A barbed tape is disclosed incorporating an improved barb configuration. A flat metal tape is formed having opposed barbed pairs that extend from a central portion at an angle to thus point the tips of the respective barbs away from the longitudinal axis of the tape. The central strip of the tape is clenched about a central core wire; intermediate barbs are provided to increase the effectiveness of the barrier while providing a means for positively positioning clips that are used to secure adjacent coils of the tape together.