Abstract: A metal tape barrier is constructed of straight sections of elongated tape having barbs formed at spaced intervals along the tape. The barrier has a triangular configuration in cross section with the sections of tape forming the legs of the triangle. Adjoining convolutions of the barrier are connected together at spaced points in such a manner that the tape sections assume accordian pleat-like configurations when the barrier is stretched lengthwise for installation. A second set of sections of tape may be added to the barrier and may have their ends connected to intermediate regions of the sections forming the legs of the triangle. This second set of tape sections are disposed to close off the inside of the main triangle of the barrier. Connections to end regions of the tape sections are made at the location of the barbs on the tape so that the barbs project beyond the connections. In one configuration the barrier has a cross section like an isosceles triangle.