Abstract: The clamp, operable to compressively lock a wire, comprises a casing having a cone-shaped cavity therethrough, and means engaging the cavity about the wire, the means gripping the wire as a result of constriction of the cone-shaped cavity as a result of loads applied to the wire.

Abstract: The barrier comprises a pair of panel sections including a rectangular framework, the panel sections being selectively locked in a straight, linear configuration by a dagger selectively extensible through apertures in the end members and through aligned panel sections; extensible sections each having a pair of rials which may slidably telescope within the rectilinear members at their ends opposite the hinge, means selectively locking the extensible sections with the panel sections, carried on rectilinear members and rails thereof; and abutment bars fastened at the outermost terminal ends of the rails.