Abstract: A pair of spaced elongate primary security members extend in a first direction, and each has a plurality of longitudinally spaced openings. The ends of a plurality of elongate secondary security members, extending in a second direction which is transverse to the first direction, are located in aligned openings in the primary security members. The ends of the secondary security members are thereby held captive in the primary security members. The secondary security members span a space between the primary security members, and the secondary security members are thus spaced apart from one another. A tertiary security member supports the secondary security members between the primary security members. An electrically operable burglar protection system, having an alarm, is connected to the security members.

Abstract: A security installation for a property includes an imperforate protective barrier, a plurality of spaced posts extending upwardly from the top of the barrier and a plurality of spaced trip wires extending between the posts for detecting the presence of an intruder breaching, or attempting to breach, the barrier. The installation further includes a plurality of spaced posts protruding transversely from the inner side of the barrier, and a plurality of electrical wires extending between the posts. The electrical wires are adapted to impart at least a temporarily incapacitating shock to an intruder.