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Vertical bar fencing has been the most popular form of perimeter security fence since the 1980s. Since the 2000s, welded wire mesh and acoustic barriers have also become popular types of perimeter fence around the world. Vertical bar, acoustic barriers and welded mesh are used in commercial projects and landmarks, [1] and transport hubs. [2]
Chain-link fencing showing the diamond patterning A chain-link fence bordering a residential property. A chain-link fence (also referred to as wire netting, wire-mesh fence, chain-wire fence, cyclone fence, hurricane fence, or diamond-mesh fence) is a type of woven fence usually made from galvanized or linear low-density polyethylene-coated steel wire.
Close boarded fencing, strong and robust fence constructed from mortised posts, arris rails and vertical feather edge boards; Composite Fencing, made from a mixture of recycled wood and plastic; Expanding fence or trellis, a folding structure made from wood or metal on the scissor-like pantograph principle, sometimes only as a temporary barrier
Wire or "Hampshire" gate. As with any fence, barbed wire fences require gates to allow the passage of persons, vehicles and farm implements. Gates vary in width from 3.5 metres (12 ft) to allow the passage of vehicles and tractors, to 12 metres (40 ft) on farm land to pass combines and swathers.
Physical security systems for protected facilities can be intended to: [2] [3] [4] deter potential intruders (e.g. warning signs, security lighting); detect intrusions, and identify, monitor and record intruders (e.g. security alarms, access control and CCTV systems); trigger appropriate incident responses (e.g. by security guards and police);
In the context of a perimeter fence, [10] MEMS sensors can be attached to the fenced area. These sensors could detect changes in pressure or vibration caused by someone attempting to climb over or cut through the fence. The sensors then transmit an alert to a security system, allowing security personnel to respond quickly to the attempted breach.
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