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Why Security and What Is It?
The Three Lines of Defense
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activated adequate amount barbed tape barrier bolt building bulb burglary camera circuit closed-circuit television combination lock considered construction container cost cylinder designed detection detectors devices discussed effective electrical electronic employee entrance entry equipment example explosion facility factor feet fence Figure file room fire protection fire-resistive Floodlight Type floor fluorescent lamps footcandle footlamberts gate glass heat illumination incandescent individual inside installed Insurance Services Office interior intruder key lock lamps lever tumbler lock line of defense located lock luminaires luminous flux master key material minicomputer money safe normally operation parking lots penetration perimeter physical controls pin tumbler lock properly protective lighting rebar records reinforced concrete result security and fire security control center security personnel sensors signal standard steel Streetlight Type surface switch temperature thick tion tumbler Type III Streetlight Underwriters Laboratories unit usually utilized vault door walls wire