As they make their rounds, guards check all doors and windows, see that no unauthorized persons remain after working hours, and ensure that fire extinguishers, alarms, sprinkler systems, furnaces, and various electrical and plumbing systems are working properly. They sometimes set thermostats or turn on lights for janitorial workers. Guards usually are uniformed and may carry a nightstick and gun, although the bearing of guns is decreasing. They also may carry a flashlight, whistle, two-way radio, and a watch clock a device that indicates the time at which they reach various checkpoints. Correction officers guards who work in prisons and other correctional institutions are discussed separately in this section of the Handbook.
Guards check the credentials of persons entering or leaving a building.
Working Conditions Guards work indoors and outdoors patrolling buildings, industrial plants, and grounds. Indoors, they may be stationed at a guard desk to monitor electronic security and surveillance devices or to check the credentials of persons entering or leaving the premises. They also may be stationed at gate shelters or may patrol grounds in all weather. Because guards often work alone, there may be no one nearby to help if an accident or injury occurs. Some large firms, therefore, use a reporting service that enables guards to be in constant contact with a central station outside the plant.