Security doors

The primary attribute for the security of a door is its strength. Many security doors are 4-20 gauge hollow metal doors consisting of steel plates over a hollow cavity reinforced with steel stiffeners to give the door extra stiffness and rigidity. This increases resistance to blunt force used to try to penetrate through the door. The space between the stiffeners may be filled with specialized materials to provide fire, blast, or bullet resistance to the door. 

Many security doors can be retrofit into existing frames however, many security door installations include replacing the door frame as well as the door itself. For example, bullet resistance per Underwriters Laboratories (UL) 752 requires resistance of the door and frame assembly, and thus replacing the door only would not meet UL 752 requirements. 

The access control of controlled radiological areas has been strengthened by the installation of persoimel security doors (of air-lock chamber type) replacing turnstiles used in previous installations. 

Using them simultaneously ensures the uniqueness of passage and biometric identification. Indeed, each security door comprises an iris recognition system verifying the correspondence between the iris of a person located inside the security door and the user s badge. 

The equipment security doors allow introduction and removal of the equipment in the LHC. The passage of personnel through these security doors is strictly forbidden. A human detection system using a camera verifies compliance with this safety condition. 

Figure 12.4 illustrates an LHC access point, composed of two personnel secmity doors and one equipment security door. 

The first function locks all IIS access to avoid any intrusion (personnel and equipment security doors, LHC sector door). To close and lock these IIS, the LASS orders relay to cut off the power supply or the control of actuators opening the IIS. 

The second function provides continuous monitoring of all IIS Access (personnel and equipment security doors, sector door, mobile shielding wall, end of zone door, etc.). On detection of a non-safe position of even just one of these IIS Accesses, the function stops the circulating beams, and prevents all further beam injection. 

Prevention of arson Control access at all times Screen employees and casual labour Lock away flammable substances and keep combustibles away from doors, windows, fences Provide regular fire safety patrols, even where automatic systems are provided Secure particularly storage and unmanned areas... 

Ensure CTU doors are properly secured Learn emergency procedures Ensure availability of appropriate personal protective equipment as advised in transport documentation, and suitable fire extinguisher Check sides and ends of CTU are placarded appropriately... 

Connecting a control computer to another system is a modification and should only be carried out after systematic study of possible consequences (see Section 20.4.3). If made, data flow should be possible only in the outward direction (see text through the end of this section). All systems should be secure. Houses need doors. The doors on control systems are less tangible than those on houses but just as important. 

The security system can be considered as layers of protection. Physical barriers and deterrents constitute not only the building stmcture itself, made up of walls, doors, windows, floor and a roof, but the yard around the building and probably a perimeter fence or wall. 

External doors and shutters are often the focus of criminal attention. The range and construction of doors, shutters and their securing devices is too numerous to cover but the points which need to be considered are ... 

In many cases, it is necessary to complement physical security by the installation of an intruder alarm system in order to achieve the standard of security commensurate to the risk exposure. The scope of protection to be afforded by the alarm system depends on the security risk, but it may embrace fences, windows, doors, roofs, walls, internal areas, yards and external open areas, and vehicles inside and outside buildings. There is a comprehensive range of detection devices, but the choice of detector is critical to ensure that it provides the desired level of protection and is stable in the particular environment. 

Dr. ter Meer was not at the Vermittlungstelle Wehrmacht as the security clerk shut the doors of the safe, twirled the combination, tested the lock — measures in which Judge Morris was "not greatly interested" and which Dr. ter Meer believed to be "greatly ex-... 

Europe has been the biggest market up to now. Future applications will be in environmental protection and security e.g. water-meters and door detection devices. We expect an increase of appr. 15% p.a. The US market shows a delayed response. It might reach the present-day European level of appr. 25 million reed sensors p.a.in 10 years time. Asia the market is growing at an above-average rate. We expect annual increases of 20%. 

The ambitious goal of eBuilding is to maximize the comfort of the house owner at a minimum cost level. This will be achieved by using sensors in all sensitive areas, for instance, constant control of the air-conditioning or to cut off cost intensive peaks. Also sensors in smoke-detectors, windows, doors and other appliances will take care of the house security. 

Physical security Security systems and architectural features that are intended to improve protection. Examples include fencing, doors, gates, walls, turnstiles, locks, motion detectors, vehicle barriers, and hardened glass. 

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