4 FM quick reads on security
1. Use Equipment Properly To Ensure Security Success
As external threats to institutional and commercial facilities seem to grow daily, access control and security remain high on the priority lists of maintenance and engineering managers. In addition to specifying the most appropriate doors and door hardware to protect occupants and facilities, managers also need to understand the installation considerations related to security technology, such as video cameras and motion sensors, to avoid equipment failure.
One of the quickest ways to experience failure of any mechanical or electrical device is to install a device intended for interior use outside. Many security devices, including video cameras and motion detectors, are designed and made for interior use only. They will not withstand the extremes in temperature and humidity that weather can bring.
When selecting any of these devices, managers should look for an International Electrotechnical Commission (IEC) 60529 or a National Electrical Manufacturers Association (NEMA) 250 rating.
The NEMA 250 rating system also addresses enclosures resistance to the penetration of solid and liquid materials. But it also addresses such requirements as corrosion resistance, gasket aging, and construction practices that the ingress protection (IP) codes do not address. So while it is possible to select NEMA ratings that satisfy or exceed the IP code criteria, it is not possible to select IP codes that meet or exceed any given NEMA rating. Still, managers can use some rules of thumb to better select equipment suitable for indoor or outdoor use. Generally, equipment that is rated IP20 or NEMA 1 is intended for installation in a climate-controlled environment. Equipment that is suitable for exterior installation should have one of the following NEMA or IEC ratings: IP54 or NEMA 3 or 3R; IP65 or IP66 or NEMA 4 or 4X; IP67 or NEMA 6; or IP68 or NEMA 6P.
When specifying equipment for exterior applications in corrosive environments, managers must go beyond the IEC 60529 ratings. Saltwater or marine environments are corrosive environments for some equipment. Security devices installed within 12 miles of a coastline probably should be rated for a corrosive environment or enclosed in a housing designed to protect equipment from a corrosive environments.
Managers can purchase video cameras, motion detectors, and other standalone security devices in enclosures that are rated IP65/66 or NEMA 4/4X, and they require nothing more than a sunshield. But in some cases, managers need to install equipment intended for interior use in exterior locations to support the security system. This equipment might include fiber optic converters, network switches, and power over Ethernet injectors.
4. Security Film Offers Options For Windows
Today's tip is to consider security film for windows. Window security film is very different from solar film. Though some security film will block solar radiation, its primary purpose is to prevent shards of flying glass from injuring occupants if the window breaks.
At 4 to 14 mil, security film is significantly thicker than solar control film, which is generally 1.5 to 2 mil thick. While solar control film is applied only to the part of the window that is visible, security film is installed into the window system itself by a process known as anchoring.
Two types of anchoring are available, known as wet-glazed and mechanical installations. A wet-glazed installation involves removing the rubber around the window from the gasket and replacing it with a structural silicon sealant that fills the space between the window and the frame. A mechanical attachment involves overlapping the film around the edges of the window and securing the film with bolts to an internal frame. Both methods are meant to ensure that the film will hold glass fragments together and to prevent the entire window unit from becoming dislodged and sent into a building’s interior.
Shattered glass can be a risk to buildings that may not be a target for a bomb blast, but are in the vicinity of a building that is. If a threat assessment shows high-profile targets nearby, applying security film to the windows might make sense to protect against residual blast effects.
The value of security film has been recognized by the federal government, especially after 9/11, says Daniel Leclair, a security consultant with SAKO Associates. "All government buildings have some type of window film or protective glazing on the windows," Leclair says. "The majority of federal buildings have wet-glazed film application as a requirement.”
Security film is also a recognized benefit in hurricane-prone areas like Florida. The Protecting People First Foundation studied the performance of window film during recent hurricanes. Among the findings: In one high-rise condominium, some windows were protected by 8 and 12 mil security film; others had no film. None of the windows that had film were damaged, while some unprotected windows did sustain damage.
Most manufacturers' warranties are for five to 10 years. Check not only the length of the warranty, but also whether it covers removal of any failed product and reinstallation.
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