there is probable a building/local/county/city/state/fire code that states it must be independently tethered to structure in addition to the grid supportI am installing some Cisco Wireless Access Points and they come with brackets that attach to the suspended ceiling's grid. A coworker expressed they needed to be tethered to the structure above the ceiling, in addition to mounting to the grid. Is this true? I have been unable to find the area of NEC 2005 (our State uses that guide) that covers this topic. Others have indicated that those supports are adequate and no additional support mechanisms are needed or required by law.