28 00 00 Electronic Safety and Security 28 05 00 Common Work Results for Electronic Safety & Security 28 08 00 Commissioning of Electronic Safety & Security 28 10 00 Electronic Access Control and Intrusion Detection 28 13 00 Access Control 28 13 53 Security Access Detection 28 16 00 Intrusion Detection 28 20 00 Electronic Surveillance 28 23 00 Closed Circuit Video System

27 00 00 Communications 27 51 10 Sound Systems 28 00 00 Electronic Safety and Security 28 10 10 Security & Intrusion Systems, CCTV 27 15 00 Communications Horizontal Cabling 27 40 00 Audio-Video Communications 27 51 30 Building Paging and Intercom System 28 00 01 Access Control 28 16 00 Intrusion Detection 28 31 00 Fire Alarm Systems