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Fire Alarm Cut Off
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<blockquote data-quote="Brad Weber" data-source="post: 92766" data-attributes="member: 114"><p>Re: Fire Alarm Cut Off</p><p></p><p></p><p>Mike, while I agree with you in regard to the design and installation of the actual life safety systems, I should note that in almost 30 years including 7 years with a design firm that also designed life safety systems I have yet to encounter the issues or qualifications you note in regards to interfacing to other audio systems. The systems providing the contact closure or other input may need to be monitored, installed by a properly licensed fire alarm contractor, etc. but in numerous projects with many different designers, contractors and AHJ I have never seen that extended to the actual muting or power control for other audio, that aspect has always been handled by the audio/AV designer and contractor. In fact, I am usually the party to broach the topic as most life safety consultants and contractors seemed oblivious to it and to have no clue of what to do.</p><p></p><p>Just to be clear, there are apparently two basic approaches to commercial/professional AV and audio integrating with life safety and ECS systems. One is an integrated approach where portions of a system serve dual purpose for both AV/audio and ECS, in which case many, but not necessarily all, of the issues noted may apply. The more traditional concept is where the life safety system is separate from the audio/AV systems and simply disables the audio and/or AV systems in such a way that they do not interfere with the proper operation or functionality of the life safety system. The latter seems to be the approach addressed here.</p><p></p><p>An interesting note, when NFPA 72 first starting addressing STI-PA and CIS requirements one of the dilemmas identified was that most licensed and otherwise qualified life safety contractors were not trained to or qualified to address the design of such systems, that expertise actually tended to lie greatly with commercial acoustical and audiovisual consultants and contractors. More recent versions of NFPA 72 have recognized the potential value of integrating commercial AV parties and products into life safety and especially ECS.</p></blockquote><p></p>
[QUOTE="Brad Weber, post: 92766, member: 114"] Re: Fire Alarm Cut Off Mike, while I agree with you in regard to the design and installation of the actual life safety systems, I should note that in almost 30 years including 7 years with a design firm that also designed life safety systems I have yet to encounter the issues or qualifications you note in regards to interfacing to other audio systems. The systems providing the contact closure or other input may need to be monitored, installed by a properly licensed fire alarm contractor, etc. but in numerous projects with many different designers, contractors and AHJ I have never seen that extended to the actual muting or power control for other audio, that aspect has always been handled by the audio/AV designer and contractor. In fact, I am usually the party to broach the topic as most life safety consultants and contractors seemed oblivious to it and to have no clue of what to do. Just to be clear, there are apparently two basic approaches to commercial/professional AV and audio integrating with life safety and ECS systems. One is an integrated approach where portions of a system serve dual purpose for both AV/audio and ECS, in which case many, but not necessarily all, of the issues noted may apply. The more traditional concept is where the life safety system is separate from the audio/AV systems and simply disables the audio and/or AV systems in such a way that they do not interfere with the proper operation or functionality of the life safety system. The latter seems to be the approach addressed here. An interesting note, when NFPA 72 first starting addressing STI-PA and CIS requirements one of the dilemmas identified was that most licensed and otherwise qualified life safety contractors were not trained to or qualified to address the design of such systems, that expertise actually tended to lie greatly with commercial acoustical and audiovisual consultants and contractors. More recent versions of NFPA 72 have recognized the potential value of integrating commercial AV parties and products into life safety and especially ECS. [/QUOTE]
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