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          I opened the door to enter the office building lobby. The sound was loud and unmistakable - an electrical transformer humming away, loudly. Following the sound I found the room about 20 feet away with the door propped open to help ventilate the transformer.

          Electric Room doorThe photo shows a simple steel louver in the door for ventilation, too. Obviously it was not enough to keep the temperature of the electrical room within perceived acceptable limits. The door may have been propped thinking lower temperature would help reduce the humming. For power transformers, the hum is mechanical in nature caused by the core laminations when magnetized. Time and increased temperature can weaken the laminations causing the hum to increase. Additional cooling will not reverse lamination damage, nor reduce the hum.

          The humming and temperature were not the only difficulty with this room. The hollow metal door and frame are both fire rated. The rating is unknown because the labels were painted over. And the louver in the door was not a fire rated louver. So the fire rating of the exit access corridor is compromised by this electrical room door, even without being propped open.

          The International Building Code (IBC) references NFPA 80 (2007) - Standard for Fire Rated Doors and Other Opening Protectives as the standard for fire rated doors. In the 2007 edition of NFPA 80, annual fire door inspection was added to the standard.

          This door is the poster child for why annual inspections are necessary.

          Reflections of 30 Years | Conspectus

          Reflections of 30 Years

          The journey was an interconnected path, nearly 50 years in the making. Any one change could have dramatically altered the outcome. In the end I am...

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          Understanding Spec Tools - Advice from a Specifier

          Read the fine print, especially when changes are being made to a platform or tool that has a new release.  We highly encourage you to read the fine...

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          Rules of the Game: FIFA vs AEC, *Blog Bonus: World Cup Stadium Spec Secrets

          We are heading into the final game of the 2022 World Cup, and folks are placing their bets on Argentina or France. I want to take this opportunity to...

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