NFPA 80, 2013 edition, now requires sleeves to be installed through the wall to provide an open pathway for the cable or chain connecting the fusible links where there are fusible links located on both sides of a wall. This change originated with a Tentative Interim Ammendment that was issued on NFPA 80, 2010 edition, in October 2010.
Rolling steel fire door manufacturers have become aware of an increasing trend towards more frequent and recurring questions from AHJ’s regarding the correct installation of wall sleeves for through-wall fusible links. Sleeves are referred to, but the method of installing such wall sleeves, prior to the 2010 and 2013 edition, was inadequately documented in NFPA 80. This matter was also outside the scope of listing agencies, as they regulate the manufacturing – but not the installation – of fire door products. The new language provides the necessary guidance needed for the installation of these sleeves to ensure that connected fusible links will operate properly under fire conditions and the opening will be protected as needed.
Finally, the incorrect installation of a sleeve, or attempt to seal it, can create the potential for a life threatening condition resulting from a fire door being prevented from automatically closing.
The revision adds new sections 18.104.22.168.1 and 22.214.171.124.2 along with a new annex language to provide additional guidance for users of NFPA 80.