Printed from the blog of Lori Greene, AHC/CDC, CCPR, FDAI
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Mar 04 2009

Job-Site Preparation of Fire Doors

Category: Fire DoorsLori @ 1:01 pm Comments (3)

This morning a customer asked about using continuous hinges to change the hand of a pair of rated doors (inswing to outswing), in an equal rabbet frame.  I couldn’t think of any objections – the existing hinge preps would be filled with steel fillers in compliance with NFPA 80.  The continuous hinges wouldn’t require a hole greater than the maximum 1″ diameter allowed by NFPA 80.  I checked with Steelcraft to see if our frames need to be reinforced for continuous hinges when used in a rated application, and the answer was no.  So…although the AHJ always has the final say in the matter, I can’t think of one reason you can’t do this as long as it is an equal rabbet frame.

Here’s the text from NFPA 80 – 2007 and 2010 regarding job-site preparation: For job site preparation of surface-applied hardware, function holes for mortise locks, and holes for labeled viewers, a maximum 3⁄4 in. (19 mm) wood and composite door undercutting, and protection plates (see 6.4.5) shall be permitted. Surface-applied hardware shall be applied to the door or frame without removing material other than drilling round holes to accommodate cylinders, spindles, similar operational elements, and through-bolts in doors. The holes described in shall not be permitted to exceed a diameter of 1 in. (25.4 mm) with the exception of cylinders.

3 Responses to “Job-Site Preparation of Fire Doors”

  1. Jerry Rice says:

    What do you do when/if the ‘full mortised’ cont hinge covers up the label that is supposed to stay visible to the AHJ on the frame?


  2. clifton says:

    Use a Select SL57HD Surface to Surface mount type

    If there is an illuminated “EXIT” sign above the opening and you are going from Out-swing to In-swing? That would be considered a “FIRE-TRAP” It’s never an issue going from In-swing to Out-swing Unless your talking about Balcony and/or Courtyards. EXIT sign above means Push doors open….

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