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3hr HM Door and Frame in Wood Construction

Question asked by dmacpherson on Jul 9, 2019
Latest reply on Sep 27, 2019 by dmacpherson

I am looking for standards related to NFPA 80 (ideally NFPA or UL Designs) for 3-hour rated hollow metal doors and frames built into wood construction. We have been using ASW 2600 by the Gypsum Association together with two 3 hour wood framed walls (essentially 3 walls stacked together) using break away clips to allow each outside wall to collapse independently in a fire event. Overall the wall assembly is 15 to 18 inches thick.  I am updating the specification requirements for the hollow metal frames and door hardware. Most HM frame manufacturer information is for CMU walls, not wood. Any assistance is greatly appreciated. Thank you