Q: How do I obtain an hourly rating for a corridor?

A: Below is a list of construction practices used in the industry to obtain an hourly rating for a corridor:

  • If the corridor walls do not go to the deck, find the appropriate UL Design and install the specified fire resistive ceiling and fire resistive grid in corridor ceiling and adjacent areas.
  • If the walls in the corridor run to the deck above, find the appropriate UL Design and install the specified fire resistive ceiling and fire resistive grid in the corridor ceiling; fire damp where walls are penetrated.
  • Install two layers of gypsum board in the corridor ceiling WITH CODE OFFICIAL APPROVAL. or Reference the current 1997 Uniform Building Code section 1004.3.4.3.1 (2), page 1-115 Volume 1.


  The above construction practices should be reviewed with your local Code Official before construction. 

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