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  1. av610

    Sprinklers under underside of OPEN stair run??

    I saw that post and is helpful for the Vertical Opening aspect. However, I am still trying to determine if any protection is needed on the UNDERSIDE of the stair way since it is not enclosed. The first stair landing is at ~6'-10" while the top of the stair will hit the next level at 16'-0"...
  2. av610

    Sprinklers under underside of OPEN stair run??

    I was wondering what kind of protection is needed for the underside of the stairway (attached) if any? The stair run is 4'=6" wide. Thanks

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