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Thread: Aggregate Horizontal Projections

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  1. Default Aggregate Horizontal Projections 
    #1
    Join Date
    Oct 2012
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    48
    What is the meaning of Aggregate Horizontal Projection?Fire safety code mentioned this in the sprinkler section.
    Last edited by Adam Calhoun; 09-29-2013 at 08:59 PM.
    http://limbohaunt.com
    Twitter: @LimboHaunt
     

  2. Default  
    #2
    Join Date
    Aug 2006
    Location
    Nashville
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    327
    Pretty sure it means your sprinklers will cover everything on a horizontal pattern. Heads are not blocked by props and temp walls that wouldn't allow complete spray coverage.
     

  3. Default  
    #3
    Join Date
    Oct 2012
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    The question was in reference to NFPA 101" Specialty Amusement Automatic Sprinkler's. Every special amusement building,
    other than buildings or structures not exceeding 10 ft (3050 mm) in height and not exceeding 160 ft2 (15 m2) in aggregate
    horizontal projection, shall be protected throughout by an approved, supervised automatic sprinkler system"

    My question at hand is actually, Do I need sprinklers or not. As in an instant if I didnt exceed 160ft in aggregate horizontal projection.



    Hope that maybe helps get more direct to what I mean. Thanks for your post, and hope you guys are able to help.


    -
    http://limbohaunt.com
    Twitter: @LimboHaunt
     

  4. Default  
    #4
    Join Date
    Aug 2006
    Location
    Nashville
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    327
    Your building, tent or trailer is shorter then 10FT high ?
    Last edited by tonguesandwich; 09-29-2013 at 08:59 PM.
     

  5. Default  
    #5
    Join Date
    Oct 2012
    Posts
    48
    For the most part no, but in some areas it is at 10ft exactly, and Itd be nice to be able to figure out the meaning of this so that I might be able to save some money.
    http://limbohaunt.com
    Twitter: @LimboHaunt
     

  6. Default  
    #6
    Join Date
    Nov 2012
    Location
    Williamsburg, VA
    Posts
    2
    Adam,
    The term "aggregate horizontal projection" is refering to the total area of a multilevel play structure (like the things attached to some fast food restaraunts) and is not really applicable to a Haunted Attraction. The general paragraph above the one you referenced gives more context, it states: "Special amusement buildings, regardless of occupant load, shall meet the requirements for assembly occupancies in addition to the requirements of 13.4.7, unless the special amusement building is a multilevel play structure that is not more than 10 ft (3050 mm) in height and has aggregate horizontal projections not exceeding 160 ft2 (15 m2). "
    DCH
     

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