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  1. MedullaOblongata

    Determining the Percent Reduction in Design Area - NFPA 13

    Well got an answer to that .. It can be considered as a protected ceiling pocket and its height ignored while considering ceiling or roof height.
  2. MedullaOblongata

    Determining the Percent Reduction in Design Area - NFPA 13

    I have talked to few of the AHJs and pretty much this subject remains unclear. I have tried doing it both ways, but I'm trying to get a solid answer to make my self clear on this issue. Thanks
  3. MedullaOblongata

    Determining the Percent Reduction in Design Area - NFPA 13

    NFPA 13 11.2.3.2.3.3 “Where quick response sprinklers are used on a sloped ceiling or roof, the maximum ceiling or roof height shall be used for determining the percent reduction in design area.” Its a light hazard occupancy building and has sloped ceilings, the maximum ceiling height is...
  4. MedullaOblongata

    NFPA 25 - Main Drain Test

    Hello, Per NFPA 25 Table 13.1 Main Drain Tests are required Annually/ Quarterly. We are trying to size the floor drain/sewer line to drain water from the Main Drain during the test. The confusion is how much water flows from the 2" drain when its fully open. The city won't let the main drain...
  5. MedullaOblongata

    Design Area - Attic Space

    If you are using .15 gpm/sq.ft.. you just need to calculate 2535 sq.ft. Hydraulic calculations must be performed for the floor space area and size the pipes in attic based on your floor space area calculation.( But confirm the hydraulic most demanding area i.e sprinklers in attic space or...
  6. MedullaOblongata

    Obstruction to Discharge !!!

    Thanks SprinklerDesigner2 and cdafd... I will stick to the "Duct Rule".
  7. MedullaOblongata

    Obstruction to Discharge !!!

    Trying to avoid using extended coverage heads. Its and office space. Thanks !
  8. MedullaOblongata

    Obstruction to Discharge !!!

    Thanks cdafd & pipesnpumps. The heads can be moved away from the shade to spray underneath it... but cant maintain the 7'-6" max. distance from the wall to the head. Design is based on standard pendent spray heads. The light shelf need to be reduced to 16" max. depth to remain at the current...
  9. MedullaOblongata

    Obstruction to Discharge !!!

    Is there any NFPA 13 code section I can refer to avoid sprinkler heads underneath the sunshade? (Please see attached sketch) A room, 11’-0” ceiling height, light hazard occupancy has aluminum sunshade in the window. The sunshade is 3’-10” below the ceiling and extends 2’-11” into the room from...

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