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  1. SprinklerDesigner2

    Question concerning "FM Data Sheet 8-9 Storage of Class 1, 2, 3, 4 and Plastic Commodities"

    What UFT12 says is so true when it comes to exposed plastic products. Used to be when K16.8 pendents would cover just about anything in a building not exceeding 40' high. My state just adopted the 2022 a few weeks ago so I am still reading up.
  2. SprinklerDesigner2

    Am I reading this correctly? FM Data Sheet 8-9 Table 8

    I got a little job where the ceiling is 16'-6" and FM Global directed me to FM Data Sheet 8-9 Table 8 I know I am reading this correctly but the pressures seem awfully low to me. Using K25.2 EC https://www.vikinggroupinc.com/sites/default/files/2025-03/121610.pdf all I need is 6 heads...
  3. SprinklerDesigner2

    Spray foam insulation and hanger rods

    I am dealing with an attic constructed of wood rafters that appear to be totally constructed using 2x4's. Problem is the installation of 0'-11" of spray foam insulation which dictates I have to use upright sprinklers and I am planning to install the deflectors about 1'-10" down from the roof...
  4. SprinklerDesigner2

    Hydrant flow test with static and residual obtained DOWNSTREAM the flowing hydrant on a dead end line.

    But between the hydrant and the flange and spigot there is no water moving so the residual pressure would be the same as if you attached a gauge one foot before the hydrant.
  5. SprinklerDesigner2

    Hydrant flow test with static and residual obtained DOWNSTREAM the flowing hydrant on a dead end line.

    Nothing in the line. Direction of Flow ---->>>>>>>> ---------------------------0--------------------------X 0 Indicates Fire Hydrant X Indicates Flange & Spigot Distance Between Hydrant and Flange & Spigot is Approximately 75'
  6. SprinklerDesigner2

    Hydrant flow test with static and residual obtained DOWNSTREAM the flowing hydrant on a dead end line.

    In my 50 years experience I always used an upstream hydrant to obtain a static and residual flow flowing the downstream hydrant. What I am dealing with is a recently installed 6" dead end city water main that has a fire hydrant located about 100' from the fire sprinkler flange and spigot piece...
  7. SprinklerDesigner2

    NFPA 13R Density required outside the living units in a common area when using listed residential sprinklers.

    Another thing that popped up that greatly concerns me. I have an attached 50'x8' patio deck' constructed constructed of 2"x10" open wood joists @ 16" OC. NFPA 13R Section 6.6.5.1.1 6.6.5.1.1 Where sidewall sprinklers are installed beneath decks or balconies constructed with open wood...
  8. SprinklerDesigner2

    K25 Sprinklers in Warehouse – Effect on Connected Light Hazard Areas?

    Per NFPA #13 ESFR sprinklers can cover Light and Ordinary Hazard areas but NOT Extra Hazard Areas.
  9. SprinklerDesigner2

    NFPA 13R Density required outside the living units in a common area when using listed residential sprinklers.

    Thank you Travis, that is what I thought but just wanted to be absolutely certain.
  10. SprinklerDesigner2

    NFPA 13R Density required outside the living units in a common area when using listed residential sprinklers.

    I have a three story apartment building where the architect of record specifically called for a system designed per NFPA 13R and not NFPA #13. We have a common corridor where I used Tyco TY2325 listed residential dry sidewall sprinklers as the corridor is open at each end...
  11. SprinklerDesigner2

    Question concerning "FM Data Sheet 8-9 Storage of Class 1, 2, 3, 4 and Plastic Commodities"

    The days of playing with exposed plastics is about over. Protection of palletized, solid-piled, or rack storage of Class I through Class IV and Group A commodities shall be in accordance with Table 23.3.1. Look out for buildings exceeding 30'.
  12. SprinklerDesigner2

    Question concerning "FM Data Sheet 8-9 Storage of Class 1, 2, 3, 4 and Plastic Commodities"

    Thank you so much for the super fast reply! No racks. In our area we are required to have a 20 psi "cushion" at the fire pump suction when at 150% of capacity. Not a whole lot of city water mains can provide 3,000 gpm @ 20 psi which would actually be close to 30 psi at the city main once...
  13. SprinklerDesigner2

    Question concerning "FM Data Sheet 8-9 Storage of Class 1, 2, 3, 4 and Plastic Commodities"

    Really pretty simple and straight forward but I just want to make sure I am interpreting this correctly. The building peek is between 30'-0" but does not exceed 35'-0". Lots and lots of water.... it appears I have two choices: Choice #1: 12 K22.5 quick response sprinklers discharging at 63...
  14. SprinklerDesigner2

    I know I have the the right answer but I just want to make sure.

    Thank you. I knew it wasn't required but I didn't want to take a chance on my 3,000 head ESFR storage facility being turned down because I didn't have a couple heads in the pump house.
  15. SprinklerDesigner2

    I know I have the the right answer but I just want to make sure.

    I have an electric pump in a 20'x20' metal (metal siding with bent metal purlins) building. The closest building, which is a fully sprinkled warehouse, is 130' distant. NFPA #20 2016 Table 4.13.1.1.2 tells me the fire pump house does not require sprinklers.
  16. SprinklerDesigner2

    I have an older warehouse being converted to an public assembly arena. Does anything need to be done with the sprinkler system?

    I was told it would be used as boxing rink? Seems strange but I was asked if any work needed to be done. I don't think so as far as the sprinkler system goes but I am pretty sure the fire alarm system will need some work but I know enough about fire alarms to be dangerous.
  17. SprinklerDesigner2

    I have an older warehouse being converted to an public assembly arena. Does anything need to be done with the sprinkler system?

    The total building is 80,000 sq ft. Maybe I am wrong but the way I read it is quick response sprinklers are only required if the design is for a light hazard occupancy which, at a density of .25/3,000+500 hose it is not. As far as the occupant load I would leave that up to the architect of...
  18. SprinklerDesigner2

    I have an older warehouse being converted to an public assembly arena. Does anything need to be done with the sprinkler system?

    An older warehouse about 30 years old equipped with wet K=8.0 SR uprights on a system designed for baled cotton storage having a density of 0.25 gpm over 3000 sq ft with 500 hose. I believe it is just fine just as it is and even though it is a light hazard occupancy not having QR sprinklers...
  19. SprinklerDesigner2

    fire water demand

    In my opinion, and just my opinion, a fire sprinkler designer should have nothing to do with calculating fire flows because they are not related EXCEPT if a building has sprinklers there is a percentage reduction allowed. It is also my understanding that the method to calculate fire flows can...
  20. SprinklerDesigner2

    fire water demand

    Travis, This is sort of a rural project where we have a 6" city water main where a dedicated 6" line. The local fire official has approved the fire flow submitted by a licensed professional engineer so I am good to go.

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