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Recent content by SprinklerDesigner2

  1. SprinklerDesigner2

    Another FM Data Sheet Question-You would think I would know this by now

    Three heads per line! Thank you.... UFT12
  2. SprinklerDesigner2

    Another FM Data Sheet Question-You would think I would know this by now

    Got an FM job where we are dealing with FM Data Shhe 8-9 Table 8. Ceiling-Level Protection Guidelines for Class 4 and Cartoned Unexpanded Plastic Commodities in Open-Frame Rack Storage Arrangements. The height of the building is 17'-6" at the highest point. I would like to use the K25.2EC...
  3. 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.
  4. 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...
  5. 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...
  6. 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.
  7. 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'
  8. 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...
  9. 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...
  10. 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.
  11. 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.
  12. 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...
  13. 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'.
  14. 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...
  15. 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...
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