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  1. Robert Gardner

    Group A plastics

    Started a new sprinkler design for a "FIVE BELOW", the retail store is about 8,000 SQFT 22ft top of steel, one of eight stores in a new mall. I would have used a OH2 design until I Googled five below "Images" Group A plastics on sales walls to 10 ft. and through the front retail sales area...
  2. Robert Gardner

    30" Round Spiral Ducts Under ESFR Heads

    I thought I read some where that the spacing under the spiral Duct work was limited to 8 Ft. spacing. The building is under 30ft. storage to 20ft. I also thought I read you need a Baffle above the sprinkler the same Dia. as the duct work for a heat shield. Sprinklers on Br Lines at roof have a...
  3. Robert Gardner

    Floor Control valves

    What is the requirement for having to use multi floor control valves with valve, flow switch and drain.(Sprinkler only standpipe) Light or ordinary two-four story buildings, I know some four story building have a height requirement.
  4. Robert Gardner

    FIRE DEPARTMENT CONNECTION

    I noticed Large box warehouses, ESFR system with Fire Pumps that have remote Fire Department Connections that are run with 6" to the Storz Connection. I referenced NFPA 13, 2010 Addition and did not find a specific 4" or 6" requirement. I lookup the friction loss for 4" (1500 GPM) and its not...
  5. Robert Gardner

    ESFR Spacing

    ESFR SYSTEM 40FT building, ESFR 17 sprinklers, 100 sqft. BAYS 52FT, Heads 10Ft on center, Lines 10Ft on center. Line 12" OFF the leading edge of Truss, Truss more that 70 percent open. Is this OK.
  6. Robert Gardner

    Fire Hydrant OFF ESFR GRID

    I have a 6x4 gridded ESFR sprinkler system with 2" or 2 1/2" branch lines. The GC decided not to run the underground main around the building to the hydrant. he wants me to run the hydrant off the 4" floating main or the 6" feed main over to the incoming 6" underground that supplies the hydrant...

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