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  • Users: NJ1
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  1. NJ1

    In rack Design and Storage Height Limitation.

    Ok. I went to job site today and this if what I found. Hydraulic Name Plate Info. (Each Hydraulic Plate) Number of Sprinklers 320 Density .6 gpm sq ft Design Area of Coverage 2500 sq ft System Demand GPM Discharge 1563 GPM Residual Pressure at base of riser 115 psi Static pressure at riser...
  2. NJ1

    Antifreeze Systems

    Hello Guys My Engineer is out of vacation and I cant remember how you measure amount of gallons per liner foot of pipe. I cant remember where to find this on NFPA. Any help?
  3. NJ1

    Warehouse Storage, High Piled Storage, Sprinkler System

    I recently did a sprinkler inspection at a warehouse with over a thousand heads. The warehouse is divided into three tenant spaces. The warehouse is about 35-40 feet of height and the storage is about 25-30 feet height. (in cases less than 18" height from deflector) Everything is stored in...
  4. NJ1

    Water Curtain

    Here’s my question: We have a fully sprinkled building that has a tenant that has a glass door in the hallway partition. The wall is not rated. Is it required to have a head on both sides of the door, centered, like a water curtain? My answer after looking up all codes I could find was no...
  5. NJ1

    Pressure Loss per Floor

    I can not remember how much pressure you loose in a multiple floor building. I think it is 3-4 psi per floor up to the roof. I just cant find it in the nfpa standards. Any help
  6. NJ1

    Residential Sprinkler Installation

    I just won a bid for a new installation on a residential home. What caught my attention is the fact that it is a stand alone three family house but the mechanical engineer (PE) design the system (not hired by me) as a NFPA 13-2002. I noticed all calculations and notes on the drawings are per...
  7. NJ1

    Flex-Fire Sprinkler Heads

    I am not an expert when it comes to design so I would like some opinions and advise when it comes to these types of sprinkler heads. I am currently bidding in a federal job that states on the fire sprinkler specs the use of flex heads. I question the contractor why such requirement since this...
  8. NJ1

    Job Price Deviation Over-Time

    I was having a conversation about pricing with a client and I thought I would see what is going on with the bigger picture. Assume a typical two-story commercial building with approximately 500 sprinklers. Nothing fancy or out of the ordinary. What would the price differential (%) be...
  9. NJ1

    Fire Alarms Testing and Inspections Requirements

    I would like a little guidance from the experts here. I am not too familiar with fire alarms but I would like to start preparing for my first NICET test in alarms ever. I know that it is not the intent of the NFPA 25 to identify installations flaws. My questions is: Does the same philosophy...
  10. NJ1

    Simplex Grinnell Recalled Fire Alarm Panels

    I just received this update from ASCET new letters. Follow the attachment below.
  11. NJ1

    NFPA 13 DEFICIENCIES?

    This is why you must train your guys to keep within the scope. I obtain this information from an article in the Fire Protection Contractor Magazine. Loss: $12,000,000--What Happened? Our contractor performed annual inspections at our shopping center. He had being doing so for years. The strip...
  12. NJ1

    Shall vs. Should (Clarification)

    thread184-274291 I started many months ago the above thread looking for some real clarification in reference to should vs. shall. Well I just recently obtained such clarification by means of law. I have always trained all my inspectors to indicate deficiencies using the word shall. During a...
  13. NJ1

    Dry Heads on Freezer/Coolers

    I once heard that the length of dry sprinkler heads to be selected on freezer/coolers is based on how cold the inside will be. That comment seems a bit confusing since I do not see any relevance to temperature as long as you insulate the sprinkler head properly. I just got a job to install 135...
  14. NJ1

    Fast Response Heads on Residential Application

    I am currently retrofitting and old warehouse building to new residential apartment building. I am in the last stages of the job but what is weird is that all prior sprinkler contractors employed standard response sprinklers. My company is employing fast response heads to all new sprinklers...
  15. NJ1

    Sprinkler Coverage Above Ceilings

    An existing building originally designed per NFPA 13 is being retrofitted to be 13R. New ceilings in hallways are being built with a depth pocket of 3-4 Feet from slab to drop ceiling. What does nfpa 13r says in reference with sprinkler coverage between slab and drop ceiling. Is it required to...
  16. NJ1

    NFPA 13D Inspections

    We all know that NFPA 25 does not cover 13D inspections, Testing & maintenance but I have not seen a report that covers 13d inspections. Does anyone has a valid report that can be used for such inspections? Is it NFPA approved? A local jurisdiction inspector in NJ asked me for a NFPA 25 report...
  17. NJ1

    NFPA 25 ISSUES

    Dear Friends of Eng-Tips Forums The reason for this posting is to discuss an ongoing subject that appears not to be so important to those involved in the fire protection business. The subject is the proper training and certification requirements for those performing water based systems...
  18. NJ1

    USED FIRE SPRINKLERS?

    GUYS LET PICK EACH OTHERS BRAINS FOR A SECOND. Is there any book, standard, code, etc., that does not allows you to reinstall used sprinkler heads. Example: You have a new installation of 100 sprinkler heads. The job is completed even hydro tested but 6 months later when final inspection is due...
  19. NJ1

    DRY SYSTEM LIMITATION

    Good Morning I just got a phone call from a friend telling that one of his clients has an issue. Is a day care with a dry system. It has being like that for years and now the fire sub code tells the day care they can not have a dry system in a day care. The dry system takes care of the day care...
  20. NJ1

    Vane Type Water Flow Device

    Does anyone here know the distance required from a paddle type flow switch and a Elbow. I try finding such code but no luck yet.

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