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  1. chevy4x4trucks

    Attic System Design

    If there is any opportunity to get your dry valve located more towards the center of the building that would at least help split up your volume and help trap air into one side of the system when the valve trips to give you a more fighting chance of hitting a 60 second delivery time. As it is...
  2. chevy4x4trucks

    Residential Dry Sidewall application

    The only application I can come up with would be a wet system protecting a three season room in northern climates.
  3. chevy4x4trucks

    NFPA 20 7-5.2.1 Water Pressure Control

    Not a problem. $800 to make it right is a reasonable price, but if you can get the original contractor to fix it even better.
  4. chevy4x4trucks

    NFPA 20 7-5.2.1 Water Pressure Control

    Oldest copy of NFPA 20 that I have is 1993 edition and it reads the same way 7-5.2.1 (a) For all pump installations (including jockey pumps) each controller shall have its own individual pressure sensing line. As far as what code was in effect at the time of your installation you would have to...
  5. chevy4x4trucks

    Surveying Existing High Deck Systems?

    I've had good luck using a telescoping pole and then affixing a half of a split pipe ring on it. You can usually get a pole that will reach about 40' and the split pipe ring (chrome plastic escutcheon) either fits or it doesn't so you can get a very accurate reading that way...
  6. chevy4x4trucks

    Commercial Heads

    Viking makes heads that have a 22' throw.
  7. chevy4x4trucks

    HydraLIST

    Are you on the latest version of HydraCAD & HydraList? On v51 you really need to have a drawing that elevates properly in order for it to list properly. If the pipes are "broken" when it goes into 3D the listing tags won't continue on and then you get errrors. Are calcs working for you? I...
  8. chevy4x4trucks

    Water meter on dedicated fire service mains

    This all comes down to the local water purveyor and will vary from area to area.
  9. chevy4x4trucks

    approved hangers

    Are you referring to something like this: http://www.globalindustrial.com/p/tools/vibration-isolators/vibration-isolation-hanger/spring-vibration-isolation-hanger-3-long-3-wide-silver?utm_source=google_pr&utm_medium=cpc&utm_campaign=Hanger-Mount-google_pr&infoParam.campaignId=T9F or this...
  10. chevy4x4trucks

    Warehouse Storage, High Piled Storage, Sprinkler System

    Chances are the systems are not adequate, especially if you are talking rack storage of plastics. The system would have to be hydraulically calculated to determine if it is capable of meeting the density required for their storage arrangement. You should make a note of this to the customer and...
  11. chevy4x4trucks

    CONCEALED SPACE SPRINKLERS

    I would either have them raise the ceiling 2" or put a layer of rock on the bottom of the 2x's
  12. chevy4x4trucks

    Sectioning with supervised valves in shopping mall

    I have done this in malls before (actual shopping malls, not strip malls). I believe this goes back to the IBC and it was just for the reason you described, so that when the space is remodeled it doesn't shut down 52,000 square feet of mall space for a 2,000 square foot tenant remodel.
  13. chevy4x4trucks

    Residential Sprinkler Installation

    I would get a hold of the architect and find out if there was a reason the building was classified as a 13 building and not 13R. Check the building height vs the IBC code to see if a standpipe is required, but with it being only 3 stories it would be very doubtful. Also, check into any other...
  14. chevy4x4trucks

    combustible roof deck - intumescent paint

    It would be similiar to covering the bottom side of the wood with gypsum board which is done frequently to cover combustibles.
  15. chevy4x4trucks

    High Temperature Sprinkler Applications

    At those temperatures wouldn't you have concerns about the water turning to steam? I would be concerned about the pipe blowing out then since it would be over pressurized. Would it be possible to use a dry pendant?
  16. chevy4x4trucks

    residential fire pump

    With a 50 GPM pump this sounds more like a 13D system. Is this a 2 family condo?
  17. chevy4x4trucks

    Flex-Fire Sprinkler Heads

    1- You'll have to check the cut sheet for the flex heads, but the type I typically use you need to include 45' of 1" sched 40 pipe in your calculations for them. So, yes, they will have an impact on your calcs. If you are in a light hazard occupancy and using standard coverage heads it does...
  18. chevy4x4trucks

    Job Price Deviation Over-Time

    I did some price comparisons on dry pendants a month ago between Viking, Tyco and Reliable and Viking came back with the best price by about $2.00 I would try Viking Supply Net and see what you can do. I should note that we buy probably 80% of our heads from Viking so they may be giving us a...
  19. chevy4x4trucks

    Minimum distance from walls

    I concur with Stooeyfpe based on some classes/training with NFSA. This rule is because the heat and gasses don't make a hard 90 degree turn at the ceiling, they do more of an arc. This is the same reason sidewalls need to be down a minimum of 4" as well. I would say the 4" is to the center of...
  20. chevy4x4trucks

    Overhead door coverage.

    The only omission that NFPA 13 allows as far as distance from one surface to another is the 6" for a ceiling below solid wood members. That's where I have made the cut off point when it comes to putting heads under low fixed obstructions. I know it's a different code reference, but the same...

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