Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: skdesigner
  • Content: Threads
  • Order by date
  1. skdesigner

    ESFR Systems with Conveyors - NFPA 13-2022 14.2.11.4 (4)

    The above reference states that additional sprinklers are not required below belt conveyors up to 4ft wide, where the area below is void of storage. In my situation I have two conveyors, each approximately 2'-9" in width running parallel with each other, with a 2'-9" gap between them. Would I...
  2. skdesigner

    NFPA 13-2013 Figure A.8.15.23.3

    The above figure (showing the extension of sprinkler protection above a drop ceiling) is fairly straightforward. I have a situation where the open space above a drop ceiling occurs at the 't' intersection of a corridor. In the picture, the camera is pointed towards the 'T', where a new rated...
  3. skdesigner

    ESFR design area with only two branch lines

    I imagine this has been asked and answered before, but I must be using the wrong combo of keywords in my search. I have a small storage room where ESFR sprinkler protection will be required in order to avoid in-rack sprinklers. It is a very narrow room, such that it can be protected with two...
  4. skdesigner

    ESFR Dry pendent sprinklers and ceiling-level obstructions

    I have a question with regards to the ESFR dry pendent 'box-in-a-box' freezer installation. How do you handle the large ceiling-hung condensing units that are present in basically every large cold storage freezer / cooler? Do you provide some kind of a supplemental system below the units? I...
  5. skdesigner

    NFPA 30 - Sprinkler Design Criteria for a container not listed in Chapter 16

    I have a building where a Class IIIB liquid is stored in several large Intermediate Bulk Containers, each with a volume of 5000L (approx. 1300 gal). Chapter 16 appears to limit the volume of IBC's to 3000L (793 gal) when providing sprinkler protection criteria. Where would one find sprinkler...
  6. skdesigner

    NFPA 20 - suction/discharge pipe sizing

    I am in need of a fire pump history lesson. In the past two weeks, I have looked at two separate fire pump installations where 2,000gpm pumps had been installed with 8" suction and discharge piping, instead of the minimum 10" piping required by NFPA 20. The first time, I was quick to point it...
  7. skdesigner

    NFPA 13-2013 Table 18.4(a) 'see Note 1'

    I have been asked to provide comment on the following situation: Existing flat roof warehouse, OWSJ roof construction, roof deck approx. 28' above floor, control-mode density area sprinkler system (complete with 11.2k uprights and a fire pump). Potential new tenant wants to store tires in said...
  8. skdesigner

    Aircraft Hangars - NFPA 409

    My question will probably betray my lack of experience with aircraft hangar fire suppression systems, so let me preface this post by saying that I am not attempting to design something outside my abilities, not trying to engineer a solution when I am not a licensed engineer - heck, I haven't...
  9. skdesigner

    Elevator shafts

    Question regarding elevator shafts in combustible construction. NFPA 13-2010 8.15.5.5 The sprinkler required at the top of the elevator hoistway by 8.15.5.4 shall not be required where the hoistway for passenger elevators is non-combustible or limited combustible and the car enclosure materials...
  10. skdesigner

    NFPA 13 22.4.4.6

    I recall seeing an explanation in an issue of Sprinkler Quarterly, however I have since misplaced the issue and the intent of the section. NFPA 13-2010 22.4.4.6.2 Where the design area is equal to or greater than the area in Table 22.4.4.6.2 for the hazard being protected by the sprinkler...
  11. skdesigner

    FM global and ESFR sprinklers

    I remember reading somewhere that FM Global does not require the inclusion of up to two ESFR sprinklers beneath an obstruction in the hydraulic calc like NFPA 13 does as long as you pipe to the head with the same diameter pipe as the branch lines. I scanned through FMDS 2.0, 3.0 and the 8...
  12. skdesigner

    calculating extended coverage and standard spray heads

    I have been reviewing some drawings and calculations done with sprinkcad and have come across something I have not dealt with before, being an autocad/manual entry hydraulic calc kind of guy. In a parking garage, extended coverage sprinklers have been used in a 16' wide bay, to eliminate one...
  13. skdesigner

    Water flow equation

    I had it written down, lost it and for the life of me I can't remember how it goes. Equation to figure out flow at a certain pressure when given static and residual. For example, I do a flow test and come up with x static and y residual pressure at some flow. I need to determine how much flow...
  14. skdesigner

    Fire pump bypass

    NFPA 20-2007 5.14.4.1 Where the suction supply is of sufficient pressure to be of material value without the pump, the pump shall be installed with a bypass. Has anyone qualified what "material value" is? Best answer I have received is that if the city supply can provide enough pressure and...
  15. skdesigner

    High pressure in standpipe system

    Being a prairie guy, I don't do a lot of sprinkler/standpipe systems in high rises. This means I don't deal with >175psi too often. Designing a system for a 36 story, two stair condo at the moment, and I am looking at very high pressures at the lower levels in order to hit 100psi @ 250gpm at...
  16. skdesigner

    13R, 3000 sq. ft and travelling up the curve

    I am designing a 13R system for a 4 storey building. The floors are framed with open-web wood joists, and there will not be sprinklers in the combustible concealed space. Main floor has a large common area, which would force me to calculate 3000 sq. ft. NFPA 13-2010 11.2.3.2.7.2 prevents me...
  17. skdesigner

    Sidewalls under Overhead doors

    Mundane question for a thursday afternoon. NFPA 13 2010 8.7.3.1.7 Permits sidewalls under overhead doors in an otherwise ordinary hazard area to be spaced for light hazard. 8.3.3.1 would dictate these sprinklers have quick response elements. 8.3.3.2 then requires that if the sidewalls are...
  18. skdesigner

    Piping support question

    Storage occupancy, with the water available I believe I can make it work without a pump. The downside...I'm looking at 6" main and 4" branchlines. The roof structure is bent metal "z purlins", and the GC has asked for point loads to determine if the steel can support the hangers. NFPA 13 2010...
  19. skdesigner

    Single Inlet FDC

    13 2010 6.8.1.3 states that I can use a single butt fdc where the riser is 3" or smaller. I was sure there was a code reference somewhere stating that the fire dept. supply line had to be at least the size of the riser, but I can't find it in the 2010 edition. I'm thinking I am good to go with...
  20. skdesigner

    NFPA's antifreeze ammendment

    I'm wondering how other forum members are approaching this issue. I've talked to quite a few people about it, some are receptive, some aren't. Some engineer's have changed their specs to read "install dry system" after I've forwarded them the information, and building owners have stonewalled...

Part and Inventory Search

Back
Top