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Designing an Emergency Operation Centre What length of time can you store Potable cold water for an emergency scenario without applying any circulation or water treatment? If you have a potable water storage tank filled with generic treated city water for 5 days use (state of emergency...

Gents, I posed a question over a year ago with regards to window sprinklers. Just want to clarify. If you use Tyco WS "closed" window sprinklers do they need to be on their own zone? Was putting window sprinklers on their own zone only due to the older "open type" heads? Application is...

Main Office is Yellowknife, but work includes everywhere from Alert to Iqualuit to Edmonton, Inuvik to Whitehorse....

Gents, NFPA 22 says fire water tank vent needs to be minimum of 2". Somewhere (long ago) i've heard that the tank vent needs to be at least 1 pipe size larger then suction line to fire pump. Does anyone have any additional information? Or heard of the same requirement. This job in...

A water flow switch is on each floor zone control assembly. Where sprinklers are provided they are the fire alarm. Sprinklers are the fire detectors in that space or room. I thought it was clear, i must be really missing something.

Found my answer for those of you in Canada... The sentence I was looking for is NBC 2005 Appendix-A 3.2.4.8.(2) "Alarm initiating devices referred to in this sentence include fire detectors, water flow switches and manual stations. If room or space in a building extends through more than one...

Yeah.. that's the exact wording i remember too.... "The zoning remains the same as the floor it serves"... I've gone through NFPA 13 2007... In the past i was familiar with 2002, and 1999 (i think}.. so maybe that clause was in one of them! I wish NFPA would create some new clauses for zoning...

Hey Dudes, A gym in a school should be piped from the first floor zone and not the 2nd floor sprinkler zone. I know this is how it's done, i've looked through 13 but can't find it, i know it's there... i've read the line before. I'm about to throw 13 out the window. This clause says...

have you noticed the temperatures in yellowknife recently... im not sure how they did it either... i just got back from fort good hope, the sun came up at 10:30 and disapeared again at 2:10... i'm not sure how people deal... It is pretty bad when you get to work and somebody says at least it...

Thanks Chris! Just out of curiosity, what is your location? I'm working out of Yellowknife, nearly in the arctic. I need to tack on 25 to 50% extra on those numbers.

Anyone have any square foot estimates for Ventilation and or Sprinkler tenant improvements in an Office Building? Or Just plain HVAC?

Gents, NFPA 2007 13 A.6.9.3.1 "Outside alarms can be omitted where the sprinkler system is used as part of a central station, remote station, or proprietary signaling fire alarm system utilizing listed audible inside alarm devices." What the hell does this mean? You still need one inside of...

Folks, I'm hoping someone will know this. NFPA 55 10.3.2.2.3 States: Portions of wall less than 10 ft (measured horizontally) from any part of a system shall have a fire resistance rating of at least 1/2 hour. NFPA 55 10.3.2.2.5. States: Portions of wall less than 10 ft (measured...

Has anyone ever heard of or seen sprinkler heads installed in a large rooftop unit with a side attached service space with large plenums. I understand having heads in the service spaces, and large plenums, but having them in each section of the unit, ie: Coil section and fan section? Any...

Folks, I have just went through the 2006 thread with regards to Standpipes and Multiple FDC's etc. However I still have a couple of long winded questions. I apologize in advance. When designing a combined system (standpipe/sprinkler system)the hydraulic calcs. includes calculating 500 gpm @...

Depends is a great answer. Unfortunately our buddies at the Gov. do not like depends as an answer. hahah I was hoping to get some code section or phrase so I can prove to them a calc. is not required. But looks like it just may take some detailed explaining. But thanx for the responses. We...

"Depends" seems to be the going answer. Just out of curiosity what part of north America are you working in just for shits and giggles? Our Local AHJ is letting experienced Sprinkler Contractors tell them, whether or not they feel a new Calc. is required. I find this may be a little biased...

Has anyone gotten specific. data from NFPA or AHJ's with regards to at what point during a renovation does an existing hydraulic calc'd system require a new hydraulic calculation performed. Existing pipe schedule system can have pipe schedule done on reno's up to 5000ft2. I've looked...

What is meant by an open sprinkler? And when you say open system does this mean have it's own supervised valve and flow switch, drain and site glass?

Stookey & Travis, Yeah the link to the fancy window is very interesting. Just another follow up question with regards to window sprinklers. I just can't seem to find much information in NFPA 13 dealing with them. The only references to windows I see in NFPA are marine applications and what...