Reza, A few random comments: 2- When we have the pressure and flows available the Tyco EC uprights (like EC-11) have worked out well on a few recent jobs but you really start accumulating over discharge on the branch lines quickly with the higher end head pressures. That issue also tends to fight dry system design goals by creating bigger pipe size, more system volume, etc., so IMHO for some layouts a good argument can be made for standard coverage heads instead of EC's. 4- It is not necessary to sprinkler above each car. 5- "Fully sprinklered" would include the ramps too if covered. 9- A couple of FWIW notes that come to mind on a single dry riser for the building you describe = concerns over dry system trip time, total dry system volume and air compressor size. Good success, Kurt Kingston Commercial Fire Protection Inc. Mt. Vernon, WA.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Reza Esmaeili Sent: Thursday, January 31, 2008 8:17 AM To: [email protected] Subject: Parking Garage Sprinkler System Hi All, I would like to ask about sprinkler system design in a car parking garage. The parking garage has two stories (Basement & Ground floor). It is only for car parking application which can hold about 350 cars. There is No mechanical devices to transport cars, and cars will drive to their own parking palaces. The area of each story is about 44,000 square feet, and ceiling high is about 10 feet. We are going to design a dry pipe sprinkler system for this car parking garage as piping are subjected to freezing during the cold weather. I looked up in NFPA codes for designing car parking garage, but I couldn't find that much helpfull information in NFPA-88A. In NFPA-13 I saw that automobile parking and showrooms are specified as Ordinary hazard occupancies (Group 1). I am going to design a tree dry pipe sprinkler system & some inside fire hoses in the garage. My questions are as followings: 1- What is your recommended Area of sprinkler operation and Density for my application after determining from the Density/Area curve? 2- I am going to use upright sprinklers, what kind of sprinkler is more common for such an application? standards coverage/extended coverage...? 3- What is the common distance between sprinklers and maximum area of coverage per sprinkler for a parking garage? 4- Is it necessary place a sprinkler exactly at above each car or not? 5- Is it necessary to place sprinklers in corridors & ramps where no cars are parked and only cars are moving? 6- What is the NFPA recommended duration for sprinkler system & inside hose stream? 7- Can I connect the inside hose to the dry sprinkler system piping? or shoud I connect the inside hose piping directly to the fire pumps? 8- I will place some insde fire hoses in the garage that provides 1 1/2 in. hose stations and according to NFPA-14 the minimum residual pressure at the outlet of most remote 1 1/2 in. hose stations should be 65 psi for hydraulically designed systems, so I think my fire pump head should be at least 80 psi? What do you think about this fire pump head, do you think it is low, high or good? 9- I want to protect both strories with a single riser using a 4" dry pipe system to feed my sprinkler system & fire hoses, what do you think about it? Thanks for your kind help in advance, Reza --------------------------------- Looking for last minute shopping deals? Find them fast with Yahoo! Search. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
