You're the engineer of record. Its your call. I will evaluate your submission based on the adopted codes and standards. You will demonstrate that it does.
Lastly I think you're taking a big risk accepting someone's else's flow test data. In my jurisdiction we will provide you with water maps, access to hydrants, and accompany you during flow testing, but you and only you conduct, supervise and obtain the test data. I liken design submissions to sales pitches. All you have to do is demonstrate that your design, methods and materials meet the adopted codes and standards. Our inspectors will verify the installed work meets adopted codes and standards. Can it be any simpler ? John Drucker Fire Protection Subcode Official New Jersey -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of å... .... Sent: Thursday, August 09, 2007 11:34 PM To: [email protected] Subject: water flows--that's how it goes I read recent discussion on AHJ psychology, or "how to approach the AHJ when you have an opinion to cultivate..." I hope to be proved wrong on this one, please, I want to be wrong...so I don´t have to carry on with the teaching baton. So I can go back to the drawing board without second thoughts, but right now, something doesn´t smell right. Could be me, but here is the way I see it to be. waterflow information was asked for: because it was going to be the difference between having a pump or not, I asked for and got a flow test from two different locations. This request was prompted by water department suggestions, suggestions that pointed out so elegantly, there were quite different sized mains in their city. To the West was the Best, and to the East lay the least. So, I ask for the East and the West flow test. No guess as to that we will use their best. and in a day or two I get my juice. nothing is confused. the East test is at 50 ft above sea level and the underground is 4 inch. the West test is at 25 ft above sea level and the underground is 8 inch. Pstatic (psig) Presid (psig) Flow (gpm) East 43 35 450 West 68 60 560 NOTHING is confused, is to use a venacular... because a few days later we get yet another letter from the water engineer that says "the waterflow info comes from the same city system. the only difference in pressure was due to static elevation." The IMPLICATION being there was no need for flow test separation. I can´t believe what I am seeing after I have done read'n. I can´t even believe I'm asking this question. but I have to mention, before I begin an attempt in "cultivatin' some education" in the department of water. I want to make sure my ears are not wet before I sit down offer some conciliation. to me, it is a no brainer (a thing that comes naturally). I need both tests because both residual pressures and flows are just this hidden until the flows shows--just how much gets up and goes. Sure, the static pressures are the same (after adjusting for elevation gain), but stating that the static P is enough to define the flow test ...is akin to stating that temperature rise in the flames is game on to defining fire size without mention of Qdot, fire area or chemistry, baby. So, may I tell the water department that we are giving them a second guess-- and that he did NOT miss his city time and money by giving us two flow tests? And yes, test West gives us just enough press at flow to miss having to go with all that pump mess. The fact that other people are arguing for a pump, regardless, of the city pressure is another measure of the caliber of designers we have here. Unlucky for me, they are deciding the plumbing on this building in closed door meetings. so I get to topple their apple cart, and start them down the path to hydraulic nirvana. I prefer simpler starts on a project like theirs; prefer no apple carts, prefer fewer mechanical parts. Seems as if I am going to have to sharpen my hoes, because who knows how many more times i am going to have to go back for mine, and beat back the weeds on these corn (agriculturally not ethnically) rows. if i sound cocky, i am not. it is just that I have got ground down, slowly. scot deal excelsior fire engineering _______________________________________________ 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)
