Although a single pump for a complex can lead to a situation like we just encountered on a bid: Public lead-in to an industrial park, sep pumphouse and 125@ 2000 at pump discharge feeding down the road to numerous sites (only one building on it, the pump was sized to that demand we assume). We had a challenging hazard in the building we bid such that we will have to install a 2500 GPM fire pump in our building to boost the boosted supply.
So while the concept of one pump, or better, pool the money and install an elec and a diesel for max reliability, and go feed an entire complex- is sound economic thinking, today's systems are routinely getting so demanding that the old standby of a 150@ 1500 just doesn't cut it, especially if there are long runs of UG or elevation losses. Before ESFR, this was more practical- who saw many .8/2600 systems before 1990? But now, we've had to install a 750 supplemental boost next to a 1500 coming from a tank to produce the volume needed when the next addition to an ESFR warehouse was 45', attached to the old 40' max previously erected- since we had K25s. We've got two 2500's going in now, different sites, but in 1974- 1990 I only recall a couple of aircraft hangers with 4-2500's for deluge systems that had pumps in this range, or the occasional petrochemical with a 3,000 or sim monster. We also have a local hospital with a 3,000 for a light hazard, fully sprinklered hospital- maybe a pump vendor's brother wrote the spec for that- holy overkill! We did a powerhouse 25' away from the pumphouse, 4" lead-in, 2" wet riser, 1.5" DPV for the generator side. And huge cusions! glc -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Richard Malek Sent: Friday, May 04, 2007 9:56 AM To: [email protected] Subject: RE: Single Fire Pump Serving Multiple Buildings Standard practice in most large industrial and some commercial that I've had experience with. Most of the time looking at a stand alone building located in an advantageous location with respect to the water supply (tank, reservoir, municipal) and other factors. Doesn't typically make senses to bring a set of larger undergrounds to and from a protected building to locate the pump there since you are supplying other buildings through a private fire main system. I have seen the pump(s) in one of the protected buildings in older industrial in more urban settings with very limited yard space and in more urban commercial where again there is limited yard space for a stand-alone pump house. As others have stated, this is typically a single owner scenario. I have been involved with industrial sites where buildings/property was sold to a different owner and fire protection water supply remained with the larger industrial complex. Generally that's a problematic arrangement from what I've seen, but I've seen AHJ/water purveyors sign off on it to promote re-development of older industrial sites. Those are the arrangements where you spend more time with lawyers then with the fire protection aspects of the project. Richard Malek [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Bobby McCullough Sent: Friday, May 04, 2007 7:47 AM To: [email protected] Subject: Single Fire Pump Serving Multiple Buildings Is there something in the IFC or IBC 2006 or NFPA 20 which would prohibit a booster fire pump from supplying multiple buildings on the same property? Would it make any difference if the fire pump was in a stand alone building or inside a two hour enclosure of one of the protected buildings? The scenario is a developer with three detached 200K sq ft spec warehouse buildings with ESFR systems, all on one property, a good public water supply but not quite good enough. All buildings are supplied from a single tap to the public water system with a DDC device in a vault. NFPA 13-07 8.2.5 refers to "systems" or "risers" and I don't see the intent for it to include a booster pump supply. Bobby McCullough _______________________________________________ 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) _______________________________________________ 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)
