When I started at FM in the late 70s (as a toddler), their LH design was 0.10 over 3000 sqft. I think it was the late 80s when they came in to agreement with NFPA on the 1500 sqft area requirement.
At 10:23 AM 9/24/2009, you wrote: >Mark, > >I had a project about 3 years ago with an large open office area, >and the FM guy wanted it calced as OH1 at 3,000 sf. We could reduce >that to 1,500 sq. ft if they owner would split the area into two >spaces with walls that went to the deck. When asked, this was one >of those "unwritten" standards. didn't make much sense but this job >had lots of surprises like that. We had sprinklers in process areas >at the deck, below equipment and in the high bays at the 15ft >elevation around certain pieces of equipment. The equipment didn't >require vessel protection per NFPA. We had more sprinklers per >cubic ft than on any job I'd ever seen. > > >Craig L. Prahl, CET >Fire Protection Specialist >Mechanical Department >CH2MHILL >Lockwood Greene >1500 International Drive >PO Box 491, Spartanburg, SC 29304-0491 >Direct - 864.599.4102 >Fax - 864.599.8439 >[email protected] >http://www.ch2m.com > > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Mark Sornsin >Sent: Thursday, September 24, 2009 10:12 AM >To: '[email protected]' >Subject: RE: Inadequte Water > >Steve: > >Which UFL standard is requiring the 12 psi drop across the >backflow? This is the second time I've heard of this but have not >yet had to deal with it (I don't know why not). > >I would LOVE to have a sit-down with the 'powers that be' >responsible for the UFC standards. E.g. where do they get the 3,000 >sq.ft design area crap? They say it's common HPR requirements in >the civilian world - except I worked for FM and we NEVER required >3,000 sq.ft. design areas for light or ordinary hazard-equivalent >occupancies. Maybe they just want to cover themselves in case a >combustible concealed space appears... > >Mark A. Sornsin, PE >Fire Protection Engineer >Ulteig Engineers, Inc. >3350 38th Avenue S. >Fargo, ND 58104-7079 > >Direct: 701. 280.8591 >Fax: 701.280.8739 >Cell: 701.371.5759 > >[email protected] >www.ulteig.com > >Confidentiality Notice >This message may contain privileged and confidential information. If >you think, for any reason, this message may have been addressed to >you in error, you must not disseminate copy or take any action in >reliance on it, and we would ask you to notify me immediately by >return email to [email protected]. > > > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Steve Kowkabany >Sent: Thursday, September 24, 2009 7:18 AM >To: [email protected] >Subject: RE: Inadequte Water > >I have the single most frustrating water issue I have ever had going >on right now Greg. I am working on this small commercial entrance >facility at a military base in Georgia. We are only sprinklering a >small 3,800 sqft cargo transfer building and getting the water from >the local utility rather than the base. > >We designed based on modeling data that was the only thing available >at design (there was no water within a mile then) and had no problem >making the small light hazard wet system work. > >Last week the underground was finally finished and we had our main >run up to the building and some nearby hydrants to test, so we >tested them - 55/25 at 750 gpm. Bad water but still enough to make >an little light hazard wet system work right? > >Not once you take a 3,000 sqft design area, a 500 gpm hose allowance >due to the presence of 300 sqft of OH1 rooms, and a mandatory 12 psi >pressure across the BFP regardless of the fact that it is actually a >double-check - all mandatory per UFC codes. After all that, you >need 850 gpm at 40 psi to make this system work and we are looking >at a pump and a tank! > >It's a very frustrating situation, so feel free to tell your AHJ he >is not alone. > > >Steve Kowkabany, P.E. >Fire Protection Engineer >Neptune Fire Protection Engineering LLC >616 Davis Street >Neptune Beach, FL 32266 >904-652-4200 Phone >904-212-0868 Fax > >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > >For Technical Assistance, send an email to: [email protected] > >To Unsubscribe, send an email to:[email protected] >(Put the word unsubscribe in the subject field) >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > >For Technical Assistance, send an email to: [email protected] > >To Unsubscribe, send an email to:[email protected] >(Put the word unsubscribe in the subject field) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
