Depending upon the version of ubc/IBC you're on, using 13R can also require you to extend "Separations" to the roof at the walls that divide the hall and unit to unit spaces.
Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of George Church Sent: Wednesday, November 25, 2009 10:20 AM To: [email protected] Subject: RE: concealed space And you can't use 13R under the 2006 IBC if the design team used the sprinkler increase in order to build it, you can add a story but the SF increase must come from frontage or other, non-sprinkler factors. Doubt this applies to YOUR building as it could also be under the Int'l Existing Building Code. I'D BE AMAZED IF A SCHOOL CONVERTED TO APTS IS ABLE TO BE PROTECTED APPROPRIATELY BY NFPA 13D !!!!!!!! We've done 2 schools and a church converted to apts in the past year, all 13R. There isn't a lot of difference in cost to do it correctly (13R) and if you need to, have em add some 8' deep lintels where the living room ends and a corridor to bedrooms start- you'll not have to flow the corridor heads in that calc with the living/dining/kitchen area. This can get you down to a 2 or 3 head calc, max 4 in 13R. The little country church ended up as a 2-head flow, a challenging 35 GPM at 30 PSI for a water supply- the developer had to change the well pump, big deal. While you may find something on the AFSA site comparing 13r and 13D, the text is available for free reading at www.nfpa.org codes and standards, list of codes and standards, click on 13r, applicable edition in your jurisdiction, and then down at the bottom of the page, click on PREVIEW THIS DOCUMENT and fill out the questionnaire if you aren't logged in already. David offers wise words WRT the IBC impact, although you likely don't have balconies in a school->apt conversion. To ALL my friends on the Forum, best wishes for a thoroughly enjoyable thanksgiving respite. George Church Rowe Sprinkler -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of David Blackwell Sent: Wednesday, November 25, 2009 9:14 AM To: [email protected] Subject: RE: concealed space Double check your NFPA 13D scope. NFPA 13D is only applicable to buildings which are: one-family dwellings; two-family dwellings; and, manufactured homes. Per the 2007 handbook commentary to NFPA 13D 1.1: "...NFPA 13D is inappropriate for multifamily occupancies. A multifamily occupancy contains three or more dwelling units." Apartments are normally designed to (at least) NFPA 13R, if not NFPA 13. Note if the (2006) IBC is the applicable in the jurisdiction your building is located, it affects the design of your sprinkler system. Note that IBC 903.3.1.2.1 (for balconies and decks) requires more sprinkler coverage than NFPA 13R requires; and, the requirements in IBC 903.4 may affect the choice of type of valve supervision used. David W. S. Blackwell, II, PE, CFI-I, CFPE Engineering ---------------------------------------------------------------- Office of State Fire Marshal 141 Monticello Trail Columbia, SC 29203 Phone: 803.896.9833 Fax: 803.896.9806 Email: [email protected] OSFM Website: http://www.llr.state.sc.us/firemarshal.asp ---------------------------------------------------------------- -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Karen Purvis Sent: Wednesday, November 25, 2009 8:52 AM To: [email protected] Subject: concealed space I have checked the archives and can not find what I am looking for. I have an old school building with an attic area that is not accessible and a 6' crawl space with no equipment. Building is all wood. They are redoing the building into apartments (13D). For some reason I remember someone telling me or reading that in a 13R or 13D system if the areas mentioned were net being used or accessed then they did not need to be sprinkled. Is this something I dreamed up? Karen Purvis Senior Designer Facility Systems Consultants 713 South Central Street, Suite 101 Knoxville, TN 37902 ph.865-246-0164 fax 865-246-1084 _______________________________________________ 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) _______________________________________________ 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)
