The 13R origins and development statement says it all. The standard was clearly promulgated to facilitate sprinklers in low rise, 4 story or less, residential facilities. Nowhere is the term mixed use or mixed occupancy referenced. I believe there's a misconception of what constitutes a residential or a mixed use.
A residential building with a private parking garage serving the residents and incidental use spaces such as mail rooms, lobbies, exercise rooms, trash and utility rooms, manager's office is considered a single R Use pursuant to the IBC/IFC. This is not a mixed use. 13R is the appropriate standard for this building. The entire system is classified 13R not a 13/13R "hybrid" something that simply doesn't exist. Yes you need selected sections of 13 to sprinkler outside the dwelling units nonetheless its 13R that gets you there, parts of 13 in effect are a reference, in the end the system is 13R. (PS, 13R committee, take what you need out of 13 put it in 13R and be done with it) A residential building with a public garage, restaurants, offices, retail is a mixed use building pursuant to the IBC/IFC. This is not a single R Use. 13 is the appropriate standard for this building. The entire system is 13. Unlike 13R, 13 does not reference 13R. Origin and Development of NFPA 13R (Extracted From 2007 NFPA-13R, EMPHASIS added) The first edition of NFPA 13R, which was published in 1989, represented a milestone in the development of sprinkler installation design standards. The first edition resulted in a standard for the protection of low-rise, RESIDENTIAL facilities. This standard is intended to provide a higher degree of life safety and property protection to the INHABITENTS of low-rise, multifamily DWELLINGS. Promulgated as a document that provides for increased levels of protection to BUILDING OCCUPANTS, the document also considers the economic aspects of a sprinklered facility as compared to an unsprinklered facility. As the number of states and cities that implement sprinkler ordinances continues to grow, and as the threshold levels for sprinkler requirements in RESIDENTIAL occupancies in the building codes extend to certain low-rise structures, it is believed that systems for certain RESIDENTIAL occupancies can be efficiently and effectively installed in accordance with this standard. The 1994 edition provided expanded information on nonmetallic pipe materials, minor changes to clarify the established design criteria, and a new recommendation on underground pipe materials. The 1996 edition included several changes that paralleled amendments in the 1996 edition of NFPA 13, Standard for the Installation of Sprinkler Systems. Other changes included a number of clarifications concerning the selection of sprinklers as well as the proper use of sprinklers. The 1999 edition clarified criteria for nonmetallic pipe and fittings and established a minimum operating pressure for sprinklers. Guidance on providing freeze protection using insulation in attics and antifreeze systems was provided, as was information on the application of solvent cement for nonmetallic piping. Exceptions for omitting sprinkler coverage in closets on balconies and underneath garage doors were added. The 2002 edition incorporated revisions to update the standard to comply with the 2000 edition of the Manual of Style for NFPA Technical Committee Documents. These revisions included editorially rewording any exceptions as requirements. The 2002 edition also included changes that further clarified the scope of the standard, established a minimum design discharge density, and added protection requirements specifically for garages. The section addressing spaces where sprinklers are permitted to be omitted was changed so that the area of full-height tub/shower enclosures would be included in the area determination for bathrooms, sprinklers would be provided in concealed spaces with fuel-fired equipment, and the omission of sprinklers in elevator machine rooms would not be dependent on the room's location. This 2007 edition now includes spacing and obstruction rules addressing sloped ceilings, ceiling pockets, ceiling fans, and kitchen cabinets. For this edition, the requirements for utilizing quick-response sprinklers within NFPA 13R regulations were clarified, and new requirements addressing architectural features within dwelling units were added. Additionally, the requirements covering closets, including obstructions within closets and protection of mechanical closets, were clarified. Finally, new requirements were added that are applicable from NFPA 13 to NFPA 13R, to ensure proper administration of those requirements where relevant. Hope that helps. Sincerely John Drucker Fire Protection Subcode Official Building/Fire/Electrical Inspector Safe Buildings Save Lives ! _______________________________________________ Sprinklerforum mailing list http://lists.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)
