Greg, So the garage is classified as a separate building and the two systems are independent ? Two (2) Hour Rated Wall needs clarification, if it’s a fire wall or PARTY WALL (See 706.1.1 below) then two separate buildings. Ask the architect. That’s the key.
706.1 General. Each portion of a building separated by one or more fire walls that comply with the provisions of this section shall be considered a separate building. The extent and location of such fire walls shall provide a complete separation separation. Where a fire wall also separates occupancies that are required to be separated by a fire barrier wall, the most restrictive requirements of each separation shall apply. 706.1.1 Party walls. Any wall located on a lot line between adjacent buildings, which is used or adapted for joint service between the two buildings, shall be constructed as a fire wall in accordance with Section 706. Party walls shall be constructed without openings and shall create separate buildings. Here's the IBC/IFC Code Sections; [F] 905.2 Installation standard. Standpipe systems shall be installed in accordance with this section and NFPA 14. 905.3.1 Height. Class III standpipe systems shall be installed throughout buildings where the floor level of the highest story is located more than 30 feet (9144 mm) above the lowest level of the fire department vehicle access, or where the floor level of the lowest story is located more than 30 feet (9144 mm) below the highest level of fire department vehicle access. Exceptions: 1. Class I standpipes are allowed in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2. 2. Class I manual standpipes are allowed in open parking garages where the highest floor is located not more than 150 feet (45 720 mm) above the lowest level of fire department vehicle access. 3. Class I manual dry standpipes are allowed in open parking garages that are subject to freezing temperatures, provided that the hose connections are located as required for Class II standpipes in accordance with Section 905.5. 4. Class I standpipes are allowed in basements equipped throughout with an automatic sprinkler system. 5. In determining the lowest level of fire department vehicle access, it shall not be required to consider: 5.1. Recessed loading docks for four vehicles or less, and 5.2. Conditions where topography makes access from the fire department vehicle to the building impractical or impossible. [F] 905.4.2 Interconnection. In buildings where more than one standpipe is provided, the standpipes shall be interconnected in accordance with NFPA 14. 2014 NFPA-14 7.10 Flow Rates. 7.10.1 Class I and Class III Systems. 7.10.1.1* Flow Rate. 7.10.1.1.1 For Class I and Class III systems, the minimum flow rate for the hydraulically most remote standpipe shall be 500 gpm (1893 L/min), through the two most remote 21⁄2 in. (65 mm) outlets, and the calculation procedure shall be in accordance with 7.10.1.2. 7.10.1.1.2 Where a horizontal standpipe on a Class I or Class III system supplies three or more hose connections on any floor, the minimum flow rate for the hydraulically most demanding horizontal standpipe shall be 750 gpm (2840 L/min), and the calculation procedure shall be in accordance with 7.10.1.2.2. 7.10.1.1.3 The minimum flow rate for additional standpipes shall be 250 gpm (946 L/min) per standpipe for buildings with floor areas that do not exceed 80,000 ft2 (7432 m2) per floor. For buildings that exceed 80,000 ft2 (7432m2) per floor, the minimum flow rate for the additional standpipes shall be 500 gpm (1893 L/min) for the second standpipe and 250 gpm (946 L/min) for the third standpipe if the additional flow is required for an unsprinklered building. 7.10.1.1.5 The maximum flow rate shall be 1000 gpm (3785 L/min) for buildings that are sprinklered throughout, in accordance with NFPA 13, Standard for the Installation of Sprinkler Systems, and 1250 gpm (4731 L/min) for buildings that are not sprinklered throughout, in accordance with NFPA 13. Hope that helps, John Drucker, CET Assistant Construction Official Fire Protection Subcode Official Building/Fire/Electrical Inspector Borough of Red Bank Red Bank, New Jersey Email: [email protected] Cell/Text: 732-904-6823 -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Travis Mack Sent: Friday, June 26, 2015 11:14 PM To: [email protected] Subject: Re: standpipes in fire separated building Look in the IBC and see if that 2 hour wall meets the separation requirements for a fire separation. If so, I think you should be able to treat as separate buildings for the standpipe system. Travis Mack, SET MFP Design, LLC "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone > On Jun 26, 2015, at 7:15 PM, Greg McGahan <[email protected]> wrote: > > I am looking a t a high rise building with 2 stair wells attached to a > 7 story parking garage that is not protected. the Parking garage will > have two stairwells and be served by automatic dry standpipes. The > Parking Garage and the High Rise are separated by a 2 hour rated wall. > > Question: Do I have to calculate all 4 standpipes simultaneously or > can I calc each set separately due to the fire separation between the two > areas? > > Thank You, > > > Greg McGahan > Living Water Fire Protection, LLC <http://www.livingwaterfp.com> > 1160 McKenzie Road > Cantonment, FL 32533 > 850-937-1850 > fax 850-937-1852 > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
