If the FDC only covers a portion of a building, a sign must be present, 8.16.2.4.5. There does not appear to be anything that specifically prohibit what you are indicating, however I would not necessarily support it.
>From a fire department perspective, I do not necessarily support not >connecting the FDC's together. If they are separate, it works fine if you pull >up and know what system is activated. The problem is that the fire department >pulls up and connects and supplies the wrong system (Murphy and fire fighters >cross paths often). The second scenario is that the former exterior wall is >removed and now you have a fire between the two systems. Which one does the >fire department supply first? Pose this question to the AHJ now. The department that I am with had this same issue in a meat packing plant not so long ago and the sprinkler contractor installed two separate FDCs. They had to go back in and add an 8" to connect the systems. Good Luck Tim Frankenberg, CFPS Captain, Washington (MO) FD >>> [EMAIL PROTECTED] 3/1/2007 3:57 pm >>> You mean 8.16.2.4.3? That's for multiple system control valves on a common manifold that would share a common run-in. It's just saying where the FD piping connection should attach to the risers between the supply (OS&Y) control valve and the System (Alarm Check) valves. If you're running new UG to this new addition, it's a totally separate system from the other part of the building and doesn't need to have anything to do with the existing. Let it stand on it's own. As far as 8.16.2.4.5, what they are alluding to there is if for example a system only serves from columns a-f on the south side of the bldg then there should be a sign stating such. That way the FD knows which riser is serving what portion of the building. Craig L. Prahl, CET Fire Protection Group 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.lg.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Kramer Sent: Thursday, March 01, 2007 4:28 PM To: [email protected] Subject: FDC's on multiple systems Run into something new that I need opinions on. An addition is being added to an existing building. Existing building is fully sprinklered. The total area of the combined existing and new structure exceeds 52,000 sf and the existing system riser is in the far corner away from the addition. So the decision was made to bring in a new underground supply to serve the new addition. Thus the new addition will have its own independent system riser and fire department connection. Does 2002 NFPA 13 section 8.16.l2.4.3 (or any other section) require the two FDCs (one existing, one new) be tied together? The commentary hints at this, but I've never thought that was the intent. I thought the intent was that multiple systems SERVED BY THE SAME UNDERGROUND LEAD-IN be served by the same FDC. Section 8.16.2.4.5 seams to support this. Opinions? Ed Kramer Littleton, CO _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
