You need to me 3x the dimension of the obstruction, away from the obstruction up to a max of 24". Example 1, a 3" pipe column in the room. You need to be a minimum of 9" away from the obstruction. Example 2 would be a 12" square column in the room. Your sprinkler will need to be 24" away in this case because 3 x 12 = 36 but you are only required to be at least 24" away. Say its' a 26" square column, then you need to be the minimum distance of 24" away from the obstruction. If you are further away, all the better.
Thank You, Bob Knight, CET III 208-318-3057 www.Firebyknight.com -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Aaron Peck Sent: Friday, May 09, 2014 2:48 PM To: [email protected] Subject: Fwd: 3 Times Rule > I'm looking in the 2007 Edition 8.6.5.2.1.3 and what does it mean by "The maximum clear distance required shall be 24 in. In accordance with Figure 8.6.5.2.1.3."? > > Does that mean that if the 3x is more than 24" you can't use the rule or even if it's bigger you ONLY need to be 24" from it? > > I have 12" diameter spiral duct exposed and trying to tell the field guys how far to be from it. So I haven't got confirmation if it's less than 18" below yet but treating it was worst case. This project is light hazard so might be a non issue, especially if it's more than 18" below. > > Sent from my iPhone > Aaron M. Peck, SET Fire Protection > Skype +1(202)407-9079 > Cambodia +855(0)78700407 _______________________________________________ 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
