The 4 times rule is for e/c heads. Std. heads is 3 times and max. 24" from obstruction. So, if head is placed minimum 24" away (assuming std head), it's okay. (Although doesn't make sense if the obstruction is, say 5 feet wide. As always, some common sense has to be applied, when using some requirements of NFPA)
Tony -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian Harris Sent: July 14, 2008 12:36 PM To: [email protected] Subject: Sprinkler Pattern Obstructions Forum, I know I must be reading this wrong but as usual I am in a hurry and could use some help. NFPA-13 (2007) 8.8.5.2.1.3 states that the sprinkler shall be positioned a minimum of 4 times the maximum dimension of the obstruction, but then it goes on to say a maximum of 36" clear space. In my case I have a 24" column I'm trying to avoid which by the 4 times rule would get me 8' away, how does the max. 36" clear come into play? Also look at Figure 8.8.5.2.1.3, I'm so confused ........ Regards, <http://www.firstdefensefire.com/> E-mail message checked by Spyware Doctor (6.0.0.354) Database version: 5.10250e http://www.pctools.com/en/spyware-doctor-antivirus/ _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
