Are the sidewalls within the pocket capable of discharging at the same rate as the pendants? If they are not then they do not meet the EH criteria for the space. Even if there is a ceiling pocket, it is not excluded from the criteria set forth for the room. If the room is based on an EH design criteria, then the whole room needs to be. You're not protecting the ceiling, you're still protecting the space below.
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.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, April 17, 2008 9:09 AM To: [email protected] Subject: Extra Hazard Ceiling Pockets Forum, Let me know what you guys think about this situation. I have a college lab building where the AHJ bumped us up to Extra Hazard Occupancy in the Basement due to storage of flamabile liquids. The labs in the basement have a 3 foot deep ceiling pocket above the experiment table in the center of the room. We spaced pendents at extra hazard spacing throughout the room at the lower ceiling level. We then added two sidewall sprinklers in the ceiling pocket itself. The question as arisen whether we can use sidewalls because the room is to be designed at extra hazard. My therory was that the floor level is protected to extra hazard from the pendents and the sidewalls are only protecting the ceiling pock itself and not the room below. Does anyone agree/disagree with my reasoning. This email is intended for named recipients only. _______________________________________________ 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) _______________________________________________ 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)
