I believe this "there are louvers at the base of the skylight that are closed when the room is to be blacked for use." Thus there are there are louvers at the base of the skylight that are OPEN (when the room NOT used?). End of story. Just like folding partitions in a conference room. Sometimes they are open sometimes they are closed, design for both. It the louvers were permanent and closed perhaps then maybe they could omit as a concealed space.
Chris Cahill -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of ParsleyConsulting Sent: Friday, October 22, 2010 1:11 PM To: SprinklerFORUM Subject: Skylights in remote area Looking at a set of plans from a fire protection consultant today, responding to an earlier comment of mine which was: "The sprinklers protecting the skylight area should be flowing in the hydraulic calculations for area X, as there is no physical separation which would allow them to be omitted". The skylights are approximately 144 square feet in area, and approximately 4'-0" deep, protected by a single intermediate temperature upright sprinkler. The response from the designer: "The skylights in room XXX are like a small room or small compartment with a single fire sprinkler for protection; and there are louvers at the base of the skylight that are closed when the room is to be blacked for use. Therefore, per NFPA 13, 2007 ed. Section 22.4.4.6.2 these skylight sprinklers are allowed to be omitted from the hydraulic calculation. All ceiling sprinklers are designed and hydraulically calculated to cover the floor area, including the area below the skylight. The fire sprinkler in the skylights are only protecting the skylight cavity." I disagree with their designation of this area as similar to a closet or bathroom meeting the intent of 22.4.4.6.2. I'd welcome any thoughts on this perspective. -- PARSLEY CONSULTING Ken Wagoner, SET 760.745.6181 voice 760.745.0537 fax [email protected] <mailto:[email protected]>e-mail www.ParsleyConsulting.com <http://www.ParsleyConsulting.com>website _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
