Not related to the 1.2/1.4 topic, but on the evolution of FM datasheetd, I just recently became aware, that as well as the Datasheets, FM also come out with 'Engineering Bulletins' which are meant to take effect upon publication. These Engineering Bulletins are not available on the FM website. From what I know you have to be signed up for automatic update notification. The recent EB 04-12 (from March 2nd), has massive impact on use of EC spks.
Damien Shannon Provincial Sprinkler Company Ltd. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Morey, Mike Sent: 21 May 2012 19:04 To: [email protected] Subject: RE: Factory Mutual 1.2 or 1.4 FM has come a long way, baby. As far as I've been able to tell you're on the money, only ceiling slope bumps you to the 1.4 "shape factor". You know they dropped their aboveground velocity guidelines in most instances other than that you "should" use Darcy if you're calcing over 30 ft/sec also? There are some new restrictions that are pretty tough though, the non flat obstructions over 4' wide rules are pretty harsh at 4' on center spacing even in non-storage occupancies. Mike Morey, SET, CFPS Sprinkler Designer BMW Constructors, Inc. O: 317.651.0596 | C: 317.586.8111 www.bmwc.com ________________________________ From: [email protected] on behalf of Brad Casterline Sent: Mon 5/21/2012 2:02 PM To: [email protected] Subject: Factory Mutual 1.2 or 1.4 Before this past Saturday morning, if asked, I would have said "I don't think FM requires 1.4 anymore, especially if it is not a high risk occupancy". But before Friday afternoon I was not even aware of FM Data Sheet 3-0 HYDRAULICS OF FIRE PROTECTION SYSTEMS. On page 21, for the Density/Demand Area Format, in a nutshell it says 1.2 for ceiling slopes less than or eq. to 5 degree (1 in 12 i think), and 1.4 for slopes greater than that! Friday I had been reading the product data of a sprinkler head that I had seen Advertised in a mag. (be careful if FM is not the only AHJ) and I saw the above 1.2/1.4 requirement. It was a freak coincidence to shortly realize that it had come from FM, not the manufacturer. Is any one aware of this? Am I just "seeing things" here? Is there more or less to it? thanks, Brad Casterline, NICET IV Fire Protection Division FSC, Inc. P: 913-722-3473 [email protected] www.fsc-inc.com Engineering Solutions for the Built Environment -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachment s/20120521/d9044fff/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum -------------- next part -------------- A non-text attachment was scrubbed... Name: winmail.dat Type: application/ms-tnef Size: 5338 bytes Desc: not available URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachment s/20120521/50c49e57/attachment.bin> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
