I believe typically the same rule applies, looking at a random datasheet for a Viking extended coverage head that is FM approved it lists in the FM design guidelines "Maximum coverage areas" with the footnote that you use the next larger coverage area if yours doesn't match one of the choices. As the options are all square like the UL listing I would say you'd treat it the same way.
Mike Morey CFPS 3229 • NICET S.E.T. 123677 Project Manager • Fire Protection Group Shambaugh & Son, LP an EMCOR Company 7614 Opportunity Drive • Fort Wayne, IN • 46825 direct 260.487.7824 / cell 260.417.0625 / fax 260.487.7991 email [email protected] From: <[email protected]> To: <[email protected]> Date: 07/11/2019 01:00 PM Subject: EC Heads in an FM Job Sent by: "Sprinklerforum" <[email protected]> BE ADVISED - This email originated outside EMCOR. First off I’ve never used EC Sprinkler on an FM job, nor do I have much experience with FM to begin with. I’ve always rounded up to the used the square spacing requirement from data sheets i.e 14x14, 16x16 etc. when the sprinkler spacing was less than full square. When in FM I would assume you do the same. But I’ve been told this is not the case. I’ve read through some of the FM sheets an can’t find where is clearly say one way or the other. Can someone shed some light on this. Jerry Van Kolken Millennium Fire Protection Corp. 2950 San Luis Rey Rd. Oceanside, CA 92058 (760) 722-2722 FX 722-2730 _______________________________________________ Sprinklerforum mailing list [email protected] https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkler.org_listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DwICAg&c=GKdB6-XpYq_0W-WluyVHtw&r=z4t2hrRBa-JsS06T4X_uuYOSJoclVWgSRO8Nq6TDdsg&m=Y2SqgIGJLuUYiOVmkw1ryUf1Zwd_O7KBqtlIC1M9seE&s=5msY_jEtbvt_jcRXyN4fRcVjrOLguKE3nj01h0YcJ_4&e= This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient.
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