Brian, You would need it on both systems per NFPA I believe. The same heat that will activate the heads in the racking will activate the protectowire. I have had one job where the engineer specified ceiling only protectowire which was used for both systems and the AHJ was fine with it. Dewayne
-----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Brian Harris Sent: Wednesday, April 15, 2015 9:39 AM To: [email protected] Subject: Detection for Warehouse Freezer Working on a 30,000 sq.ft freezer with a pre-action system for the ceiling and a pre-action system for the racks, was curious to see what is the preferred way to add the detection. If you use protectowire will it even trip if you install it on the rack piping since there is nothing to collect the heat? Do you only wrap the pipe at the ceiling? Etc? Brian Harris, CET BVS Systems Inc. Sprinkler Division bvssystemsinc.com<http://bvssystemsinc.com/> Phone: 704.896.9989 Fax: 704.896.1935 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.o rg _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
