The IMC says to sprinkler 10-inch diameter and larger ducts where combustibles are handled.
John F. Hoffman, PE* \ Burns & McDonnell Senior Fire Protection Engineer O 816-349-6759 \ M 816-255-4102 [email protected] \ burnsmcd.com 9400 Ward Parkway \ Kansas City, MO 64114 Proud to be one of FORTUNE's 100 Best Companies to Work For Please consider the environment before printing this email. *Registered in: MO -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Todd Williams Sent: Tuesday, March 15, 2016 10:41 AM To: [email protected] Subject: Minimum duct size for sprinklers I am working with a facility that makes envelopes and other office paper products. They have an exhaust duct system which feeds twin collectors outside. The collectors have built in sprinklers and 1" outlets to connect to. The owner wants to connect to the sprinklers in the collector, but a contractor told them they should sprinkler all of the ductwork as well. The largest feed ducts are 16" round, decrease down to 11" round and connect to the machines with smaller duct (all round). My question is what is the minimum size duct you should install a sprinkler in? NFPA 654 had no guidance. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-608-4559 (cell) Sent using CloudMagic [https://cloudmagic.com/k/d/mailapp?ct=ti&cv=6.0.64&pv=8.2] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
