Yes, it is the collapsible type.
*From:* Sprinklerforum [mailto: [email protected]] *On Behalf Of *Prahl, Craig/GVL *Sent:* Wednesday, November 08, 2017 4:29 PM *To:* [email protected] *Subject:* RE: Fabric Ductwork - ESFR obstruction? Some of the fabric duct is designed not to collapse. I’m assuming this has been verified as not being that type? *Craig L. Prahl* Fire Protection Group Lead/SME *CH2M* 200 Verdae Blvd. Greenville, SC 29607 Direct - 864.920.7540 Fax - 864.920.7129 CH2MHILL Extension 77540 [email protected] *From:* Sprinklerforum [ mailto:[email protected] <[email protected]>] *On Behalf Of *Dewayne Martinez *Sent:* Wednesday, November 08, 2017 5:06 PM *To:* [email protected] *Cc:* [email protected] *Subject:* Fabric Ductwork - ESFR obstruction? [EXTERNAL] NFPA 13, 07ed ESFR System What are the obstructions rules concerning a fabric supply duct installed below an ESFR system. The RTU will shut down and collapse the duct under any of the following conditions – Flow switch activation, heat detector and pull stations. I don’t think it should be considered an obstruction but we have a AHJ that is concerned that there could be up to a 60sec delay if the collapse is triggered by the flow switch and is requiring sprinklers below unless we can show otherwise. Thanks, Dewayne
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