Im not sure but are we saying that the dry system also supplies the heads IN the top floor dwelling / client rooms ???
There is currently no listed residential sprinkler for dry systems nor the DPV .... the use of dry systems in 13 for residential occupancies requires water delivery time of 15 seconds ..... The NFPA 13 committee put in the permission to do dry residential systems but with the 15 seconds ahead of any such equipment being made just in case it came out before the next cycle. During a test burn we intentionally left water off for one minute past the head fusing just to see .... it didnt go well and the room was beyond the permissible tenability standards of UL1626 prior to suppression. In other words ..... you can do it currently - maybe someday in the future. The attic alone could be a dry system under the rules but if they also drop into the living space we have a problem. Dave P. An AHJ in NJ _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
