So how do you get an OH II design criteria of .15/2000 using ECOH sprinklers? The K14.0 ECOH sprinklers I'm aware of are listed as standard response when used in OH at a 20' x 20' spacing, so QR area reduction isn't allowed. When I look at Figure 11.2.3.1.1, I get .15/4000. Am I missing something?
Ed Kramer Lawrence, KS > Hello, > > We have an existing system installed 20 x 20 with 14.5K ECOH sprinklers. > They have now installed a new wall separating the space into 2 spaces > and left the sprinklers overspaced off the wall. The Calc plate > indicates that the design was originally .15 fpm over 2,000 soft and > when we re-calc the system we are nearly identical to the results > recorded on the data plate. If we calculate it at .20/1,500 it does not > work. > > Question is how to we even begin to sort this out in order to add a row > of new heads to correct the overspacing? The new sprinklers all seem to > be specifically listed for .20 (OH2) and i do not see a loophole to > utilize a lower density and a larger Remote Area as in the original > design. I also do not see an allowance in 13 for such a scenario > (similar to the allowance for modifications to existing systems with > residential heads that were originally designed for less than 7 psi end > head pressure) > > I do not think there will be any salvaging this system if we cannot > reduce the density. > > Thanks for any help, > Greg _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
