I disagree, I was taught that the MINIMUM is 5, if thats less than 75 feet you got up (to more heads), if over 75' you calc 5
On Tue, Jul 6, 2010 at 3:30 PM, Ed Kramer <[email protected]> wrote: > > In the 2007 of 13, the rules for the room design method were > > modified. There is now language which states "or when extended > > coverage sprinklers are installed, all sprinklers within 75 linear > > feet of the corridor". Does this imply that fewer than 5 may be > > calculated (i.e 4 sprinklers at 20'). > > Todd, I believe that is correct. > > > If you have a mix of standard > > and extended coverage sprinklers in a corridor (standard in the > > corridor and xcov at the 16x16 corridor junction), that we have to > > expand the area out to the 75ft? > > Solely my own interpretation, but I think the intent would be to calc 5 > sprinks. The concept of calcing 75' if using EC sprinks comes from the > distance you'd be calcing if using standard-coverage sprinks at max spacing > (5 sprinks x 15'). The new wording in '07 is to ensure the designer > doesn't > get penalized when using EC sprinks at max spacing. > > So, though it doesn't say it this way, I think the intent when using a mix > of EC & SC sprinks is to calc the most demanding 5 sprinks or the most > demanding 75', whichever is less. > > Ed Kramer > Littleton, CO > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email > to:[email protected]<to%[email protected]> > (Put the word unsubscribe in the subject field) > -- Tom Poisal, CET _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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)
