As I read this it seems to say that the same rules apply as before but to prove the system size I have to use an approved computer program. Now I'm no math whiz but I can calculate the capacity of a bunch of tubes (pie is square times length equals cubic X, convert X cubes to cubic feet, convert the smelly feet to gallons, add up all the different sized tubes and....). Time consuming but why do I need a multi-thousand dollar program for a task that I can do with paper and pencil?
On Wed, Jun 17, 2009 at 3:57 PM, Roland Huggins<[email protected]> wrote: > nothing changed (except for dwelling units). The 500 gal w/o QOD or > 750 gal limits still apply. The timed approach is just for exceeding > them. As for dwelling units, it is not 15 sec regardless of size. > > Roland > > On Jun 17, 2009, at 3:44 PM, Ron Greenman wrote: > >> So what drove the change from the old way of working trip times (under >> 500 gal. all was good, 500-750 gals. and either 60 seconds or QOD, >> over 750 gals. QOD and all is good)? was it due to systems failing due >> to too long trip times or was it a way to sell an expensive computer >> program? If due to failures did it happen in a cross section of >> buildings or in certain types of buildings and if the latter is it >> necessary to treat all systems equally? Certainly requirements to trip >> test everything to 60 seconds in years past was based on local >> requirements arrived at collectively by AHJs because they wanted it >> and it was complied with enough to become the usual thing to do until >> it became codified--first locally and then in 13. Where's the data >> that supported this costly change at point in this migration from what >> 13 said to what it says now? Enquiring minds want to know. >> > _______________________________________________ > 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) > -- Ron Greenman at home.... _______________________________________________ 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)
