Could be, and I guess I can goof, but the formula for measuring the volume of a cylinder has been around for a long time and as far as I can tell works pretty well. I also know that without being able to estimate a result I wouldn't know that I err far more often punching buttons on a calculator than I do writing equations on a white board or piece of paper. Who knows how many mistakes I make entering multiple data points into a complex program where I'm unable to even guess at what a likely result should look like? I have to be missing something here. I know all the committee guys are too honest to put something in a code that can only be accomplished with some expensive proprietary do-dad.
On Wed, Jun 17, 2009 at 4:26 PM, Todd Williams<[email protected]> wrote: > Could it have something to do with the fact that the multi-thousand > dollar program is UL listed and your smelly feet aren't? > > > At 07:19 PM 6/17/2009, you wrote: >>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) > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, Connecticut > www.fpdc.com > 860.535.2080 > _______________________________________________ > 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)
