Todd You're getting younger every day.
Bruce Sent from my Motorola ATRIX™ 4G on AT&T -----Original message----- From: Todd Williams <[email protected]> To: [email protected] Sent: Wed, Apr 25, 2012 15:39:31 GMT+00:00 Subject: Re: Rounding off {Squaring off?} See, I'm years behind my time! At 11:09 AM 4/25/2012, you wrote: >I have a 1908 sprinkler with a rotating deflector. Can't read its name, >but looks like MASCO Model C. > >The old IRI collection pamphlet shows also a 1888 Gleason which has one. >Ed Vining >4819 John Muir Rd >Martinez CA 94553 >925-228-8792 >Cell 925-787-0465 > > >On Wed, Apr 25, 2012 at 7:50 AM, Todd Williams <[email protected]> wrote: > >> I won't go into my idea of a spinning deflector to improve water >> distribution (this may have already been done; i'm not sure) >> >> >> At 10:18 AM 4/25/2012, you wrote: >> >Thanks Todd. >> > >> >I was really thinking along these lines. When calc'ing coverage, density >> >and such...we measure linearly right?. And thus, we measure squares of >> >coverage. However, the sprinkler generally throws in a circular pattern. >> >What percentage of a circle lies outside the box once it is drawn inside >> of >> >a circle? I flunked out of Bus. Calc... Might point being, we are proving >> >and being rejected for a few pounds here;gpms there; by what is proven in >> >the box. Not many bucket tests going on. Do we conservatively give away >> >this advantage because squares are easier to deal with mathematically? >> >Also, aren't most sprinklers conservatively rated. I have seen a standard >> >head throw well beyond 7'6" or 9'-0" for that matter. Oh, and this just >> in, >> >{they never stop these days...} As the water stream hits the deflector and >> >is deflected outwards, wouldn't a circular shadow be formed directly under >> >each head? This would also subtract another percentile from what is >> >actually "in the box" I guess that would be a negative though. >> > >> >This is all rhetorical and is just an exercise in learning and creative >> >thinking. >> > Teach your kids to read. Teach your kids to question everything they >> read. >> >Teach them to question everything... George Carlin. >> > >> >On Tue, Apr 24, 2012 at 1:50 PM, Bruce Verhei <[email protected]> >> wrote: >> > >> >> I've read in the past that this fell in the not well understood effect >> >> category when engineers have desired to model how sprinklers actually >> work. >> >> This seems to be difficult. They say something that ends with but >> >> sprinklers installed and maintained to standards have a remarkable >> record >> >> of controlling fires in buildings. >> >> >> >> I want to buy one of the square heads. Are the threads square too? >> >> >> >> Bruce >> >> >> >> Sent from my Motorola ATRIX 4G on AT&T >> >> >> >> -----Original message----- >> >> From: Thomas Watt <[email protected]> >> >> To: [email protected] >> >> Sent: Tue, Apr 24, 2012 13:05:01 GMT+00:00 >> >> Subject: Rounding off {Squaring off?} >> >> >> >> I had a brain-fart and came up with this question for the forum. >> Especially >> >> the engineers. Since sprinklers, in general, throw in a circular >> pattern, >> >> and we calc the sprinklers as squares, there is always overlap so we >> are by >> >> default miscalculating a percentage of the density. Has anyone ever >> >> calculated the safety factor effect by ignoring the arcs outside the >> >> square??? >> >> >> >> Thomas >> >> A+ fitter/Foreman >> >> No work in Orlando, FL area >> >> Willing to relocate >> >> -------------- next part -------------- >> >> An HTML attachment was scrubbed... >> >> URL: < >> >> >> http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120424/5639c5b1/attachment.html >> >> > >> >> _______________________________________________ >> >> Sprinklerforum mailing list >> >> [email protected] >> >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >> >> -------------- next part -------------- >> >> An HTML attachment was scrubbed... >> >> URL: < >> >> >> http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120424/50c0be9e/attachment.html >> >> > >> >> _______________________________________________ >> >> Sprinklerforum mailing list >> >> [email protected] >> >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >> >> >> >-------------- next part -------------- >> >An HTML attachment was scrubbed... >> >URL: < >> http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120425/ce2f2be7/attachment.html >> > >> >_______________________________________________ >> >Sprinklerforum mailing list >> >[email protected] >> >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >> >> Todd G. Williams, PE >> Fire Protection Design/Consulting >> Stonington, CT >> 860.535.2080 >> www.fpdc.com >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >> >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120425/6a504f5b/attachment.html> >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum Todd G. Williams, PE Fire Protection Design/Consulting Stonington, CT 860.535.2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum -------------- next part -------------- An HTML attachment was scrubbed... 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