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
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