I guess a pdf in a Dropbox is not even really necessary.
What I learned from actually doing the modeling is that a skylight
turns otherwise unobstructed construction into obstructed when the
sprinkler is directly below it-- like Pete cited ~below the main
ceiling like the skylight wasn't there~
And like Roland says about the depth being irrelevant, at 6" deflector
with a 155 QR, 12" depth vs 48" is 1 sec activation time dif (so
that's 18 vs 54 inch deflector).
How can that be?
Like Roland said, it's all about how much of the plume (ceiling jet)
is NOT captured.
Skylights create a kind of upside down obstructed construction!
Brad
Quoting [email protected]:
Hi Forum.
Prompted by the recent deflector distance in skylight thread and
what I said about what Roland said about it and after about three
weeks doing nothing other than imagining what happens -- I did some
modeling on it. Ron G made me aware of the modeling ~5 years ago and
at that time some key words in a Goolge search put it on page one.
But now it seems Roland's modelling is lost somewhere in the R.O.C.
(Republic of China) and you have to sign in to get it.
No way I'm doing that so I did some modeling of my own.
I'll make a pdf and put it in Dropbox by mid next week if there is
any intrest but I can tell you:
when it comes to a mix of obstructed, unobstructed, and the presence
of skylights/small pockets, 9" deflector is the sweet spot.
Thanks,
Brad
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