Brad,
I'm not sure I see a "glaring inequality", since the allowable reduction
for using quick response sprinklers would not apply to dry systems.
The increase in remote area for the pitch of the roof is applied equally
to both wet and dry systems.
The increase for dry systems is only applied to dry systems [perhaps
obviously].
The reduction for quick response sprinklers is not allowed for dry systems.
Are you suggesting that it should be?
PARSLEY CONSULTING
Ken Wagoner, SET
760.745.6181 voice
760.745.0537 fax
[email protected] <mailto:[email protected]>e-mail
www.ParsleyConsulting.com <http://www.ParsleyConsulting.com>website
On 2/7/2011 9:50 AM, Brad Casterline wrote:
I would appreciate thoughts and comments from all willing to take the time:
Combustible attic, 4/12 slope, 10' to peak. 1500*1.3=1950 for slope exceeds
2/12. Light Hazard, so QR heads required. If DRY, 1950*1.3=2535. If WET,
1950*.6=1170. (QR Reduction). Doesn't this mean the area has to be increased
over 200% for DRY, not 30%? For 20' to the peak, 1950*.75=1463~~ 170%
increase for DRY. Using SSU, the increase would be for the exact same
spacing and height in both cases. BB and SD Attic heads 'increase' the area
30% for DRY (from 5 to 7 heads), but without regard to height, and the slope
MUST be minimum 4/12. They must be within 6" each side of the peak, at 6'
max. SSU also have to be within 6" each side, and 8' max is cheaper than a
pump. I know this has not come up in the 16 months since I discovered the
Forum. If it did before that, I would appreciate being pointed to the
location of all discussion about it.
Many thanks,
Brad
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