And I will be very interested to find what "code" they're referring to.
I submit that if one is to consider the spray foam insulation as
unobstructed as defined by -13, then the deflector position relative to
the bottom level of the foam is required to be between 1" and 12" per
10.2.6.1.1 ('22 edition).
If the bottom of the insulation is to be considered as obstructed, or
the foam is between members which are obstructed, then the deflector
must be 1" to 6" below the member, but no greater than 22" down from the
ceiling/roof deck above, per 10.2.6.1.2 ('22 again).
I can't wait to learn the rationale behind such a requirement.
In short, remember my oft repeated mantra, whenever someone pops up with
something like this: Prove it.
keep the forum informed, ok?
*Ken Wagoner, SET*
*Parsley Consulting
500 West Mechanic Street
Harrisonville, Missouri 64701-2235*
*Phone: (760) 745-6181 *
*Visit the website
<https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fwww.parsleyconsulting.com%2f&c=E,1,Y5zKJKPEh1mBEBqSR-VE9cUKl5y-eyP8BpvmE_5j9ZqW2eJbNphYzrCMBZ-2YuX6d-RRkHI4gQ1FV-cvOeCfRC58uZS9NiToZv2mx7909oCqLvCW_n5hDHeK&typo=1>*
On 9/28/2023 2:12 PM, Brian Harris wrote:
The AHJ is supposed to be providing the “code” where this came from.
Should be interesting.
*Brian Harris, CET*
BVS Systems Inc.
bvssytemsinc.com <http://bvssystemsinc.com/>
*From:*Eric Rieve <[email protected]>
*Sent:* Thursday, September 28, 2023 2:54 PM
*To:* Discussion list on issues relating to automatic fire sprinklers
<[email protected]>
*Subject:* [Sprinklerforum] Re: Spray Foam Insulation
Funny enough I was told the same a few years ago. His reasoning was
that the uneven nature of the foam application could cause
obstructions that weren’t readily apparent so extra clearance was
warranted.
*From:*Brian Harris <[email protected]>
*Sent:* Thursday, September 28, 2023 2:48 PM
*To:* [email protected]
*Subject:* [Sprinklerforum] Spray Foam Insulation
Anybody ever have an AHJ say you need 4” clearance from the bottom of
spray insulation to the deflector?
*Brian Harris, CET*
BVS Systems Inc.
bvssystemsinc.com
<https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fbvssystemsinc.com%2f&c=E,1,wo5wYVtpGosaBntgPq_5rudqm8ADj3XpDv10H3ACDcs2pNvWgifdhkbEDh5cNdO54rGdJmuywOvI-uxu4wi0CjpghGrXuaIGLLlPSAjRPh_ujRUBa-eEnA,,&typo=1>
Phone: 704.896.9989
Fax: 704.896.1935
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