: RE: [EXTERNAL] RE: Sprinklerforum Digest, Vol 83, Issue 6
You can't use that head on a pre-action system, can you?
-Kyle M
-Original Message-
From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org]
On Behalf Of Anthony C via Sprinklerforum
Sent: Thursday, February 27
Gentlemen
Another thing to look at is the height of the building above the storage,
this height wasnt mentioned in the original post and may not be an issue
but should be looked at, See NFPA 13-12.1.3.4 Clearance to ceiling.
Specific to your commodity would be section 12.1.3.4.4 -12.1.3.4.5
The only reference to clearance is for structural members
NFPA 13 – 2016 edition: 9.3.4.9 The installed horizontal and upward vertical
clearance between horizontal sprinkler piping and structural members not
penetrated or used, collectively or independently, to support the piping shall
be
Here is what NFPA 13 -2019 edition states:
3.3.41.2* Unobstructed Construction. Construction where
beams, trusses, or other members do not impede heat flow
or water distribution in a manner that materially affects the
ability of sprinklers to control or suppress a fire. Unobstruc‐
ted
Did you all notice what the appendix to 3.7.1 Definition of Panel construction.
A.3.7.1 Obstructed Construction. The following examples of obstructed
construction are provided to assist the user in determining the type of
construction feature:
(4) Panel Construction. The term panel
