I understand hazard classification is based on the fire load and the rates of
heat release of materials and processes being protected. With those
parameters, we choose hazard classification and provide a density for say
Ordinary Hazard Group II - 0.20 gpm/sqft over a design area 1500 sqft to
contain a fire (less if with quick response reduction). I have inspected many
schools and visited their shop classes over the years. Materials, dust, paint
spray booths and the storage of student projects well exceed the 1500 sqft
design areas, so the hazard is present. NFPA 13 - 5.3.1 Ord Haz I may easily
be picked with no quantitative amounts stated. But, the appendix A.5.3.2
suggests as explanatory reference that Wood Product Assembly and Wood Machining
are Ord Haz II with no distinction in commercial or educational use. Pre -
1991 listed Wood Machining as Ord Haz III. I mainly wanted to get the forums
input/debate on how others classified this hazard.
Sincerely,
Joe Kuerzi Jr., SET
On Saturday, April 21, 2018, 6:52:30 PM EDT, Mark.Phelps
<[email protected]> wrote:
I wasn't arguing for light hazard. Only that in my opinion it should be
ordinary 1 and not extra as a commercial shop would be. We at Aero have
installed sprinklers in well over 300 schools and had to argue with both AHJ's
and consultants (present company excluded) over things like running 8" fire
lines into classroom buildings. It's a horrible waste of school funding
resources.
Mark at Aero602 820-7894
Sent from my iPhone
On Apr 21, 2018, at 4:23 PM, Steve Leyton <[email protected]> wrote:
All true, but apples to oranges. A commercial woodshop is a step above a school
woodshop. We do an awful lot of schools work and you would be amazed at what a
modern high school woodshop looks like Mark. Multi station dust collectors are
the norm. It's definitely at least an ordinary hazard. A commercial wood shop
is Extra Hazard, the debate there being whether it's Group 1 or Group 2.
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: "Mark.Phelps"
<[email protected]>Date: 4/21/18 2:15 PM (GMT-08:00) To:
[email protected]: Re: [EXTERNAL] Re: Wood Shop
Classroom Classification of Hazard
The one thing I would add to this is to compare the fire loading between a
commercial cabinet/wood shop and the classroom environment. A typical
commercial shop would have sheet goods and lumber inventory for hundreds of
cabinets, as well as hundreds of boxed finished goods. A typical wood shop
classroom environment would have nothing close to that.
Mark at Aero602 820-7894
Sent from my iPhone
On Apr 21, 2018, at 3:34 PM, Steve Leyton <[email protected]> wrote:
NFPA 13 speaks to the nature of the use, not just the label of a particular
building or compartment. If it has fire load, or processes, or byproduct of
those processes that make it more hazardous, then it's more hazardous. Out here
in California were used to fire protecting vocational technology and science
and shop (auto, wood, metal) classrooms to the higher hazard classification
because they may contain pressurized natural gas, welding or soldering,
flammable liquids, open burners higher levels of dust, etc.
I agree with you - stay the course.
Steve L.
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: joseph kuerzi
<[email protected]>Date: 4/21/18 11:42 AM (GMT-08:00) To:
[email protected]: Wood Shop Classroom
Classification of Hazard
I interpret the hazard classification of 3000sqft Wood Shop Classroom
(High/Middle School) as Ordinary II - Wood Machining/Wood Product Assembly. I
was told that I was incorrect in my classification since it was a classroom and
not a Woodshop Facility. I can not find justification in the standards to down
grade the hazard classification to Light or Ordinary I just because the room
is a classroom. Am I missing something? NFPA 13, 2010ed and IBC 2012
Sincerely,
Joe Kuerzi Jr., SET
Certified Protection Services LLC
175 Sky Aire Rd. NW
Corydon, IN 47112
Fire Protection & Water Back-flow Prevention Systems
Installation, Maintenance, Repair, & Inspections
Contact - Joseph C. Kuerzi Jr., SET
812-738-2970 office
502-551-8530 mobile *preferred
[email protected]
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