Amendments to the 2006 International Fire Code
ARTICLE VII. FIRE PREVENTION CODE
sec. 6-101. Adoption of the International Fire Code 2006 Edition.
The provisions of the International Fire Code/2006 edition published by the International Code
Council, are hereby adopted by this reference, subject only to the additions, deletions and
modifications specifically set forth in section 6-102 of this code.
sec. 6-102 Additions, deletions and modifications of the international fire code 2006 edition.
The following sections of the aforesaid international fire code- 2006
edition are hereby amended, deleted or modified as hereinafter set forth:
101.1 Title. Insert "the Village of Northbrook, Cook County, Illinois" for [name of
102.6 Referenced Codes and Standards: Delete entire section and revise as follows; The
codes and standards referenced in this code shall be those that are listed in Chapter
45 and such codes and standards shall be considered part of the requirements of this
code to the prescribed extent of each such reference. Where differences occur
between the provisions of this code and the referenced standards, the most stringent
provision shall apply.
108 Board of appeals; Delete entire section.
109.3 Violation penalties: Delete entire section
110.5 Fire Watch: Add a new section; Where conditions exist that are deemed
hazardous to life and property by the code official, a fire watch shall be
implemented. The code official shall determine the number of personnel
required and the duration necessary for the fire watch. An hourly fee as provided
in the Village of Northbrook Annual Fee Ordinance shall be charged for each
Village of Northbrook personnel assigned to the fire watch. Conditions that may
require a fire watch shall include but are not limited to, the following:
1. newly constructed building opened for occupancy prior to
completion of the fire safety equipment and supervision;
2. building in which the fire safety equipment and supervision is
placed out-of-service and will not be restored within two (2)
3. building with an occupancy load greater than the posted
4. special programs or events where there will be space for standing
room over the seating area and the exits will handle both seated
and standing people; and
5. situations where the fire-load is greater than the normal day-to-
111.4 Fines for failure to comply. Delete all words after “fine” to end of subsection
and substitute “as established in section 1-13 of the Northbrook municipal 307.3
112 Adopted Standards, Add a new section, "The following NFPA Standards are to
be adopted in their entirety. The appendixes of all adopted NFPA standards are
to be considered as a part of each standard and are considered a "shall"
requirement and not "should" information". This will require all system
installations to be installed per NFPA requirements and NFPA recommendations
for good engineering practices and installations.
NFPA 10 Portable Fire Extinguishers 2002 edition
NFPA 13 Automatic Sprinkler Systems 2002 edition
NFPA 13R Sprinkler Systems in Residential Occupancies
NFPA 13D Installation of Sprinklers in One and Two-Family
Dwellings 2002 edition
NFPA 14 Standpipe and Hose Systems, 2003 edition
NFPA 15 Water Spray Fixed Systems 2001 edition
NFPA 16 Installation of Foam Water Sprinkler and Foam Water
Spray Systems 2003 edition
NFPA 20 Installation of Centrifugal Pumps, 2003 edition
NFPA 24 Installation of Private Fire Service Mains and their
Maintenance 2002 edition
NFPA 25 Inspection, Testing and Maintenance of Water Based
Fire Protection System 2002 edition
NFPA 70 National Electrical Code 2005 edition
NFPA 72 National Fire Alarm Code, 2002 edition
NFPA 96 Installation of Equipment for the Removal of Smoke
and Grease Laden Vapors for Commercial Cooking
Equipment, 2003 edition
NFPA 1123 Fireworks Display 2000 edition
NFPA 1124 Manufacture, Transportation, storage and retail sales of
fireworks and pyrotechnics 2001 edition
307.4.1 Bonfires: Add after last sentence; Bonfires shall not exceed 4 feet in diameter
and/or 16 square feet. Bonfires may only contain cut, natural wood.
307.4.2 Recreational Fires: Add after last sentence, Recreation fires shall be contained
in a manufactured and approved outdoor container. Containers for recreational
fires shall be no greater than 30 inches in diameter and/or 6.25 square feet.
Recreation fires may only contain cut, natural wood that will fit within the
confines of the container.
307.5 Attendance: insert at the end of this subsection; The Code official may require a
fire watch consisting of a fully manned fire suppression apparatus, if in his/her
opinion the conditions of the permit request deem it necessary. The cost of this
fire watch shall become the responsibility of the applicant.
503.1.4 Public/Private access for fire apparatus: Add new subsection as follows, Public
or private access, for all occupancy classifications with the exception of R-3 shall
be provided for fire apparatus when the building is three stories or higher. Fire
lane access for an aerial ladder and/or mechanically elevated mechanism shall be
required to cover three-quarters of all exterior-building walls.
503.2.1 Dimensions: Add after last sentence, "The road shall be constructed with the
capability to handle 80,000 pounds (weight of fully loaded fire apparatus)".
506.1.2 Location and Number - Knox Box Location: Add new subsection as follows,
Any building or structure that is required to have a fire suppression system
consisting of an automatic sprinkler, pursuant to Section 906.0, shall be equipped
with a fire department-approved key box, also known as a “Knox Box” meeting
the following requirements:
a. All Knox boxes shall be installed on an exterior portion of a
building or structure in a location approved by the code official.
This will typically be above the fire department sprinkler
b. The Knox box shall be mounted at the height of sixty – seventy-
two inches above the finished floor.
c. The Knox box shall contain keys allowing access to all common
entry doors to the building, the door to the automatic water
sprinkler fire suppression system control room, and the fire
alarm panel servicing said building or structure.
d. All new “Knox boxes” shall be supervised in the trouble mode of
the fire alarm system.
e. The total number of Knox boxes required for occupancy shall be
determined by the Code Official.
506.3 Electric Shunt Switch: Add new subsection as follows, An electric Knox
shunt/shut off switch shall be required in buildings of all use groups with
multiple electric services. The switch will be mounted next to main Knox box or
at a location specified by the fire code official.
a. Switch should be mounted at a height of 6 (six) feet from the finished floor.
b. The Knox box shall be clearly identified as EMERGENCY ELECTRICAL
507.4 Wood Truss Warning Sign: Add new subsection as follows, The owner of any
commercial, industrial structure which has a wooden truss roof assembly shall be
required to mount warning signs meeting the following minimum requirements:
1. Size and Construction: A four (4”) red metallic letter ‘T’ sign
located on the front and rear entrances (preferably under the
building address), or in a location to be determined by the Fire
Prevention Code Official.
2. Property owner responsibility: It shall be the responsibility of
each property owner to mount, maintain, and prevent obstruction
of any warning signs required to be mounted on the building or
508.5.7 Fire Department Connections: Add new subsection as follows, Hydrants shall
be located within 100 feet to any fire department sprinkler or standpipe
connection as determined by the code official.
510.2 ACCESS TO FIRE EQUIPMENT: Add new subsection as follows, In other
than 13D sprinkler systems, in multiple single-family dwellings where there
is no common area, fire alarm panels and sprinkler system valves shall be
located in a room accessible only to fire district personnel from the exterior
of the building. The fire department shall have access at any time to such
equipment without entering an individual dwelling unit or private space.
607.1.1 Automatic Elevators for Fire Department Use: Add new subsection as follows,
At least one of the elevators installed in all new buildings shall be sized for
stretcher use by the fire department. The minimum cab size to be 2500 pounds
capacity with a clear inside dimension of 80" wide x 51" deep with a 42” side
slide door. The finish rail height shall be between 36" and 38" on sidewalls. For
elevators with center door openings, the minimum distance between walls shall
not be less than 80" wide by 65" inches deep with a clear opening of not less than
609.3 Hood System Suppression: Add new subsection as follows, All hood and duct
extinguishing systems shall comply with the Underwriters Laboratories Standard
No. 300 and be supervised by the building's fire alarm system.
901.2.2 Fire Alarm Installer Credentials: Add new subsection as follows, Fire alarm
system installers must have a Private Alarm Contractors license issued by the
Illinois Department of Professional Regulation to install, repair or modify fire
1. A Licensed Electrical Contractor is exempt from obtaining a
“Private Alarm Contractor’s License.
901.2.3 Fire Alarm Design Credentials; Add a new subsection as follows, Fire alarm
designers must be either NICET Level III certified or a State certified Physical
SECTION 902 DEFINITIONS
That the following definition is added to Section 902 and shall read as follows:
TOTAL AREA: For purposes of calculating total square feet and fire areas, the total floor
area includes mezzanines and basements contained within the surrounding exterior walls of
the building on all floors and levels, which are added together. The area included within the
surrounding exterior walls of a building including roof overhangs, extensions, and all
enclosed extensions, which are also added to the calculation. Areas of a building not provided
with surrounding walls shall be included within the building area if such areas are included
within the horizontal projection of the roof or floor above. Interior walls, including fire
walls, and party walls, shall not be considered as walls which divide a structure into two or
more separate buildings, but a structure containing such interior walls shall be considered as
one building for the purpose of this section.
903.2.1.1 Group A-1: Delete and revise as follows, An automatic sprinkler system shall be
provided throughout all Group A-1 occupancies.
903.2.1.2 Group A-2: Delete and revise as follows, An automatic sprinkler system shall be
provided throughout all Group A-2 occupancies.
903.2.1.3 Group A-3: Delete and revise as follows, An automatic sprinkler system shall
be provided throughout all Group A-3 occupancies.
903.2.1.4 Group A-4: Delete and revise as follows, An automatic sprinkler system shall be
provided throughout all Group A-4 occupancies.
903.2.1.5 Group A-5: Delete and revise as follows, An automatic sprinkler system shall be
provided throughout all Group A-5 occupancies.
903.2.1.6 Group B: Delete and revise as follows, An automatic sprinkler system shall be
provided throughout all Group B occupancies.
903.2.2 Group E: Delete and revise as follows, An automatic sprinkler system shall be
provided throughout all Group E occupancies.
903.2.3 Group F-1: Delete and revise as follows, An automatic sprinkler system shall be
provided throughout all Group F-1 occupancies.
903.2.4 Group H: Delete and revise as follows, An automatic sprinkler system shall be
installed in all Group H occupancies.
903.2.5 Group I, Delete and revise as follows, An automatic sprinkler system shall be
installed in all Group I occupancies.
903.2.6 Group M: Delete and revise as follows, An automatic sprinkler system shall be
installed in all Group M occupancies.
903.2.7 Group R, Delete and revise as follows, An automatic fire sprinkler system shall
be installed in all Group R occupancies.
903.2.8 Group S-1, Delete and revise as follows, An automatic sprinkler system shall be
installed in all Group S-1 occupancies.
903.2.8.1 Repair Garages, Delete and revise as follows, An automatic sprinkler system
shall be installed in all repair garage occupancies.
903.2.8.2 Bulk Storage of Tires, Delete and revise as follows: An automatic sprinkler
system shall be installed in all Bulk Storage of Tires buildings.
903.2.9.1 Group S-2, Delete and revise as follows, An automatic sprinkler system shall be
provided throughout all buildings classified as an enclosed parking garage.
903.2.9.1 Commercial parking garages, Delete and revise as follows, An automatic
sprinkler system shall be provided throughout all buildings used for storage of
commercial trucks, trailers, transport container units or buses.
903.2.10 Windowless story in all occupancies, Delete all exceptions
903.2.10.1 Stories and basements without openings, Delete and revise as follows, An
automatic sprinkler system shall be installed in all stories and basements without
903.2.10.1.2 Openings on one side only, Delete and revise as follows, Where openings in a
story are provided on only one side and the opposite wall of such story, the story
shall be equipped throughout with an automatic sprinkler system.
903.2.10.1.3 Basements. Delete and revise as follows, All basements shall be equipped
throughout with and approved automatic sprinkler system.
903.3.1.1 NFPA 13 systems. Add to end of first sentence before the period, “with a
minimum 10% or 5 psi safety factor in the fire protection system hydraulic
calculations. The system demand should be 5 psi below the seasonal low water
903.3.1.1.1 Delete all exceptions.
903.3.5.1.1 Limited Area Sprinkler Systems; Delete subsection.
903.3.5.1.2 Residential Combination Services; Delete subsection.
903.5.1 Fire pump test header: Add new subsection, “Provide OS and Y control valve
on all pump test headers. The exterior fire pump header shall be provided with
an outlet for the fire pump connection.”
903.3.5.3 Safety factor: Add new subsection as follows, Hydraulically calculated sprinkler
systems shall maintain a minimum of 10% or five (5) pounds per square inch
cushion (whichever is greater) between the seasonal low water supply and the
total sprinkler demand. The total sprinkler demand shall include the sprinkler
demand and the hose stream demand.
903.3.5.4 Multi Tenant Occupancy: Delete and revise as follows, When an automatic fire
suppression system is installed in a multi tenant building, each tenant shall have
its own sprinkler supply line off the main or riser with its own water flow switch
and control valve. A strobe light shall be mounted on the exterior front of that
tenant space and as indicated in Section 903.4. The strobe light shall activate
upon water flow and/or fire alarm activation within the individual unit
903.3.7 Fire Department Connections, Delete and revise as follows, The fire
department connection shall be located on the front of the building or at a
location approved by the fire prevention code official. The fire department
connection shall consist of one four inch Stortz coupling on a 30 degree elbow
mounted between 36 inches and 48 inches above the finished floor.
903.4 Delete exception 2, 3, 4, 5 6 and 7.
903.4.2 Alarms. Add after second sentence, “An exterior audio/visual device shall be
located over the fire department connection in addition to the alarm bell.”
903.4.2.1 Audio/visual. Add new subsection. "Fire alarms shall be provided in such a
manner as to be seen and heard in all areas of every building. All sprinkled
buildings shall be provided with audio/visual devices
903.4.3 Floor control valves. Delete "in high rise buildings" and substitute "in all multi-
903.4.3 Add new subsection. “Buildings over two stories above grade shall be provided
with floor control valves with water flow switches for each floor.”
903.4.3.1 Control valves. Add new subsection. "Buildings over two stories above grade
shall be provided with floor control valves with flow switches for each floor.
Individual control valves shall be provided in water flow switches for each floor.
903.7 Check valves. Add new subsection. A check valve shall be installed in each
903.8 Quick response sprinklers. Add new subsection. All new construction offices,
assembly, and residential buildings shall be provided with residential and/or
quick response sprinklers.
903.9 High-rack storage. Add new subsection. All warehouse storage areas where the
storage height exceeds 12 feet shall be provided with inside 2½-inch fire hose
valves with 1½" reducer to a 1½" connection. The valves shall be located at each
entrance to the warehouse and/or storage area. In no case shall the valves be
more than 120 feet travel distance or 240 feet apart.
903.10 Hose valves. Add new subsection as follows. The fire hose valves system piping
1. Separate riser-piping system.
2. Hydraulically calculated for a minimum of 250 GPM. at
75 PSI. to the most hydraulically remote fire hose valve.
3. Where the system pressures exceed 100 PSI, provide a
potter reduced pressure field adjustable type valve.
904.3.5 Monitoring: Delete section and substitute; All automatic fire extinguishing
systems shall be monitored by a fire alarm system directly connected to the
communications center of the Northbrook Fire Department or a UL Approved
Central Station in a method approved by the Code Official in accordance with
905.3.1 Building Height; Delete first sentence and substitute "class III standpipe systems
shall be installed throughout buildings where the floor level is greater than two
stories in height or more than one story below grade."
905.3.1.1 Building Area; Add a new subsection as follows, Class I standpipe systems shall
be installed in all buildings where any portion of the building's interior area is
more than 150 feet of travel, vertically, and horizontally, from the main entrance
of the building of fire department vehicle access. Where the most remote portion
of a floor or story is more than 150 feet from a hose connection, the Fire
Prevention Code official may require additional hose connections be provided in
905.5 Location of class II standpipe hose connections. Delete subsection in its
entirety and substitute "class II systems are not permitted. Any requirement for
standpipes shall be achieved by class I or III systems".
906.1 Where required add new section 7. “The occupant/tenant space shall not be
required to maintain a fire extinguisher if the space had direct access to common
areas, such as corridors, stairwells and lobbies, where portable fire extinguishers
are required by code."
906.4.1 Cooking grease fires: Add new subsection; In areas with a wet chemical fire
suppression system there shall be a minimum of one 6 (six) liter wet chemical
potassium based fire extinguisher within the kitchen area in addition to other
906.5.1 Conspicuous location: Add new subsection; Fire extinguishers shall be located
within 5 feet of each exit door. All other areas shall have fire extinguishers
installed in accordance with NFPA 10.
907.1.2.1 Addressable Systems; Add new subsection; All fire alarm systems shall be of
point addressable type.
907.1.3 Fire alarms license; Add new subsection; In order to install a fire alarm system
in The Village of Northbrook the installer must be a Licensed Fire Alarm
Installer or a licensed electrician. Prior to acceptance testing the alarm
contractor shall provide a current copy of the alarm contractor’s certificate of
compliance and a copy of the protected property’s remote station UL certificate
to the Village of Northbrook Fire Prevention Bureau.
907.1.4 Where required - retroactive in existing buildings and structures; Delete the
first sentence and replace with; An approved manual, automatic or manual and
automatic fire alarm system shall be installed in all existing multi-tenant
commercial buildings and structures with a total square foot greater than 2500 sq.
ft. All commercial buildings not equipped with an approved fire alarm system
shall have a five-year installation grace period during in which to comply.
907.2 Where required-new buildings and structures. Delete and revise as follows;
An approved manual, automatic or manual and automatic fire alarm system
installed in accordance with the provisions of this code and NFPA 72 shall be
provided in new buildings and structures in accordance with Section 907.2.1
through 907.2.23 and provide occupant notification in accordance with section
907.10, unless other requirements are provided by another section of this code.
Where automatic sprinkler protection installed in accordance with Section
903.3.1.1 or 903.3.1.2 is provided and connected to the building fire alarm
system, automatic heat detection required by this section shall not be required.
907.2 Where required - new buildings and structures: Delete all exceptions from
907.2.1 through 907.2.10.1.2
907.4.6 Alarm Zones; Add new subsection; Manual pull, Audio/Visual and detectors
shall be on separate zones per floor.
907.12 Delete all exceptions
907.14.1 Hood and Duct Systems; Add new sub section; Kitchen and hood suppression
systems shall be connected to the building fire alarm systems.
907.21 Radio Transmission: Add a new subsection. “All fire protective signaling
systems required by this Code or voluntarily installed by the owner of the
building or structure shall be equipped with a wireless system operating on radio
transmissions and shall be fully compatible with the receiving equipment at the
owner’s selected private central station or the fire department’s emergency signal
receiving equipment at its central answering point, as applicable. Any such
system shall comply with the requirements of this Section 917.0 and such other
technical standards as are necessary and required by the code official. The
requirements of this section shall apply only to new fire protective signaling
systems for which a building permit is issued after August 25, 2001, unless
otherwise provided by this Code.”
909.20.6 Fan shut down, Add new subsection as follows; In a garage setting in which a
carbon monoxide detection controls the activation of an exhaust system the
exhaust system must shut down upon the activation the fire detection and/or
suppression systems. There shall be a manual override control device installed at
the direction of the Fire Prevention Code Official.
912.2 Location, Delete and revise as follows; With respect to hydrants, driveways,
buildings and landscaping, fire department connections shall be so located that
fire apparatus and hose connected to supply the system will not obstruct access to
the buildings for other fire apparatus. Fire department connections shall be
located within 100 feet of a fire hydrant at a location approved by the code
912.4 Signs. Add to subsection, “Signage of a durable material with lettering no less
than 1” in height shall be provided at the fire department connection indicating
the address range that specific fire department connection serves.”
913.4 Valve supervision; Delete exceptions 3 and 4.
913.6 Sprinkler-Fire pump room; Add new subsection. "Provide a minimum 2 hour
rated enclosure with an automatic fire suppression system with both an outside
door at grade and an interior door access". When below grade, the room shall be
accessed by a two-hour rated corridor immediate adjacent to a rated stairwell
914.2.1 Delete exception in entirety
914.3.1 Delete exception
914.7.1 Delete exception
1003.3.1.8.4 Stairwell Doors; Delete exceptions 2 and 3.
1007.1 Delete exception 1
1008.1.8.3 Locks and latches; Add exception #5.
5. Doors allowed to have an electric strike locking system shall incorporate
a fail safe lock system. This system is to include, but not limited to:
5.1 Connection to the building’s fire alarm which will disconnect the
lock system upon any alarm.
5.2 Electrical power failure to the lock system.
5.3 Emergency “panic” button release within three (3) feet of the
door. Activation of the button would release the lock system
within 15 seconds or as required by the Fire Code Official
Signage stating operation of the emergency button would be
required adjacent to the button location.
1013.1 Delete exception 6
1027.5 Delete exception 1, 4 and 6
2404.14.1 Occupant Load Sign; Add new subsection as follows, A Village of Northbrook
Fire Department Sign with maximum occupant load must be prominently posted
at the main entrance at all times.
3301.1 Scope; Add new exception, #10. Any quantity of explosives in excess of fifty
(50) pounds, exclusive of blasting caps.”
3301.1.3 Delete exception #2
3308.1.1 General Requirements for all pyrotechnic/Consumer fireworks displays. Add
new subsection as follows; All pyrotechnic fireworks displays shall conform to
the Fireworks Use Act (425 ILCS 35).
3308.8.1 Fire department supervision of displays, Add new subsection as follows; All
outside public fireworks displays are required to have a fire department standby,
to be determined by the fire chief or his/her designee. Fire department expenses
incurred by this standby will be billed to the host of the display. Local
governmental agencies may be exempt from this fee.
3308.11 Retail display and sales, Delete and revise as follows; it shall be unlawful to
sell, store, or advertise for sale, Division 1.4G, 1.3G & 1.4S fireworks within the
boundaries of the Village of Northbrook.
3404.2 Tank storage; Delete first sentence and insert: “Storage of above ground fuel
tanks are prohibited”
3404.2.12.3 Existing tanks; Add a new section; Maintenance testing of existing underground
storage tank systems. Insert new sub section: "Every underground storage tank
of two hundred (200) gallon capacity or greater which contains flammable or
combustible liquids of Class I, II or III and the piping therefor to its dispensing
units shall be tested for leakage from its date of installation in accordance with
the following schedule: every five (5) years for the first ten (10) years; every
three (3) years for the next nine (9) years; and every two (2) years thereafter.
However, when a condition exists that a leakage is probably, the code official
may require, in accordance with the authority granted by this code, testing to
determine if any leakage has occurred. The testing of the underground storage
tanks and piping to the dispensing units shall be conducted in a manner
prescribed by the code official. All costs incurred for such testing shall become
the responsibility of the owner or operator of the underground storage tank
3606.3.1 Indoor Storage. Delete subsection and substitute, Indoor storage of magnesium
shall be in accordance with the following:
1. Storage of raw material shall be limited to no more than 30,000
pounds of magnesium per fire containment area;
2. Storage of finished goods shall be limited to no more than
20,000 pounds of magnesium per fire containment area;
3. Storage of scrap magnesium shall be limited to no more than
20,000 pounds of magnesium per fire containment area;
4. All magnesium raw material storage, scrap storage and
processing must be contained within a fire containment area with
a fire resistance rating of not less than four (4) hours;
5. All magnesium storage and processing shall be in building of
resistive or non-combustible construction; and
6. Storage of raw material, finished goods and scrap shall be in
separate and distinct fire containment areas.
3606.4.4 Mixed storage; Add a new subsection: Raw material storage areas shall contain
only unprocessed (raw) materials stored on pallets. Scrap material storage areas
shall contain clean scrap magnesium only, which shall be held in approved
3607 Fire safety Requirements: Add new section number
3607.1 General: Add new subsection: The provisions of NFPA 480 shall apply where
provisions of this article do not specifically cover conditions and operations.
3607.2 Fire extinguishing powder: Add a new subsection: A supply of approved
extinguishing powder in a substantial container with a hand scoop or shovel for
applying powder on magnesium fires or an approved extinguisher unit designed
for use with such powder shall be kept within easy reach of every operator
performing a machining, grinding or other processing operation on magnesium.
3607.3 Fire suppression and detection systems: Add a new subsection: Buildings in
which magnesium die casting occurs shall be protected by an automatic sprinkler
system in accordance with the requirements of NFPA 13 listed in Appendix A
where provisions of this article do not specifically cover conditions and
operations. An automatic sprinkler system shall not be installed in the die casting
room, the raw material storage room, or the scrap storage room where such areas
are used for the storage or processing of magnesium.
3607.4. Building construction requirements: Add a new subsection: All areas
containing magnesium shall be equipped with automatic actuating roof vents
equal to not less than five (5) percent of the ceiling area of the fire containment
3607.5 Emergency disconnects; Add a new subsection: Emergency electrical
disconnects for all electrical equipment, apparatus and fixtures shall be provided
at the principle exit from the die casting room.
3607.6 Signage: Add a new subsection; All entrances to any area containing magnesium
must be provided with a signage to alert plant and emergency service personnel
to the presence of magnesium in the area. Such signage shall consist of
contracting letter not less than three (3) feet in height, with a stroke width not less
than ¾ inch, containing essentially the following message: Danger! Magnesium
is stored or processed in this area. In the event of a fire "DO NOT USE
3805.3 Underground: Add a new subsection: storage of liquefied petroleum gas and
underground tanks is prohibited.
3805.4 Location: Add a new subsection: "Installation for the bulk storage of liquefied
petroleum gas having an aggregate water capacity in excess of 2,000 gallons are