Current through Register 1531, September 27, 2024
Occupancies in Group H-2 shall be constructed in accordance
with Sections 415.6.1 through 415.6.4 and the International Fire
Code. [F]
415.6.1
Combustible dusts, grain processing and storage. The provisions of
Sections 415.6.1.1 through 415.6.1.6 shall apply to buildings in which
materials that produce combustible dusts are stored or handled. Buildings that
store or handle combustible dusts shall comply with the applicable provisions
of NFPA 61, NFPA 85, NFPA 120, NFPA 484, NFPA 654, NFPA 655 and NFPA 664, and
the International Fire Code. [F]
415.6.1.1
Type of construction and
height exceptions. Buildings shall be constructed in compliance with the
height and area limitations of Table 503 for Group H-2; except that where
erected of Type I or II construction, the heights and areas of grain elevators
and similar structures shall be unlimited, and where of Type IV construction,
the maximum height shall be 65 feet (19 812 mm) and except further that, in
isolated areas, the maximum height of Type IV structures shall be increased to
85 feet (25 908 mm). [F]
415.6.1.2
Grinding rooms. Every room or space occupied for grinding or
other operations that produce combustible dusts shall be enclosed with
fire barriers constructed in accordance with Section 707 or
horizontal assemblies constructed in accordance with Section
712, or both. The minimum fire-resistance rating shall be 2
hours where the area is not more than 3,000 square feet (279
m2), and 4 hours where the area is greater than
3,000 square feet (279 m2). [F]
415.6.1.3
Conveyors. Conveyors,
chutes, piping and similar equipment passing through the enclosures of rooms or
spaces shall be constructed dirt tight and vapor tight, and be of
approved noncombustible materials complying with Chapter 30.
[F]
415.6.1.4
Explosion
control. Explosion control shall be provided as specified in the
International Fire Code, or spaces shall be equipped with the
equivalent mechanical ventilation complying with the International
Mechanical Code. [F]
415.6.1.5
Grain elevators. Grain
elevators, malt houses and buildings for similar occupancies shall not be
located within 30 feet (9144 mm) of interior lot lines or
structures on the same lot, except where erected along a railroad right-of-way.
[F]
415.6.1.6
Coal
pockets. Coal pockets located less than 30 feet (9144 mm) from interior
lot lines or from structures on the same lot shall be
constructed of not less than Type IB construction. Where more than 30 feet
(9144 mm) from interior lot lines, or where erected along a
railroad right-of-way, the minimum type of construction of such structures not
more than 65 feet (19 812 mm) in building height shall be Type
IV. [F]
415.6.2
Flammable and combustible liquids. The storage, handling,
processing and transporting of flammable and combustible liquids in Groups H-2
and H-3 occupancies shall be in accordance with Sections 415.6.2.1 through
415.6.2.10, the International Mechanical Code and the
International Fire Code. [F]
415.6.2.1
Mixed occupancies.
Where the storage tank area is located in a building of two or more occupancies
and the quantity of liquid exceeds the maximum allowable quantity for one
control area, the use shall be completely separated from
adjacent occupancies in accordance with the requirements of Section 508.4. [F]
415.6.2.1.1
Height exception.
Where storage tanks are located within a building no more than one
story
above
grade plane, the
height limitation of Section 503 shall not apply for Group H. [F]
415.6.2.2
Tank
protection. Storage tanks shall be noncombustible and protected from
physical damage. Fire barriers or horizontal
assemblies or both around the storage tank(s) shall be permitted as
the method of protection from physical damage. [F]
415.6.2.3
Tanks. Storage tanks
shall be approved tanks conforming to the requirements of the
International Fire Code. [F]
415.6.2.4
Suppression. Group H
shall be equipped throughout with an approved
automatic sprinkler system, installed in accordance with
Section 903. [F]
415.6.2.5
Leakage containment. A liquid-tight containment area compatible with the
stored liquid shall be provided. The method of spill control, drainage control
and secondary containment shall be in accordance with the
International
Fire Code. [F]
Exception: Rooms where only double-wall storage
tanks conforming to Section 415.6.2.3 are used to store Class I, II and IIIA
flammable and combustible liquids shall not be required to have a leakage
containment area.
415.6.2.6
Leakage alarm. An approved automatic alarm shall
be provided to indicate a leak in a storage tank and room. The alarm shall
sound an audible signal, 15 dBa above the ambient sound level, at every point
of entry into the room in which the leaking storage tank is located. An
approved sign shall be posted on every entry door to the tank
storage room indicating the potential hazard of the interior room environment,
or the sign shall state: WARNING, WHEN ALARM SOUNDS, THE ENVIRONMENT WITHIN THE
ROOM MAY BE HAZARDOUS. The leakage alarm shall also be supervised in accordance
with Chapter 9 to transmit a trouble signal. [F]
415.6.2.7
Tank vent. Storage
tank vents for Class I, II or IIIA liquids shall terminate to the outdoor air
in accordance with the International Fire Code. [F]
415.6.2.8
Room ventilation.
Storage tank areas storing Class I, II or IIIA liquids shall be provided with
mechanical ventilation. The mechanical ventilation system shall be in
accordance with the International Mechanical Code and the
International Fire Code. [F]
415.6.2.9
Explosion venting.
Where Class I liquids are being stored, explosion venting shall be provided in
accordance with the International Fire Code. [F]
415.6.2.10
Tank openings other than
vents. Tank openings other than vents from tanks inside buildings shall
be designed to ensure that liquids or vapor concentrations are not released
inside the building. [F]
415.6.3
Liquefied petroleum gas
facilities. The construction and installation of liquefied petroleum gas
facilities shall be in accordance with the requirements of this code, the
International Fire Code, the International Mechanical
Code, the International Fuel Gas Code and NFPA 58.
[F]
415.6.4
Dry cleaning
plants. The construction and installation of dry cleaning plants shall
be in accordance with the requirements of this code, the International
Mechanical Code, the International Plumbing Code and
NFPA 32. Dry cleaning solvents and systems shall be classified in accordance
with the International Fire Code. [F]
