Page 298 - 2018_IFC

FLAMMABLE FINISHES

quantity of solvent used in a machine shall not exceed 2404 when approved and where utilizing Class IIIA
the design capacity of the machine. or IIIB combustible liquids.
2403.3.5.2 Within spray booths and spray rooms. 2. In buildings other than Group A, E, I or R occupan-
Where solvents are used for cleaning spray nozzles and cies, approved limited spraying space in accordance
auxiliary equipment within spray booths and spray with Section 2404.9.
rooms, the ventilating equipment shall be operated 3. Resin application areas used for manufacturing of
during cleaning.
reinforced plastics complying with Section 2409
2403.3.6 Class II and III liquids. Solvents used outside shall not be required to be located in a spray room,
of spray booths, spray rooms or listed and approved spray spray booth or spraying space.
gun and equipment cleaning machines shall be restricted
to Class II and III liquids. 2404.3 Design and construction. Design and construction of
spray rooms, spray booths and spray spaces shall be in accor-
2403.4 Operations and maintenance. Flammable vapor dance with Sections 2404.3.1 through 2404.3.3.1.
areas, exhaust fan blades and exhaust ducts shall be kept free
from the accumulation of deposits of combustible residues. 2404.3.1 Spray rooms. Spray rooms shall be constructed
Where excessive residue accumulates in such areas, spraying and designed in accordance with Section 416 of the Inter-
operations shall be discontinued until conditions are cor- national Building Code and Section 2404.3.2 of this code,
rected. and shall comply with Sections 2404.4 through 2404.8 of
this code.
2403.4.1 Tools. Scrapers, spuds and other tools used for
cleaning purposes shall be constructed of nonsparking 2404.3.2 Floor. Combustible floor construction in spray
materials. rooms shall be covered by approved, noncombustible,
nonsparking material, except where combustible cover-
2403.4.2 Residue. Residues removed during cleaning and ings, including but not limited to thin paper or plastic and
debris contaminated with residue shall be immediately strippable coatings, are utilized over noncombustible
removed from the premises and properly disposed.
materials to facilitate cleaning operations in spray rooms.
2403.4.3 Waste cans. Approved metal waste cans
equipped with self-closing lids shall be provided wherever 2404.3.3 Spray booths. The design and construction of
spray booths shall be in accordance with Sections
rags or waste are impregnated with finishing material.
Such rags and waste shall be deposited therein immedi- 2404.3.3.1 through 2404.3.3.6, Sections 2404.4 through
2404.8 and NFPA 33.
ately after being utilized. The contents of waste cans shall
be properly disposed of not less than once daily and at the 2404.3.3.1 Construction. Spray booths shall be con-
end of each shift. structed of approved noncombustible materials. Alumi-
num shall not be used. Where walls or ceiling
2403.4.4 Solvent recycling. Solvent distillation equip-
ment used to recycle and clean dirty solvents shall comply assemblies are constructed of sheet metal, single-skin
with Section 5705.4. assemblies shall be not thinner than 0.0478 inch (18
gage) (1.2 mm) and each sheet of double-skin assem-
blies shall be not thinner than 0.0359 inch (20 gage)
SECTION 2404 (0.9 mm). Structural sections of spray booths are
SPRAY FINISHING allowed to be sealed with latex-based or similar caulks
and sealants.
2404.1 General. The application of flammable or combusti-
ble liquids by means of spray apparatus in continuous or 2404.3.3.2 Surfaces. The interior surfaces of spray
intermittent processes shall be in accordance with the require- booths shall be smooth; shall be constructed so as to
ments of Sections 2403 and 2404.2 through 2404.9.4. permit the free passage of exhaust air from all parts of
the interior, and to facilitate washing and cleaning; and
2404.2 Location of spray-finishing operations. Spray-fin- shall be designed to confine residues within the booth.
ishing operations conducted in buildings used for Group A, Aluminum shall not be used.
E, I or R occupancies shall be located in a spray room pro-
tected with an approved automatic sprinkler system installed 2404.3.3.3 Floor. Combustible floor construction in
in accordance with Section 903.3.1.1 and separated vertically spray booths shall be covered by approved, noncom-
and horizontally from the remainder of the building by fire bustible, nonsparking material, except where combusti-
barrier walls and horizontal assemblies with not less than a ble coverings, including but not limited to thin paper or
1-hour fire-resistance rating in accordance with the Interna- plastic and strippable coatings, are utilized over non-
tional Building Code. In other occupancies, spray-finishing combustible materials to facilitate cleaning operations
operations shall be conducted in a spray room, spray booth or in spray booths.
limited spraying space approved for such use. 2404.3.3.4 Means of egress. Means of egress shall be
Exceptions: provided in accordance with Chapter 10.
1. Automobile undercoating spray operations and Exception: Means of egress doors from premanu-
spray-on automotive lining operations conducted in factured spray booths shall be not less than 30
areas with approved natural or mechanical ventila- inches (762 mm) in width by 80 inches (2032 mm)
tion shall be exempt from the provisions of Section in height.

2018 INTERNATIONAL FIRE CODE ® 265
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