ad--2010-00079_0001.jpg SPECIAL DETAILED REQUIREMENTS BASED ON USE AND OCCUPANCY
3. Partial or complete closing of required openings in 2. Operations located under canopies shall be limited
exterior walls by tarpaulins or any other means. to refueling only.
4. Dispensing of fuel. 3. The canopy shall be constructed in a manner that
406.4 Enclosed parking garages. prevents the accumulation of hydrogen gas.
406.4.1 Heights and areas. Enclosed vehicle parking 406.6 Repair garages.
garages and portions thereof that do not meet the definition 406.6.1 General. Repair garages shall be constructed in
of open parking garages shall be limited to the allowable accordance with the International Fire Code and this sec-
' heights and areas specified in Table 503 as modified by Sec- tion: This occupancy shall not include motor fuel- dispens-
tions 504, 506 and 507. Roof parking is permitted. ing facilities, as regulated in Section 406.5.
406.4.2 Ventilation. A mechanical ventilation system shall 406.6.2 Mixed uses. Mixed uses shall be allowed in the
be provided in accordance with the International Mechani-
cal Code. same building as a repair garage subject to the provisions of
Section 508.3.
406.5 Motor fuel - dispensing facilities.
v 406.6.3 Ventilation. Repair garages shall be mechanically
406.5.1 Construction. Motor fuel- dispensing facilities ventilated in accordance with the International Mechanical
shall be constructed in accordance with the International Code. The ventilation system shall be controlled at the
Fire Code and this section. entrance to the garage.
406.5 .2 Canopies. Canopies under which (fuels are dis , 406.6.4 Floor surface. Repair garage floors shall be of con-
_ qpS hall have a clear, unobstructed heig 6-f nofless Crete or similar noncombustible and nonabsorbent materi-
than 13 fe et 6 inches (4115 mm) to the lowest projecting ele- als.
ment in the vehicle drive- through area. Canopies and their
supports over pumps shall be of noncombustible materials, Exception: Slip-resistant, nonabsorbent, interior floor
fire - retardant- treated wood complying with Chapter 23, finishes having a critical radiant flux not more than 0.45
wood of Type IV sizes or of construction providing 1 -hour W /cm as determined by NFPA 253, shall be permitted.
fire resistance. Combustible materials used in or on a can- 406.6.5 Heating equipment. Heating equipment shall be
opy shall comply with one of the following: installed in accordance with the International Mechanical •
1. Shielded from the pumps by a noncombustible ele- Code.
ment of the canopy, or wood of Type IV sizes;
[F] 406.6.6 Gas detection system. Repair garages used for
2. Plastics covered by aluminum facing having a mini- repair of vehicles fueled by nonodorized gases, such as
mum thickness of 0.010 inch (0.30 mm) or corro- hydrogen and nonodorized LNG, shall be provided with an
sion- resistant steel having a minimum base metal approved flammable gas- detection system.
thickness of 0.016 inch (0.41 mm). The plastic shall
have a flame spread index of 25 or less and a [F] 406.6.6.1 System design. The flammable gas- detec-
smoke- developed index of 450 or less when tested in tion system shall be calibrated to the types of fuels or
the form intended for use in accordance with ASTM E gases used by vehicles to be repaired. The gas detection
84 and a self - ignition temperature of 650 °F (343 °C) system shall be designed to activate when the level of
or greater when tested in accordance with ASTM D flammable gas exceeds 25 percent of the lower explosive
1929; or limit. Gas detection shall also be provided in lubrication
,
3. Panels constructed of light- transmitting plastic mate- or chassis repair pits of garages used 'for repairing
rials shall be permitted to be installed in canopies nonodorized LNG - fueled vehicles.
erected over motor vehicle fuel - dispensing station [F] 406.6.6.2 Operation. Activation of the gas detection
fuel dispensers, provided the panels are located at system shall result in all of the following:
least 10 feet (3048 mm) from any building on the
samu l._t and face yards or streets not °cs than ' -? feet 1. Initiat.'•on of distinct audible and visual alarm sig
(12 19' mm) in width can tr c: -;-I sides. The aggie- n ^Is in tit.' repair g rage.
gate area: of plastics shall not exceed 1,000 square �. 'Jeactivatton of all hea iqg systems located in the
(33 m The maximum area of any individ =.ia repair garasz.
a!,el shall 1iot exceed 100 -.quare feet (9.3 mz).
3. Activation of the mechanical ventilation system,
fi
406.5.2- Canopies used to support gaseous hydrogen ;v sere the system i s interlocked vvi�b gas detection.
syst *1i.:S. Canopies that are used to sheltei :iispetiaing
c l eratioins where flammable compressed oases are [F] 406.6.6.3 Faiture of die gas detection systen.. Fail -
ure of the gas detection system shall result in the deacti-
iocated on the roof of the canopy shall be in accordance
with the following °F :y rc�ay vation of the heating system, activation of the •
mechanical ventilation system when the system is inter -
1. The canopy shall meet or exceed Type I construc locked with the gas detection system'and cause a trouble
lion requirements. signal to sound in an approved location.
�E 2006 I"- TERNA ION AL BL!ILD, ;013&