SECTION 414 HAZARDOUS MATERIALS
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[F] 414.2 Control areas.
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[Delete Section 414.2.5 and replace as follows:]
B-414.2.5 Hazardous materials in Group M display and storage areas and in Group Storage areas. Hazardous materials located in Group M and Group S occupancies shall be in accordance with Sections 414.2.5.1 through 414.2.5.4.
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[Add Table 414.2.5(3) as follows:]
B-Table 414.2.5(3) Maximum Allowable Quantity of Low Burning Velocity Category 1B Flammable Gas in Group M and S Occupancies per Control Area a
Category 1B (Low BV) d | Maximum Allowable Quantity Per Control Area
Sprinklered b | Nonsprinklered
Gaseous | 390,000 cu ft | 195,000 cu ft
Liquified | 40,000 lb c | 20,000 lb
For SI: 1 pound = 0.454 kg, 1 square foot = 0.0929 m2, 1 cubic foot = 0.028 m3, 1 inch/second = 2.54 cm/s
a. Control areas shall be separated from each other by not less than a1-hour fire barrier.
b. The building shall be equipped throughout with an approved automatic sprinkler system with minimum sprinkler design density of Ordinary Hazard Group 2 in the area where flammable gases are stored or displayed.
c. Where storage areas exceed 50,000 square feet in area, the maximum allowable quantities are allowed to be increased by 2 percent for each 1,000 square feet of area in excess of 50,000 square feet, up to not more than 100 percent of the table amounts. Separation of control areas is not required. The aggregate amount shall not exceed 80,000 pounds.
d. “Low BV” Category 1B flammable gas has a burning velocity of 3.9 in/s (10 cm/s) or less.
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[Add Section 414.2.5.4 as follows:]
B-414.2.5.4 Flammable gas. The aggregate quantity of Category 1B flammable gas having a burning velocity 3.9 in/s (10 cm/s) or less stored and displayed within a single control area of a Group M occupancy or stored in a single control area of a Group S occupancy is allowed to exceed the maximum allowable quantities per control area specified in Table 307.1(1) without classifying the building or use as a Group H occupancy, provided the materials are stored and displayed in accordance with the International Fire Code and quantities do not exceed the amounts specified in Table 414.2.5(3).
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[F] 414.5 Inside Storage, dispensing and use.
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[F] 414.5.1 Explosion Control.
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[Revise Table B-414.5.1, Explosion Control Requirements, to make an addition to the row “Flammable Gas” to add a note “j” as follows:]
Material | Category | Explosion Control Methods
Barricade construction | Explosion (deflagration) venting or explosion (deflagration) prevention systems b
Hazard Category |
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Flammable gas | Gaseous | Not required | Required j
Liquified | Not required | Required j
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j. Not required for Category 1B Flammable Gases having a burning velocity not exceeding 3.9 in/s (10 cm/s).
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