415.3.2 Detached Buildings for Group H-1 and H-2 or H-3

The storage of hazardous materials in excess of those amounts listed in Table 415.3.2 shall be in accordance with the applicable provisions of Sections 415.4 and 415.5. Where a detached building is required by Table 415.3.2, there are no requirements for wall and opening protection based on fire separation distance.

TABLE 415.3.2 REQUIRED DETACHED STORAGE

DETACHED STORAGE IS REQUIRED WHEN THE QUANTITY OF MATERIAL EXCEEDS THAT LISTED HEREIN
Material	Class	Solids and Liquids (tons)a,b	Gases (cubic feet)a,b
Explosives	Division 1.1	Maximum Allowable Quantity	Not Applicable
	Division 1.2	Maximum Allowable Quantity
	Division 1.3	Maximum Allowable Quantity
	Division 1.4	Maximum Allowable Quantity
	Division 1.4c	1
	Division 1.5	Maximum Allowable Quantity
	Division 1.6	Maximum Allowable Quantity
Oxidizers	Class 4	Maximum Allowable Quantity	Maximum Allowable Quantity
Unstable (reactives) detonable	Class 3 or 4	Maximum Allowable Quantity	Maximum Allowable Quantity
Water-reactives detonable	Class 2 or 3	Maximum Allowable Quantity	Not Applicable
Oxidizer, liquids and solids	Class 3	1,200	Not Applicable
	Class 2	2,000	Not Applicable
Organic peroxides	Unclassified Detonable	Maximum Allowable Quantity	Not Applicable
	Class I	Maximum Allowable Quantity	Not Applicable
	Class II	25	Not Applicable
	Class III	50	Not Applicable
Unstable (reactives) nondetonable	Class 3	1	2,000
	Class 2	25	10,000
Water reactives nondetonable	Class 3	1	Not Applicable
	Class 2	25	Not Applicable
Pyrophoric materials detonable	Not Applicable	Maximum Allowable Quantity	Maximum Allowable Quantity
Pyrphoric gases and nondetonables	Not Applicable	Not Applicable	2,000

For SI: 1 ton = 2,000 pounds = 906 kg, 1 cubic foot = 0.02832 m3, 1 pound = 0.454 kg.

a. For materials that are detonable, the distance to other buildings or lot lines shall be as specified in Table 415.3.1 based on trinitrotoluene (TNT) equivalence of the material. For materials classified as explosives, see the New York City Fire Code. Unclassified detonable organic peroxides, detonable pyrophoric materials, detonable unstable (reactive) materials and detonable water-reactive materials shall be considered as explosives for the purposes of storage.

b. "Maximum Allowable Quantity" means the maximum allowable quantity per control area set forth in Table 307.1(1).

c. Limited to Division 1.4 materials and articles, including articles packaged for shipment, that are not regulated as an explosive under Bureau of Alcohol, Tobacco and Firearms (BATF) regulations or unpackaged articles used in process operations that do not propagate a detonation or deflagration between articles, providing the net explosive weight of individual articles does not exceed 1 pound.