N.Y.C. Admin. Code § FC 6404: Section FC 6404: Storage

6404.1 Indoor storage.

Indoor storage of pyrophoric materials in amounts exceeding the maximum allowable quantity per control area indicated in FC Table 5003.1.1(1), shall be in accordance with FC 5001, 5003, 5004 and this chapter. The storage of silane gas and gas mixtures with a silane gas concentration of 1.37 percent or more by volume, shall be in accordance with CGA G-13.

6404.1.1 Liquid-tight floor.

In addition to the requirements of FC 5004.12, floors of storage areas containing pyrophoric liquids shall be of liquid-tight construction.

6404.1.2 Pyrophoric solids and liquids.

Storage of pyrophoric solids and liquids shall be limited to a maximum area of 100 square feet (9.3 m

2

) per pile. Storage shall not exceed 5 feet (1524 mm) in height. Individual containers shall not be stacked. Aisles between storage piles shall be a minimum of 10 feet (3048 mm) in width. Individual tanks or containers shall not exceed 500 gallons (1893 L) in capacity.

6404.1.3 Pyrophoric gases.

Storage of pyrophoric gases shall be in detached buildings where required by FC 5003.8.2.

6404.1.4 Separation from incompatible materials.

In addition to the requirements of FC 5003.9.8, indoor storage of pyrophoric materials shall be isolated from incompatible hazardous materials by 1-hour fire barriers with openings protected in accordance with the construction codes, including the Building Code.

Exception: Storage in approved hazardous materials storage cabinets constructed in accordance with FC 5003.8.7.

6404.2 Outdoor storage.

Outdoor storage of pyrophoric materials in amounts exceeding the maximum allowable quantity per control area indicated in FC Table 5003.1.1(3) shall be in accordance with FC 5001, 5003, 5004 and this chapter. The storage of silane gas, and gas mixtures with a silane gas concentration of 1.37 percent or more by volume, shall be in accordance with CGA G-13.

6404.2.1 Distance from storage to exposures.

The separation of pyrophoric solids, liquids and gases from buildings, lot lines, public streets, private roads or means of egress shall be in accordance with the following:

1. Solids and liquids. Two times the separation required by FC Chapter 57 for Class IB flammable liquids.

2. Gases. The location and maximum amount of pyrophoric gas per storage area shall be in accordance with FC Table 6404.2.1.

FC Table 6404.2.1 Pyrophoric Gases – Distance from Storage to Exposures

a

Maximum Amount per Storage Area (cubic feet)

Minimum Distance Between Storage Areas (feet)

Minimum Distance to Lot Lines (feet)

Minimum Distance to Public Streets and Private Roads (feet)

Minimum Distance to Buildings on the Same Property

Nonrated construction or openings within 25 feet

Two-hour construction and no openings within 25 feet

Four-hour construction and no openings within 25 feet

250

5

25

5

5

0

0

2,500

10

50

10

10

5

0

7,500

20

100

20

20

10

0

For SI: 1 foot = 304.8 mm, 1 cubic foot = 0.02832 m

3

.

a. The minimum required distances shall be reduced to 5 feet when protective structures having a minimum fire resistance of 2 hours interrupt the line of sight between the container and the exposure. The protective structure shall be at least 5 feet from the exposure. The configuration of the protective structure shall allow natural ventilation to prevent the accumulation of hazardous gas concentrations.

6404.2.2 Fire protection.

When overhead construction is provided for sheltering outdoor storage areas of pyrophoric materials, the storage areas shall be protected throughout by a fire extinguishing system.