6404.2.1 Distance from storage to exposures.
FC § 6404.2.1
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 6404.2.1Pyrophoric 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 PropertyNonrated construction or openings within 25 feetTwo-hour construction and no openings within 25 feetFour-hour construction and no openings within 25 feet25052555002,50010501010507,500201002020100 For SI: 1 foot = 304.8 mm, 1 cubic foot = 0.02832 m3. 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.
