Regulationhistorical
49 CFR 193.2117
Combustible materials.
Current as of 1999-10-01 Government source
Pipeline and Hazardous Materials Safety AdministrationOfficial agency material
View source Combustible materials are not permitted for the construction of buildings, plant equipment, and the foundations and supports of buildings and plant equipment in areas where ignition of the material would worsen an emergency. However, limited combustible materials may be used when the use of noncombustible materials is impractical.