In article , "Ulysses" In California, the Totalitarianism State wrote:

Actually, I would bet that many states have fire code laws that
prohibit the storage of propane tanks inside a home garage. They are
probably not widely followed or enforced though.

I think not for small quantities.

Many/most jurisdictions appear to use NFPA 58.

http://www.nfpa.org/faq.asp?categoryID=924#22963

Q: What restrictions apply to the stoarge of propane cylinders in buildings?


A: The storage of propane in buildings is limited:

Buildings frequented by the public are limited to cylinders with a
propane capacity of 1 pound. The total quantity stored is limited
to 200 pounds of propane.

Buildings not frequented by the public are limited to a maximum quantity
of 300 pounds of propane. The cylinder size is not restricted.

Thus the storage of a few 20/40 pound cylinders in a private
residence seems essentially unregulated.

Of course, appartments and condos frequently have additional
restrictions imposed by the governing authority and for very
good reasons. Propane cylinders on the fifth floor balcony
of a complex is probably asking for trouble.





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