In a message dated 01/30/2001 3:34:53 PM Eastern Standard Time,
[log in to unmask] writes:

<< Can you help me find information on the construction of an environmentally
 controlled room within another structure. The room would be used to store
 collection objects such as photographic glass plate negatives. Fire
 resistance is another requirement.  >>

Henry Wilhelm's 1993 "Permanence and Care of Color Photographs" is still the
standard work on photo storage.   The book contains many examples of
in-building vaults, although it focuses on operation, rather than design and
construction.  Myself, I just bought a $2300 freezer for my 45,000 4"x5" film
negatives from 1936-1972.  Good for ice cream, too.

Best,  Christopher