Try contacting your local Factory Mutual Office for clarification and advice.  T
hey virtually write the fire codes, so may be of help.  An engineer that we work
 with here is Trudy Zedaker Yarger, 313-540-0500.  She is very practical and
 ver
very helpful.  Give her a call and I am sure that she can help or refer you to t
he right place & person.
 
Geoffrey Brown
Kelsey Museum
University of Michigan
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