Shelving and earthquakes

Could anyone recommend a method with which to prevent rare books
from falling off of shelving in earthquake prone areas? The stacks
are made up of shelves that are 2 metres high, 1 metre wide, and
30cm in depth. I have seen and heard of netting and Polypropylene
woven straps  used for this purpose, but have no experience in the
area, and so would like to hear about various solutions and how
conservators and curators find the securing methods.

Vasare Rastonis
Book Conservator
National Library of New Zealand
Wellington 6001
New Zealand
+64 4 474 3169


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                  Conservation DistList Instance 17:2
                  Distributed: Thursday, June 19, 2003
                        Message Id: cdl-17-2-028
                                  ***