Vibration

The city of Bergen, Norway is at the moment shook by heavily tunnel
work. The explosions have now reached an area close to Bergen
Museum. We fear the consequences for the collection, ranging from
small archaeological objects to paintings and polychrome wooden
sculpture. This November the museum will be opening a new exhibition
of medieval art. These objects are now temporarily stored in shelves
on Ethafoam to minimise vibration. Is it safe to mount them in the
exhibition, before the tunnel work is completed? As we understand
the short frequency of the waves leaves the building unaffected, but
can shake objects within it. We are therefore measuring the vertical
and horizontal movements on a simulated wooden object, placed in a
shelf in the storage area on the first floor.

Does anyone have experience with this type of problem? What are the
acceptable ranges for vibration? Do you have suggestions on other
types of measurements, not necessarily on an electronic basis?
Simple tests with clear and pedagogical output is welcome.

Kaja Kollandsrud
UiB, Bergen Museum
Konserveringsavdelingen
Arstadvn. 22
N-5009 Bergen
+47 55 58 61 76
Fax: +47 55 58 61 80

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                  Conservation DistList Instance 10:29
                Distributed: Friday, September 20, 1996
                       Message Id: cdl-10-29-007
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