Vibration

There are many queries in the distlist archives concerning the
measurement of vibration in exhibitions, but very little information
on how to mitigate vibration.  I'm looking for help to reduce
vibration in several fragile architectural models that we are
currently exhibiting. The models consist of heavy blocks (plexi and
gypsum cement) on very intricate frameworks made of brass rods.  The
models measure about 2 feet X 2 feet.  There are no plexi
covers--this at the architect's request.

The exhibition bases are in effect light boxes--fairly tall hollow
MDF boxes with plexiglas display surfaces and lights inside so that
the models are illuminated from below.  The bottoms of the
exhibition bases are weighted with sandbags.  The gallery floors are
hardwood with some kind of padding beneath it that is supposed to
minimize vibration but these models are showing us that the floor
actually vibrates a lot.  In fact there is a "sweet spot" on the
floor near one model and when you step on it the whole model
quivers.  We have already seen one joint pop as a result.

What can we do?  On the Internet I have found rubber
vibration-absorbing pads meant to go under household washing
machines.  Would a pad like this place under the light-box base
help?  Has anyone ever tried this? Other ideas?

Karen Potje
Chef, Service de la conservation/restauration
Centre Canadien d'Architecture
Montreal, Quebec


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                  Conservation DistList Instance 23:40
                  Distributed: Friday, April 16, 2010
                       Message Id: cdl-23-40-026
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