Libraries (or whatever we may call them) have had a great deal of experience with compact shelving. You might ask around amongst them. According to Kate Roberts: > > The Museum of New Zealand is in the process of specifying compacting > shelving designs for its new building. > We have got to a division of opinion on the various merits of a crank handle > vs a wheel for driving the shelving units. > If anyone has had experience with both and can give me technical > information on the comparative gearing possibilities for either system or > put me in touch with someone who can by Thursday morning I would be very > grateful. > Kate Roberts > Museum of New Zealand > [log in to unmask] >