A Good Start
Pricing varies based on types of equipment to be braced and location.
A simple and fairly unobtrusive seismic brace is a good place to start. Later, as time and money permit, material restraints can be added to the shelves.
Solutions run the gamut from Industrial to Invisible
It is usually less expensive to brace during the construction process.
Exhaust Duct Bracing
The Federal Emergency Management Agency has a wealth of information on disaster planning, including Earthquake Preparation. Information is available on the Web at http://www.fema.gov, or by calling 1-800-480-2520.
The University of Washington’s Department of Environmental Health and Safety provides online information on earthquake preparedness and response, as well as safety classes on campus.