You don't want to go there---it's like saying that Titanic was
"unsinkable". Structures are designed to safely survive a certain design
lateral and vertical acceleration. Up until the Northridge quake, most
equipment rooms for TV were designed for 1.0 G lateral and 0.5 G
vertical. Some seismic records in the 1994 Northridge quake pointed to
vertical accelerations approaching 1.0 G. I don't know what current
design accelerations are. I have heard that the Chile quake of a year or
so ago has caused some rethinking of code requirements, and I don;t know
what the accelerations were for the 1964 Alaska quake, but the tsunami
that caused was a different challenge in coastal areas as was the Indian
Ocean tsunami. Nothing is "proof"!
On 2011-02-23 11:05 PM, Steven C. Barr wrote:
> are quake-proof
Richard L. Hess email: [log in to unmask]
Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX
Quality tape transfers -- even from hard-to-play tapes.