|Results of Shake Test -
Prepared by ANCO Engineers
Seismic Testing of QuakeGuardian
View video showing Seismic Testing of
Seismic Testing Systems
ANCO Engineers, founded in 1971, has performed seismic shake table
testing on over 500 components used in power plants, telecommunication
facilities, industrial facilities, and consumer products. ANCO also
constructs and installs shake tables and other seismic test systems.
Additional information on ANCO can be found at
The results of testing Quake Guardian clearly showed that the Quake
Guardian was able to protect the wine bottles from falling out at much
larger earthquakes than the conventional wine rack. The Quake Guardian
protected the bottles from several earthquakes of increasing size. It
was clear that the conventional wine rack could spill out bottles
during moderate earthquake events.
ANCO’s observations also suggest the following:
- When mounting any wine rack to a wall make sure to use strong
anchors or lag screws into the wood studs. The use of small plastic
anchors or Molly type bolts into drywall only may not provide
sufficient strength to keep the wine rack on the wall during a
strong earthquake. Keeping the wine bottles in the rack is a very
important requirement. But one must also keep the wine rack on the
- ANCO also recommends that a sheet of drywall, plywood, or
similar “soft” material be placed between the wine rack and the
wall, if the wall is brick, concrete, or masonry. Earthquake induced
motion of the wine bottles in the rack, even if they do not fall
out, cause the bottles to knock against the back wall and could
cause bottle breakage.
- ANCO also recommends that after an earthquake that both the wine
rack anchorage and the “hoop and coils” of the Quake Guardian be
inspected for possible loosening or damage, and replaced as needed.
After a large earthquake it may be prudent to automatically replace
all the hoops and coils.
Is a powerful quake
likely to strike in the next 30 years?
From the USGS
A Wake-Up Call for the California Wine Industry
By Mick Winter
On September 3, 2000 a real earthquake demonstration
was held in the Napa Valley, but no stacks of barrels collapsed. The
quake measured 5.2 in magnitude. Its epicenter was in the hills west
of the Napa Valley, three miles west-southwest of the town of
Yountville, and nine miles northwest of the city of Napa.
a major earthquake, the "Yountville Quake" caused extensive damage in
the city of Napa. In fact, the damage was much greater than one would
expect for the size of the quake.
According to the U.S. Geological
Survey, the "Peak shaking levels in the city of Napa were amplified
five to eight times relative to a station located in the mountains
less than a mile from the earthquake epicenter. Both the high levels
and local amplification help explain the surprising concentration of
earthquake damage through the city."
While earthquake shaking levels
depend on the distance from the earthquake source, the high level of
ground shaking in Napa also appears to be the result of two other
factors: first, the amplification of shaking by young sediments along
the Napa River, and second, the focusing of strong motion to the
southeast, the direction the earthquake rupture propagated.
are a lot of people who believe that the Sonoma and Napa Valleys are
isolated from earthquakes. This one showed we can have a serious quake
right here. And it was on an unknown fault. Yet seismologists report
that the fault with the highest probability of a 7.0 or higher
earthquake in the next 30 years is the Rodgers Creek Fault, which is
west of the Napa Valley and is actually the north section of the
Hayward Fault. According to the USGS, the Rodgers Creek Fault has a 32
percent probability of experiencing a magnitude 6.7 or greater
earthquake in the next 30 years. This is the highest probability of
any fault in the San Francisco Bay Area."
"If the Yountville Quake
had been a 5.4 instead of a 5.2--which in terms of energy released
would be four times as powerful--we would have seen a whole different
level of damage.