@J Wei - I asked for the thoughts of our VP of Operations and Division manager. They first said that a 7.0 will probably cause larger concerns than the fallout of the wine but for other earthquakes…
“Earthquake resistance is no more than making the front of the wine rack taller than the back. If they wish to keep what that have, I believe they could simply slide a 1 x 2 beneath the bottom front of the stacked cubes and make sure the top, back is secured to the wall. To do this, the bottom of the rack would need to be pulled away from the wall slightly and each of the units would need to be attached to each other. This method works far better with standard individual bottles since they provide each bottle the highest amount of friction. Bottles stacked atop each other, in bulk provide a fraction of that friction thus allowing them to slide out of the storage unit utilized.”
While that method is best, a more difficult method but more secure, “would be to put a plywood back on the racks and angle cut a couple 1x2 pieces. Screw those to the wall and secure the plywood to that backs to that slope in addition to the 1x2 Jack mentioned…that would ensure racks never move, but as Jack noted that does not guarantee bottles do not fall out…Putting a door on the front would be the only 100% way to keep them from falling out.”
