Fully Welded Design: Full welding provides for an especially rigid structure. For the best results possible, be sure to opt for welded equipment-mounts as well… they’ll help to further reinforce the frame’s strength.
Appropriate Mounting Hardware: It’s best to use locking nuts and washers when installing rack-mount accessories in seismic cabinets. Even if the shelves or drawers are welded or flanged, a little extra strength never hurts, and locking hardware serves just that purpose.
A Heavy-Duty Door: Instead of the single latch-point found on most non-seismic enclosures, be sure that the door of your earthquake worthy cabinet has a minimum of three. Extra door latchings, combined with high-quality hinges, give extra insurance in the face of the flexing and twisting that comes with intense seismic events.