Telcordia GR-63 Seismic Rated Enclosures

Crenlo’s Telcordia GR-63 Seismic qualified enclosures are designed to meet or exceed the Telcordia NEBS Zone 4 testing objectives and requirements. Seismic Zone 4 requirements are the most stringent of all, requiring that enclosures stay intact while experiencing the equivalent of an earthquake measuring up to 8.3 on the Richter scale.


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.


Don’t see the Telcordia enclosure you’re looking for?

We offer design services and solutions to meet the needs of any product specification, from examining current product prints to completing new product development. You can count on our expert resources and engineering capabilities to support any stage of your project, from concept to production. For more information on our capabilities download our Capabilities Brochure.



Cobalt Cab Video
Crenlo Enclosure Video