The Seismic Shelter™ has been extensively tested to meet the rigorous standards set forth by Network Equipment Building Systems (NEBS), Bellcore and the Uniform Building Code (UBC) for Zone 4. The 3500LB rating is capable of supporting today's dense rack configurations, making it perfect for blade servers or rack and stack/ship scenarios. This cabinet exceeds major server manufacturer spec's and is compatible with Dell™, Sun™, HP™, IBM, Cisco™ and other 19" rackable TIA/EIA-310-D compliant standard mounting equipment.