AR2144 & AR2145 Leveling Feet and Castors The AR2144BLK and AR2145BLK NetShelter VX Seismic Enclosures do not ship with leveling feet or castors, and they are not offered as accessories. These cabinets are approved per NEBS GR-63-CORE (Seismic Zone 4) for seismic anchoring. Per the NEBS test, the AR8144BLK was placed on a shaking table and bolted to a steel plate, with no feet or castors. To maintain NEBS rating the rack must be used as tested. This rack is not for a raised floor environment. It is intended to be used directly on a concrete floor. There are floor mounting guidelines in the owner’s manual. For more information regarding seismic anchoring see the Knowledge Base and Tiger NetShelter document titled AR2144 & AR2145 Seismic Anchoring Requirements. If you need a seismic Zone-4 rated enclosure with castors and/or leveling feet please see our NetShelter SX product line and IBC rated bolt-down kits: http://www.apc.com/products/family/index.cfm?id=301 http://www.apc.com/products/family/index.cfm?id=325 Uncontrolled if printed. Electronic Storage and Reference Recommended. Rev. 20120416