42" Outside Depth, 39.5" Useable Depth. Server Enclosure. Optimized for use with servers from leading manufacturers, Standard front and rear adjustable cage nut style rail with Z-rail adaptors to accommodate most server-slide kits, UL Listed in the US and Canada. Fully welded construction provides: Static load capacity: 10,000 lbs., UL Listed load capacity: 2,500 lbs., Seismic Certified load capacity: 1,090 lbs., Seismic certified to the following codes and standards: 2007 & 2010 CBC; 2006, 2009 & 2012 IBC; ASCE 7-05 (2005 Edition) & ASCE 7-10 (2010 Edition) and the 2006 & 2009 editions of NFPA 5000 for use in areas of high seismicity Zone 4 or Seismic Design Category (SDC) "D". These are designed for Mission Critical and/or High-Importance Installations in locations with the highest level of seismicity and top floor or rooftop installations including those within UBC and CBC Essential facilities or IBC, ASCE 7, and NFPA 5000 Seismic Use Group III facilities. For all codes, the Importance factor (Ip) is 1.5. Seismic Certified load capacity of 1,090 lbs. when used with WMRK-Z4 seismic floor anchor brackets. 24" overall width optimized for use on raised floors, Z-rail adaptors accommodates most server-slide kits, Configured for passive thermal management, Designed to allow fully integrated racks to be ganged, Removable split bottom rear panel allows cable bundles to be easily passed over or under the WMRK's key-locking split rear doors (standard on configured racks only), Rack top includes five integral gland grommeted 4" cable pass-through (48" depth includes seven cable pass-throughs), Stud in base of rack facilitates the proper grounding and bonding of electronic equipment, as per NEBS and NEC standards, Non-configured models do not include a rear door.