The Adjustable Depth 4 Post Rack System is designed to support network equipment found in data center, telecommunication room, and lab environments. The rack combines the stability of a cabinet with the accessibility of an open rack to provide the user with maximum flexibility when designing the network layout. Front and rear weldments with adjustable front-to-back braces provide the required strength and flexibility needed to work with various types of active equipment. The open design allows for maximum airflow in and around the rack.