This SmartRack 42U enclosure is designed for network wiring closets, retail locations, classrooms, back offices and other areas with essential rack-mount IT equipment. It is 800 millimeters (31.5 inches) wide to allow more room for cable management and PDU mounting along the sides of the rack, which permits free front-to-rear airflow. Constructed from heavy-duty steel with a durable black powder-coated finish, the SR42UBWD8 has a maximum stationary load capacity of 3000 pounds (1361 kilograms) and a maximum rolling load capacity of 2250 pounds (1021 kilograms). The reversible front door, split rear doors and half-size side panels lock securely with the included keys to help prevent damage, tampering or theft. The doors, side panels and roof panel are designed for quick release, making it simple to access connected equipment and cabling with little effort. The roof panel has strategically placed pass-throughs to accommodate cables from vertical 0U PDUs and other connected equipment. The perforated doors allow generous airflow from front to rear to keep your equipment cool and functioning at their peak.