The SR45UB features a massive front-to-rear ventilation capacity that meets or exceeds server manufacturer requirements. Its integrated baying tabs make it easy to combine multiple enclosures in rows for data center applications. This enclosure is also compatible with hot-aisle / cold-aisle configurations. The SR45UB houses 3,500 lb (1588 kg) of standard 19" rack equipment in 45U. Its front and rear pairs of vertical rails have square mounting holes that are adjustable in quarter-inches increments from 4 to 37". Adjustment is quick and an easy-view depth index ensures consistent rail placement without requiring time-consuming measurements. Each rack space within the enclosure is numbered for ready reference. Two of the adjustable vertical mounting rails support toolless button-mount 0U installation of up to four compatible PDUs and cable managers. This feature makes it easier to route cabling to rack equipment and reduces cord clutter. With its locking, reversible, removable front and rear doors and locking, removable side panels, the SR45UB provides ultimate equipment safety. The side panels are half-size for ease of removal and reinstallation. The split rear door design allows the enclosure to be placed closer to a wall. The SR45UB meets all requirements toward PCI DSS compliance. The top panel of the SR45UB is vented to help remove warm air from the enclosure and draw in cool air by convection. The top panel includes ports for cable routing and can be quickly removed without tools. To facilitate cable access, the SR45UB is open-bottom. All components of the SR45UB are grounded to the enclosure frame. Front and rear threaded grounding points are provided for connection to the facility earth ground. The removable front and rear doors feature quick-release ground wires. To simplify deployment, the SR45UB comes with preinstalled casters that enable it to be easily maneuvered into the desired location, where it can be secured by adjusting the preinstalled levelers. Note: The casters are intended for minor position adjustments and are not designed for moving the enclosure over long distances. As part of the SmartRack family, the SR45UB is compatible with an extensive range of rack-mount accessories, enabling you to customize your solution to meet any requirement.