This 52U Heavy-Duty 4-Post Open Frame Rack helps IT managers organize their equipment array and provides fast, easy access to installed IT equipment. The SR4POST52HD is a simple solution for housing IT equipment in secure environments and other areas that don't require a lockable rack solution. This 52U rack features heavy-duty cold-rolled steel construction with a black powder-coated finish for durability. It supports stationary loads up to 3,000 pounds (1360.8 kilograms). The SR4POST52HD comes with all the hardware required for assembly and has a self-squaring design with bolt-down provisions. For high-density applications, multiple units can be bolted together side by side.The open design provides unobstructed airflow and easy access to equipment and cabling. It has numbered, square-hole mounting positions for easy installation of standard 19-inch rack equipment. The SR4POST52HD supports equipment depths up to 35 inches. This rack also accommodates toolless button-hole mounting for vertical PDUs and cable managers.The optional SRCASTERHDKIT Heavy-Duty Rolling Caster Kit (sold separately) adds mobility to the SR4POST52HD. The SR4POST52HD also supports optional side panels with the SR52SIDE4PHD, a set of two half-size side panels that add a finished look to end-of-row racks in your data center.