Network Rack, Fixed Rack Shelf, 4 Post, 20in Depth | 1904-1-001-01Description Description Fixed Rack Shelf The Kendall Howard Full 20" Fixed Rack Shelf is one heavy duty shelf! It has the capacity to hold up to 300 lbs. of equipment and can be mounted on both the front and rear rails for maximum strength. The 20" Fixed Rack Shelf was designed to complement our Portable Modular Rack Systems. The solid, 4 point shelf is perfect for supporting non rack mountable IT equipment such as UPS's, battery backups, servers,