B-Line Eaton series open racks, Steel, Flat black powder coat, 12-24 panel mounting holes, 43 mounting spaces, Telco style, Self-supporting relay rac

No. The SB508108XUFB is a self-supporting relay rack, so the frame carries its own load without wall bracing or overhead ladder rack support. It stands 108 inches tall, 23 inches wide, and 48-11/16 inches front to back, and that deep base footprint is what makes it stable on its own. You still anchor it to the floor as your installation requires.

43 mounting spaces, which is the usable equipment capacity of the 108 inch frame. If you are laying out a room, count switches, patch panels and rack-mount UPS units against that 43 figure before ordering, since the rack itself cannot be extended.

The rails are tapped for 12-24 panel mounting holes, so your equipment mounts with 12-24 rack screws. Gear supplied with 10-32 hardware or cage nut clips will not thread into these rails, so order 12-24 screws and cup washers to match.

A Telco style open frame rack like the SB508108XUFB gives you two-post open access on all sides, which suits telecom, patch and cross-connect work where you are handling cabling constantly and want airflow with no doors in the way. Go with an enclosed cabinet instead when you need lockable security, dust control or four-post support for deep server chassis. This frame is a two-post open rack, not a cabinet.

Yes, the SB508108XUFB carries a UL Listed marking, which is what most institutional and government specs call for on rack framing in a communications room. That is the rating stated for this rack.

11 gauge steel to ASTM A1011SS, finished in flat black powder coat. That is the heavy end of open rack construction and it is what lets the frame stand free rather than needing top bracing. The flat black finish keeps it matching typical telecom and MDF room hardware.