B-Line Eaton series open racks, Steel, Computer white, 75 mounting spaces, Top angle style, Network bay open duct rack

75 mounting spaces, so 75 rack units of usable panel space in a single bay. That is taller than a standard 45U two-post frame, so plan on high-bay ceiling clearance and check your overhead cable tray and sprinkler heights before you set it.

The rails are tapped with 12-24 panel mounting holes. That means you mount equipment with 12-24 machine screws straight into the rail, no cage nuts and no square-hole hardware. If your switches and patch panels shipped with 10-32 screws or cage nuts for square-hole rails, you will need 12-24 screws instead.

Top angle style means the frame is finished with an angle at the top of the rack, which is where overhead ladder rack or cable runway ties in. Combined with the network bay open duct design, cable enters from above and drops into the vertical duct area rather than being routed through a closed cabinet. It is the layout used in telecom rooms where everything is fed from overhead tray.

Yes, the B-Line SB5846138CW carries a UL Listed certification, which is what most institutional and government telecom specs call for on open frame racks. The model number to put on the submittal is SB5846138CW.

An open duct rack like this one is the right call in a secured, dedicated telecom closet where you want full access to both sides of the gear and the cheapest path for high-density copper. There is no door, no side panels, and no locking, so it offers no physical security and no airflow containment. If the equipment sits in a shared space, a mechanical room, or anywhere the public can reach it, or if you need front-to-back airflow control for servers, buy a locking enclosure instead of an open rack.

Plan on the mounting hardware for your gear in 12-24 thread, floor anchors, and overhead support at the top angle. Grounding and bonding of the steel frame back to the room's telecom ground bar is also normally a separate item, as are vertical cable managers and any shelves. The rack itself is the frame.

Finish is Computer white on steel. If the racks already in your room are black, this will not match, so specify the same Computer white finish across the row when you are standardizing a facility. Matching finish also matters on Eaton B-Line accessories like vertical managers and shelves added to the bay.