B-Line Eaton series open racks, 340 lb, Steel, Telco gray powder coat, 12-24 panel mounting holes, 77 mounting spaces, Top angle style, Seismic Zone

It is built as a Seismic Zone 4 network bay open duct rack, which is the highest seismic zone classification, and the frame is UL Listed. Zone 4 rating applies to the rack as anchored, so the floor anchorage and any overhead bracing still have to be installed per the engineer's detail for your building.

Top angle refers to the angled top member on the frame, which is what runway, ladder rack and overhead cable tray attach to in a telecom room. It is the style you want when cabling drops from an overhead runway rather than from below a raised floor.

The frame is ASTM A570 grade 33 steel with a telco gray powder coat, which is the standard gray used across telecom equipment bays, so it lines up visually with existing B-Line and telco frames in the same room. The rack itself weighs 152.53 lb.

An open duct rack like the SB5861140TG gives you unobstructed access to both sides and easy cable management, which is why it is the norm in telecom and MDF rooms where the room itself is secured. Go with an enclosed cabinet instead when you need locked physical security, dust control, or door-mounted fans for heat. With 340 lb capacity and a 19 inch frame, this rack is aimed at patch and network gear, not loaded server stacks.

What you get is the open frame itself, 19 inches wide, 140 inches tall, with 12-24 tapped rails. Vertical cable managers, overhead runway, ladder rack, floor anchors and 12-24 rack screws are separate items, so budget those into the same order to finish the install.