B-Line Eaton series open racks, Steel, Telco gray powder coat, 12-24 panel mounting holes, 75 mounting spaces, Top channel style, Seismic Zone 4, ope

The SB5856138TG provides 75 mounting spaces on a frame 138 inches tall. That is a full-height telecom rack, so measure your ceiling and any overhead cable tray or ladder rack clearance before committing to it.

The mounting rails are drilled and tapped 12-24, which is the standard thread for telecom and network equipment panels. You thread screws directly into the rail, so no cage nuts are needed, but any gear supplied only with 10-32 or M6 hardware will need 12-24 screws instead.

Yes. The SB5856138TG is built as a Seismic Zone 4 open duct unequal flange rack, which is what specifying engineers call out for the highest seismic design category. It is also UL Listed. Bracing and anchorage to the slab and overhead structure are still part of the install per your approved drawings.

On an unequal flange rack the two flanges of the upright are different widths, which gives you a deeper open duct channel on one side for vertical cable routing and heavier equipment support. Pick it when you are running large bundles of copper or fiber up the side of the frame. An equal flange upright is the simpler choice for light patch-and-switch work where cable volume is low.

Frame width is 23 inches and the depth figure given is 138 inches, with a shipping-relevant product weight of 107.13 lb. The 23 inch width matches standard 19 inch EIA equipment plus rail flanges, so it lines up in a row with other 19 inch racks.

Top channel style means the uprights are tied together with a channel across the top. That channel is the attachment point for overhead ladder rack or cable runway and for the upper seismic bracing, which is how a 138 inch open frame gets its stability. Plan your overhead support to land on it.

An open frame like the SB5856138TG leaves all four sides exposed, which is what you want for patch panels, cross-connects and switches where airflow and cable access matter and the room itself is secured. If the equipment needs to be locked up in a shared or public space, or kept out of dust, a fully enclosed cabinet is the better call, since this frame offers no doors or panels.

Finish is Telco gray powder coat over steel, the standard gray used across the Eaton B-Line open frame line, so it reads the same as existing telco racks and ladder rack in most data rooms. If your room was built with black racks, it will not match.