B-Line SB5769090YZ Eaton series open frame racks, Steel, Yellow zinc, 12-24 panel mounting holes, 50 mounting spaces, Top angle style, Seismic Zone 4, closed duct unequal flange rack, 6 gauge, ASTM A1011SS

The SB5769090YZ gives 50 mounting spaces on a 90 inch tall frame, tapped 12-24 for panel mounting. That is 50 usable EIA panel spaces for equipment with 12-24 screws, so plan your gear list against 50 spaces rather than the full 90 inches of steel, since the top angle and base consume height that is not drilled.

Yes. The SB5769090YZ is built as a Seismic Zone 4 closed duct unequal flange rack, and it is UL Listed. It is fabricated from 6 gauge steel to ASTM A1011SS, which is what carries the seismic rating. The rack itself is the rated component, so the anchorage and any top bracing still have to be installed per the project's seismic details.

The frame is tapped with 12-24 panel mounting holes, so any equipment you mount needs 12-24 screws and, for heavier gear, cage-free 12-24 hardware or support angles. If your existing installed base uses 10-32 screws, they will not thread into this rack, and you will need to change over to 12-24 for anything hung on the SB5769090YZ.

Unequal flange means the two legs of the channel are different widths, giving a deeper flange on one side for cable duct or wire management along the vertical, while the closed duct forms an enclosed raceway in the upright itself for conductors running up the rack. That matters if you want cabling contained inside the frame rather than hung on external managers. The SB5769090YZ is built this way and uses a top angle at the head of the frame.

An open frame rack such as the SB5769090YZ leaves all four sides accessible, which is what you want for patch panels, terminations, and gear you service often, and it does not restrict airflow. Go to an enclosed cabinet instead when you need physical security, dust control, or ducted cooling. This one carries 50 mounting spaces and a Seismic Zone 4 rating, so it covers code-driven installs without going to a cabinet.

Order it as B-Line SB5769090YZ, an Eaton B-Line series open frame rack. The YZ suffix is the yellow zinc finish. There is a single configuration under that number, so no additional option codes are needed.

Yellow zinc plating over the 6 gauge steel is a dry-location, indoor finish. It suits electrical rooms, IDF closets, and telecom spaces where humidity is controlled. For outdoor, wash-down, or corrosive environments, specify a hot dip galvanized or painted rack instead.

At 121 lb bare steel, it is a two-person set and stand, and you will want the anchor layout marked and drilled before standing it up. Once it is plumb at 90 inches tall, anchor it to the slab before loading equipment, particularly given it is being used to satisfy a Seismic Zone 4 requirement.