B-Line Eaton series open racks, Yellow zinc, 12-24 panel mounting holes, 58 mounting spaces, Top channel style, Seismic Zone 4, network bay closed du

Yes. The Eaton B-Line SB5774090YZ open frame rack is built as a Seismic Zone 4, network bay closed duct rack, and it is UL Listed. That is the rating stated for the part, so it is the version to specify when the drawing calls for Zone 4 seismic anchorage on the rack itself.

58 mounting spaces, which is the usable panel mounting capacity on the rails. At 90 inches overall height, plan your equipment layout against those 58 spaces rather than the outside dimension, since the top channel and base consume height that is not available for gear.

12-24. The mounting rails on the SB5774090YZ are punched with 12-24 panel mounting holes, so bring 12-24 rack screws and cage-free hardware. 10-32 screws will not thread correctly, and that is the most common mix-up when adding gear to an existing room where older racks were tapped 10-32.

Yes. The rack is 19 inches wide, the standard EIA panel width, so 19 inch switches, patch panels, and rack mount UPS panels land on the rails without adapters.

Height and depth are both listed at 90 inches, with a 19 inch width, so lay out the floor footprint off that 90 inch depth figure plus your working clearance front and rear. The unit weighs 121 lb bare, before any equipment load, which matters for both the floor anchorage detail and getting it into the room.

An open frame rack like this one is the choice when access and airflow matter more than security: all four sides stay open for cabling, and the closed duct top channel design routes cable into overhead ladder or duct runs. Go to an enclosed cabinet instead when the room is shared or public and the gear needs to be locked away, or when you need contained front to back airflow for high density servers.

The frame is ASTM A1011SS steel with a yellow zinc finish, a plated corrosion resistant coating intended for indoor equipment room use. It is not a painted or powder coated exterior finish, so keep it in conditioned or at least dry interior space, not outdoors or in a washdown area.