B-Line Eaton series open racks, Steel, Yellow zinc, 51 mounting spaces, Top channel style, Seismic Zone 4, network bay open duct rack, ASTM A1011SS

The SB5772140YZ network bay duct rack provides 51 mounting spaces, which is what you have available for patch panels, switches and rack-mount gear on a 19 inch mounting width. Plan your panel and equipment count against 51 spaces before you order, since an open frame rack cannot be extended vertically the way a stacked enclosure can.

Yes. The SB5772140YZ is built as a Seismic Zone 4 network bay open duct rack, so it is the version to specify where a drawing calls for seismic-rated open frame racking. It is also UL Listed.

Yes, the mounting width is 19 inches, the standard for rack-mount network and telecom gear, so standard 19 inch panels, shelves and switch ears land on it. The frame is top channel style, which is what the overhead cable duct and runway attach to.

137 pounds bare, before any equipment. That is a two-person set and stand, and the anchoring hardware and floor slab have to carry that plus the loaded weight of everything you mount in the 51 spaces.

An open duct rack such as the SB5772140YZ is the right call for a dedicated, secured telecom or IDF room where you want front and rear cable access and airflow with no doors in the way. It gives no physical security and no dust containment, so if the rack sits in a shared space, a corridor, or anywhere unauthorized people can reach it, use a lockable enclosed cabinet instead. Choose this one where the room itself is the security boundary and the seismic requirement is Zone 4.

Order Eaton B-Line model SB5772140YZ. That number covers the yellow zinc, 51-space, top channel Seismic Zone 4 network bay duct rack, and it is the single configuration offered under it.

Yellow zinc is a plated corrosion-resistant finish over the steel frame, not paint, so it holds up better than bare steel in a mechanical or unconditioned space. The frame steel is ASTM A1011SS structural-quality hot-rolled sheet. If you need a black or clear-finish rack to match existing bays in the room, this one will read yellow-gold against them.