B-Line Eaton series open racks, Steel, Yellow zinc, 12-24 panel mounting holes, 75 mounting spaces, Top channel style, Seismic Zone 4, network bay cl

The rails are punched with 12-24 panel mounting holes, so they're tapped-thread rails, not square-hole. You mount gear with 12-24 rack screws directly. No cage nuts, and square-hole equipment cages or snap-in hardware won't apply here.

Yes. The SB5778108YZ is built as a Seismic Zone 4 network bay closed duct rack, which is why it's 6 gauge steel rather than the lighter stock used on standard open frames. It is UL Listed.

A closed duct rack carries vertical cable duct built into the uprights, so patch and station cable is routed inside the frame rather than hanging off the side in add-on managers. That's the difference from a plain two-post open frame, where you buy vertical managers separately. If your bay is mostly patch panels and switch ports with heavy copper counts, the closed duct version keeps the fill contained; if you're racking deep servers, a two-post open frame plus separate managers is the more usual choice.

The rack itself is 130 lb before any equipment. At 108 inches tall and 6 gauge steel it's a two-person set and stand, and seismic anchoring to the slab is part of the install, not optional for a Zone 4 application.

Order Eaton B-Line model SB5778108YZ. It's the 108 inch, 23 inch wide, yellow zinc, 75 space closed duct network bay in one configuration, so there are no finish or height options to specify on it.

Steel with a yellow zinc finish. Yellow zinc plating is a corrosion coating suited to interior equipment rooms and telecom closets. It is not a powder coat, so for a wet or exterior-exposed location specify a rack finished for that environment instead.

Top channel style means the uprights are tied together by a channel across the top of the bay. That channel stiffens the frame and gives you the point to land overhead ladder rack or runway, and it's what lets bays gang together in a row.