B-Line SB5763140YZ Eaton series open frame racks, Steel, Yellow zinc, 12-24 panel mounting holes, 45 mounting spaces, Top channel style, Seismic Zone 4, network bay closed duct rack, 11 gauge

The SB5763140YZ gives 45 mounting spaces, meaning 45 rack units of usable panel space on a frame that stands 140 inches tall. That is taller than a standard 7-foot two-post rack, so check your ceiling height, cable tray clearance and any overhead sprinkler or seismic bracing before you commit to it.

The rails are punched with 12-24 panel mounting holes, so equipment mounts with 12-24 machine screws directly into the tapped rail. No cage nuts or square-hole hardware are used, which also means square-hole-only cabinet hardware and snap-in cage nuts won't work here. Order 12-24 rack screws to suit.

It is built as a Seismic Zone 4 network bay closed duct rack, which is the highest of the legacy seismic zone classifications and the one that covers most of coastal California. It is also UL Listed. The Zone 4 rating depends on the rack being anchored per the installation requirements, so the floor anchorage and any top bracing have to be done to spec for the rating to carry.

Yes. The frame is 19 inches wide, which is the standard EIA rack width, so standard 19 inch switches, patch panels and rack shelves land on the rails. Deeper or heavier chassis gear intended for a four-post cabinet may still need a mounting shelf, since this is an open frame rack rather than an enclosure.

The SB5763140YZ is a closed duct network bay rack with a top channel style frame. The closed duct gives an enclosed vertical path for cable routing up the bay instead of loose cable draped on the outside of the uprights, and the top channel is the interface for ladder rack or runway coming off the top of the bay. It suits a telecom room where bays are ganged in a row and cable has to run overhead between them.

The rack weighs 131 lb and stands 140 inches, so it is not a one-person lift or stand-up. Plan on two or more people, and have the floor anchors laid out before you raise it, since an unanchored 140 inch frame is unstable on its own.

The frame is 11 gauge steel, which is the heavy-wall spec normally used for loaded two-post and network bay racks rather than the lighter gauges found on light-duty frames. Combined with the Seismic Zone 4 construction, it is intended for full bays of switch and patch gear, not just a couple of panels.

Order it as Eaton B-Line SB5763140YZ. That single part number covers the 19 inch wide, 140 inch tall, 45 space yellow zinc seismic bay with 12-24 rails; there are no finish or height options to specify against it.

The finish is yellow zinc plating over steel. It is a plated, electrically conductive finish rather than a paint coat, which is what you want when the bay is part of a bonded telecom grounding scheme, since bonding connections land on bare plated metal without having to scrape paint. Cosmetically it will not match black-painted racks in a row, so if you are extending an existing lineup of black bays expect a visual mismatch.