B-Line SB5777140YZ Eaton series open frame racks, Steel, Yellow zinc, 12-24 panel mounting holes, 67 mounting spaces, Top channel style, Seismic Zone 4, network bay open duct rack

The SB5777140YZ gives you 67 mounting spaces, so 67 rack units of usable panel height. Mounting spaces are the standard 1U increments equipment is punched for, so a stack of 1U switches, 2U patch panels and 4U chassis just has to total 67 or less.

Tapped. The rails carry 12-24 panel mounting holes, so equipment and patch panels bolt straight in with 12-24 rack screws. No cage nuts, and no square-hole cabinet hardware.

It is built as a Seismic Zone 4 rack, which is the highest of the legacy seismic zones and the one covering coastal California. That rating depends on it being anchored and braced as the assembly intends, so the floor anchorage detail on your drawings still has to be followed.

Yes, it is UL Listed, which is usually what an institutional or federal spec is asking for on rack and frame products. Combined with the Seismic Zone 4 construction, it covers the two items most often called out on a healthcare, education or government IT room submittal.

Top channel style means the bay is built to carry overhead cable duct and runway off the top of the frame, which is how network bays are ganged in a row so copper and fiber can run from bay to bay above the equipment. If you are setting one isolated rack in a small closet with no overhead pathway, a short standard two post rack is the simpler buy. Choose the top channel network bay when you are building a lineup with a cable ladder system over it.

No. What you are ordering under model SB5777140YZ is the open steel frame itself, with 12-24 tapped rails and 67 mounting spaces. Vertical cable managers, overhead duct and runway, rack PDUs, shelves and 12-24 mounting screws are all separate line items, so add them to the order if the job needs them.

The frame is steel with a yellow zinc surface finish, a plated corrosion-resistant coating rather than a painted or powder coated one. Because the plating is conductive, the frame does not need paint scraped off at the joints the way a painted rack does, which matters when you are landing a rack bonding conductor.

At 137 pounds and 140 inches of length, this is a two-person minimum handling job and realistically a three-person lift to stand upright. It ships as a frame, not on casters, so plan floor anchors and a lift plan before it lands on site.