B-Line Eaton series open racks, Telco gray powder coat, 12-24 panel mounting holes, 66 mounting spaces, Top channel style, Seismic Zone 4, network ba

The rails on the SB5777108TG come punched with 12-24 panel mounting holes, so patch panels, switches and shelves with 12-24 hardware bolt straight to the uprights. No cage nuts or square-hole clips are needed. If your gear ships with 10-32 or M6 screws you will need to swap to 12-24 fasteners.

66 mounting spaces is the usable panel capacity of this B-Line open frame rack, and a mounting space is the standard 1.75 inch rack unit, so it takes 66U of panels, switches and shelves. That is more than the 45U you get from a typical enclosed cabinet, which is why network bays like this one are used for high-density patch fields.

The SB5777108TG is built as a Seismic Zone 4 network bay open duct rack, which is the highest of the legacy zone classifications and the one that covers most of coastal California. The frame is UL Listed. Seismic performance still depends on the anchorage, so the concrete anchors and any overhead bracing have to be specified and installed to the engineer's detail for your room.

An open frame like this B-Line network bay gives you access from all four sides, unrestricted airflow, and 66 mounting spaces of capacity in a 23 inch wide footprint, which suits patch panels, cross-connects and switches in a secured room. Choose an enclosed cabinet instead when the equipment sits in a shared or public space and needs locking doors, or when you want contained front-to-back airflow for servers. This frame has no doors or side panels.

Top channel construction means the two uprights are tied together by a channel across the top rather than left open. That channel stiffens the bay and gives you a place to land ladder rack, runway or overhead cable duct above the frame, which is how these network bays are ganged into a row. It also matters for seismic installs, where overhead bracing is usually attached at the top of the frame.

Yes. It is an open duct network bay, a freestanding two-post frame at 108 inches tall and only 23 inches wide, so it has to be anchored to the slab to stand safely, and the Seismic Zone 4 rating only applies once it is properly anchored. Floor anchors are not part of the frame; order concrete anchors sized to the engineer's detail separately.

Frame steel is ASTM A570 grade 33, a structural-quality hot rolled sheet with a 33 ksi minimum yield. That is the material basis for the load and seismic ratings on a network bay this tall, and it is worth citing when a submittal asks for the frame material rather than just the finish.

Finish is Telco gray powder coat, the standard gray used across telecom and network bay frames, so a row of these will read the same as existing telco-gray racks and ladder rack. Only one finish is offered on the SB5777108TG, so there is no black or white option to specify.