B-Line Eaton series open racks, Yellow zinc, 12-24 panel mounting holes, 51 mounting spaces, Top channel style, Seismic Zone 4, network bay open duct

The SB5771108YZ is built as a Seismic Zone 4 network bay open duct rack, Zone 4 being the highest seismic classification used for rack anchorage requirements. It is also UL Listed. Anchorage to the slab and any overhead bracing still has to follow the structural drawings for your site.

The top channel construction gives you a continuous channel across the head of the bay to land ladder rack or tray and route cable down into the open duct sides. It is the reason this is called a network bay open duct rack: the vertical duct areas carry patch cord bulk beside the mounted equipment rather than through the middle of it.

Steel, specifically ASTM A1011SS hot rolled structural sheet, with a yellow zinc surface finish. Yellow zinc is a plated, conductive finish, which is useful where you want the frame to bond for grounding rather than fight a painted coating. It is intended for dry indoor telecom and data room use, not exterior exposure.

The rack weighs 130 lb on its own. That is a two-person lift to stand a 108 inch bay upright and walk it into position, and it says nothing about the floor loading once it is populated. Add your equipment weight to that 130 lb when checking raised floor or slab capacity.

An open frame bay like the SB5771108YZ leaves all four sides accessible, which is what you want for dense patching and copper cross-connect work where you are in the rack constantly. It gives you no doors, no locks, and no airflow containment. If you need physical security, dust control, or front-to-back containment, order an enclosed cabinet instead. For an MDF or IDF telecom room with controlled access, the open bay is the usual choice.

The bay itself is the frame with 12-24 punched rails and a top channel. You will still be sourcing separately: floor anchors sized to your slab and the seismic detail, 12-24 rack screws for every piece of equipment, vertical and horizontal cable managers if you want more than the open duct sides, a grounding busbar and bonding conductor, and ladder rack or tray to land on the top channel.

No. It carries 51 mounting spaces rather than the common 45U, in a 108 inch tall frame. If your elevation drawing is laid out for a 45U bay you will have extra rack units at the top and bottom, which is usually welcome but changes where fixed-height equipment lands.

The manufacturer part number is SB5771108YZ, from the Eaton B-Line series open frame rack line. The YZ suffix corresponds to the yellow zinc finish.