B-Line SB5877140TG Eaton series open frame racks, Steel, Telco gray powder coat, 12-24 panel mounting holes, 67 mounting spaces, Top channel style, Seismic Zone 4, network bay open duct rack, 11 gauge

The SB5877140TG gives you 67 mounting spaces, which is why it stands 140 inches tall. That is well above a standard 45U two-post, so check your ceiling height, overhead ladder rack and any seismic bracing clearance before you commit. It is a network bay open duct rack, so the tall frame is meant for high-density patch and cross-connect work in a telecom room.

Yes. The SB5877140TG is built as a Seismic Zone 4 network bay rack, in 11 gauge steel with a top channel style frame. Seismic Zone 4 is the highest-demand zone under the older UBC zoning that telecom and data center specs still reference, so this is the frame you spec when the drawing calls for seismic anchorage. It is also UL Listed.

Rails are tapped 12-24 panel mounting holes, so you need 12-24 rack screws and cage nuts are not used. If your shop stocks 10-32 hardware from older telco racks, it will not thread here. Equipment with standard EIA panel spacing mounts directly.

Overall frame width is 23 inches, which is the normal footprint for a 19 inch EIA equipment rack once you account for the rail flanges and duct channel. Plan aisle layout and floor anchor spacing off the 23 inch dimension, not off the panel width.

The frame alone is 153.26 lb of 11 gauge steel at 140 inches tall. That is a two-person set at minimum, and you want it anchored to the floor and tied to overhead ladder rack before any gear goes in, given the height-to-footprint ratio.

An open duct rack like the SB5877140TG is the right call where you need fast cable access on all four sides and passive cooling, typical of patch panels, cross-connects and network switches in a secured room. Choose an enclosed cabinet instead when you need physical security for the gear, dust control, or door-mounted airflow management. The open frame's top channel also gives you a ladder-rack tie point that a cabinet top does not.

Yes, the SB5877140TG carries a UL Listed marking, which is usually what an institutional or government submittal is looking for on rack hardware alongside the Seismic Zone 4 designation.

It is finished in telco gray powder coat, the standard central-office gray used across Eaton B-Line network bays, so it lines up visually with existing telco-gray rows. Steel construction with powder coat is intended for indoor equipment rooms.