B-Line SB5877108TG Eaton series open frame racks, Steel, Telco gray powder coat, 12-24 panel mounting holes, 51 mounting spaces, Top channel style, Seismic Zone 4, network bay open duct rack

The SB5877108TG gives you 51 mounting spaces on a 108 inch tall frame. That is enough for a full network bay build of patch panels, switches, and rack-mount gear in one upright. Plan your ceiling clearance around the 108 inch height before you set it, since it needs overhead room for cable tray or ladder rack drop as well.

The rails are punched with 12-24 panel mounting holes, so 12-24 rack screws thread directly into the rail. No cage nuts or square-hole hardware. If your gear shipped with 10-32 screws or with cage nuts for square-hole rails, you will need 12-24 screws instead.

The SB5877108TG is built as a Seismic Zone 4 network bay open duct rack, which is the highest of the legacy seismic zone classifications, and it is UL Listed. It still has to be anchored to the slab per the engineer's detail on your drawings, and in most jurisdictions the anchorage is what the inspector signs off on.

Footprint works out from a 23 inch width and 108 inch length/depth dimension, with the frame standing 108 inches tall. The frame itself weighs 132.62 lb bare, before any equipment load, so figure two people and a pallet jack to get it into the room.

An open frame duct rack like the SB5877108TG is what you want for a dedicated, controlled telecom or MDF room: open sides mean unrestricted airflow, easy access to both sides of the gear, and simple cable management into the duct. What it does not give you is physical security or dust protection. If the rack sits in a shared space, a warehouse, or anywhere the public can reach it, specify an enclosed cabinet with locking doors instead.

Steel construction in 11 gauge, finished in Telco gray powder coat. The 11 gauge material is what lets a single open frame carry a full bay of loaded equipment across 51 mounting spaces without the uprights racking.

Order Eaton B-Line part number SB5877108TG. That single number covers the 108 inch, 51 space, 12-24 tapped, Telco gray Seismic Zone 4 network bay open duct rack, so there is no finish or height option to specify with it.

Finish is Telco gray powder coat, the standard gray used across telecom and central office racking, so it lines up visually with existing B-Line and other Telco gray bays. Only one finish is offered under part number SB5877108TG.

Top channel means the frame is finished with a channel across the top of the uprights rather than an open top. That channel is the tie-in point for overhead cable runway, ladder rack, or bracing back to the wall or to the next bay in a lineup, which is how you gang several of these into a continuous row.