B-Line Eaton series open racks, Steel, Telco gray powder coat, 45 mounting spaces, Top channel style, Seismic Zone 4, network bay open duct rack, AST

It is built as a Seismic Zone 4 network bay open duct rack, which is what you specify for the highest seismic design category telecom and data rooms. It is also UL Listed. Zone 4 rating depends on the rack being anchored per the structural drawing, so the floor anchorage and any top bracing still have to be engineered for the room.

Top channel style means the two uprights are tied together with a channel across the top rather than an open head. That channel is what you use to bolt into an overhead ladder rack or cable runway and to bay multiple frames together in a row, which is how these network bays get their lateral stability in a seismic room.

The frame alone is 119.33 lb. That is a two-person lift to stand a 108 inch frame upright safely, and the floor anchors have to carry that plus all the mounted gear and cable weight.

An open duct rack like the SB5872108TG gives you access from all four sides and unrestricted airflow, and it is the normal choice in a secured, dedicated telecom or MDF room where physical security is handled by the door. Go to an enclosed cabinet instead if the equipment sits in a shared space, a corridor, or any area where you need lockable doors and side panels. Open frames also depend on overhead cable management rather than built-in duct, so plan a ladder rack or runway above the row.

Steel, specified as ASTM A1011SS structural sheet steel, with a Telco gray powder coat. Powder coat over steel is the standard finish for telecom bays and it matches the Telco gray on most existing equipment frames, so a new bay drops into an existing row without a color mismatch.

The frame is 19 inches wide and the listed length/depth figure is 108 inches. Open racks are typically served from front and rear, so lay out working aisles on both sides in addition to the frame footprint, and leave room to swing 19 inch equipment into the mounting spaces.