B-Line Eaton series open racks, Universal spacing, Steel, Telco gray powder coat, 12-24 panel mounting holes, 45 mounting spaces, Top channel style,

45 mounting spaces on a 90 inch tall frame. That is the usable panel height for switches, patch panels and shelves, so plan your gear stack against 45 RU rather than assuming a 45U cabinet equivalent with extra clearance.

The rails are punched with 12-24 panel mounting holes, so bring 12-24 rack screws and cage-nut-free equipment ears. Gear supplied with 10-32 hardware will not thread in, and equipment with square-hole cage nuts is not what this frame is punched for.

Yes. The SB5858090UTG is a Seismic Zone 4 network bay closed duct rack, and it is UL Listed. Seismic performance depends on anchoring it to the floor per the installation requirements, so budget for the anchors and, in a raised-floor room, the floor-penetrating hardware.

Dimensions are 90 inches high, 23 inches wide, and 90 inches for the length/depth figure. The 23 inch width is what matters for bay-to-bay spacing when you gang multiple frames in a row; check the 90 inch figure against your aisle layout before committing the room plan.

An open frame two-post style bay like this one gives all-around cable access and free air movement, which suits telecom rooms and patch-heavy bays where you are working the terminations constantly. Go to an enclosed cabinet instead when you need lockable physical security, dust control, or containment airflow for dense servers. This frame is open, with a top channel style for overhead cable routing.

The top channel construction is the running rail across the top of the frame, and it is what lets you tie ganged bays together and land ladder rack or overhead cable runway above the row. If your room has overhead cable tray, this style is the one that mates to it rather than requiring a separate standoff bracket at each bay.

Steel with a Telco gray powder coat, which is the standard gray used across telecom equipment rooms, so it lines up visually with existing telco-gray bays and cable runway. Powder coat over steel holds up to the handling a comms room sees.

81.71 lb for the frame itself. That is a two-person carry and stand-up in a finished comms room, and it means the loaded weight on the floor is almost entirely your equipment, not the bay.