B-Line SB5842138TG Eaton series open frame racks, Steel, Telco gray powder coat, 12-24 panel mounting holes, 45 mounting spaces, Top angle style, Seismic Zone 4, network bay open duct rack

The rails are punched with 12-24 panel mounting holes, so you need 12-24 rack screws (and matching cage-free hardware) rather than 10-32 or square-hole cage nuts. If your existing gear is already racked on 10-32 screws elsewhere in the room, buy a box of 12-24 before install day so you are not mixing thread sizes.

The SB5842138TG is built as a Seismic Zone 4 network bay open duct rack, which is why it is specified for data rooms in high seismic regions. It is also UL Listed. Seismic performance depends on the rack being anchored to the floor and braced per the engineer's detail, so follow the structural drawing for anchors and overhead bracing.

An open frame duct rack like the SB5842138TG is a bolted steel frame with mounting rails and integral cable duct, open on all sides. Choose it in a secured telecom or data room where you want fast cable access, free airflow and high density. If the room is shared, public, or you need locked doors, dust control or directed cooling, an enclosed cabinet is the better call.

The rack weighs 107.88 lb before any equipment is loaded, and it stands 138 inches tall. That is a two-person lift minimum, and you want it anchored to the floor before anything is racked into it. Plan for the floor anchor detail and a lift or ladder for the upper mounting spaces.

There are 45 mounting spaces on the frame. Lay your equipment out against that number, allowing spaces for patch panels and horizontal managers, and remember the top spaces on a 138 inch tall bay are well above head height, so put the gear you touch often in the lower half.

The finish is a telco gray powder coat over steel, which is the standard color used across Eaton B-Line network bays, so it lines up visually with existing telco gray racks and ladder runway in a typical central office or MDF. Powder coat also holds up better than paint to cable pulls and equipment being slid in and out.

Top angle refers to the angled top member on the SB5842138TG frame, which is where overhead cable runway and bracing tie in. It is the detail that lets the bay be attached to the ladder rack and to overhead seismic bracing, so order your runway attachment hardware with it if the room does not already have runway in place.