B-Line SB5766090YZ Eaton series open frame racks, Steel, Yellow zinc, 12-24 panel mounting holes, 45 mounting spaces, Top angle style, Seiemic zone 4, network bay open duct rack, ASTM A570

The SB5766090YZ provides 45 mounting spaces on a 90 inch tall frame, so you get 45U of usable equipment height in a single bay. Rails are drilled with 12-24 panel mounting holes, which is the standard tapped thread for screwing switch and patch panel ears straight to the rail without cage nuts.

Yes. The SB5766090YZ is built as a seismic zone 4 network bay open duct rack and is UL Listed. That matters for data rooms in California and other high seismic areas where the structural engineer calls for a zone 4 rated frame. Anchoring to the slab and any required overhead bracing still has to follow the project drawings.

Plan for a 23 inch wide by 90 inch deep footprint, with the frame standing 90 inches tall. It weighs 121 lb bare, so budget two people to stand it up before any gear goes in, and leave aisle clearance on both sides since an open frame rack is accessed from front and back.

An open frame bay like the SB5766090YZ is the right call for patch fields, switches and cross connects in a secured room, where you want cable access from all four sides and unrestricted airflow. Go to an enclosed cabinet instead when you need locking physical security, dust control, or a shared space where non IT staff have access. This frame has no doors, side panels or locks.

The SB5766090YZ is the bare open frame bay itself, 121 lb of steel with 45 mounting spaces and tapped rails. Rack screws, vertical and horizontal cable managers, grounding kits, seismic floor anchors and any overhead runway are separate items you order alongside it.

Yellow zinc is a plated corrosion resistant finish over the steel, intended for indoor equipment rooms rather than a painted cosmetic finish. If your spec calls for black powder coat to match existing cabinetry in a visible space, this is not the finish for that, it is the utility finish used in telecom and MDF rooms.

Frame members are ASTM A570 grade 33 steel. That is a structural hot rolled carbon sheet steel grade with a 33 ksi minimum yield, which is what lets the frame carry a fully loaded bay and meet the seismic zone 4 duty it is built for.

Top angle refers to the angled steel member across the top of the frame, which stiffens the bay and gives you a mounting surface for overhead cable runway or ladder rack attachment. It is what ties multiple bays together in a lineup of network racks.