B-Line SB5842108TG Eaton series open frame racks, Steel, Telco gray powder coat, 12-24 panel mounting holes, 41 mounting spaces, Top angle style, Seismic Zone 4, network bay open duct rack, ASTM A1011SS

The SB5842108TG gives you 41 mounting spaces on a frame that stands 108 inches tall. That is usable equipment space for switches, patch panels and shelves across the full height of the bay, so plan your patch panel and switch stack against 41 spaces rather than a nominal 45U assumption.

Rails on the SB5842108TG are punched with 12-24 panel mounting holes, so you need 12-24 rack screws and cage-free tapped mounting. If your equipment ships with 10-32 hardware or square-hole cage nuts, that hardware will not thread into this rack and you will need 12-24 screws instead.

At 108 inches, this rack is nine feet tall, so it needs a room with clear height above nine feet once you allow for ladder rack, cable tray and sprinkler clearance. It is also 19 inches wide and weighs 92 pounds, so it moves through a standard doorway lying down but not standing up. Check the slab-to-obstruction height in the telecom room before it ships.

Yes. The SB5842108TG is built as a Seismic Zone 4 network bay open duct rack, which is the highest of the legacy seismic zone classifications and what specifiers call out for California and other high seismic regions. It has to be anchored to the floor per the seismic detail on the drawing to perform to that rating.

Yes. The frame is 19 inches wide, the standard EIA rack width, so 19 inch patch panels, switches and rack shelves land on the rails without adapters. The only thing to match is the hardware: the rails are tapped 12-24, so bring 12-24 screws for the mounting.

An open frame rack like the SB5842108TG is the choice when the room itself is secure and you want unrestricted access to cabling on all four sides, easy airflow, and lighter installed weight (92 pounds for the frame). Go with an enclosed cabinet instead when you need lockable physical security, dust control, or a contained airflow path. In a locked MDF or IDF closet, the open frame is the normal pick because patching and moves are faster with no doors or side panels in the way.

Top angle refers to how the top of the frame is finished: an angled top member that gives you a mounting surface for ladder rack, runway, or cable management hardware landing on top of the bay. If your design brings cable tray in overhead and ties it off to the rack, this is the top configuration you want.

Yes, the rack carries a UL Listing, which is typically what a healthcare, government or education specification calls for on telecom rack hardware alongside the Seismic Zone 4 requirement. Order it by the manufacturer part number SB5842108TG so the submittal matches.

Steel built to ASTM A1011SS, finished in Telco gray powder coat. ASTM A1011SS is a hot-rolled structural steel sheet specification, which is what gives the frame its load and seismic capability, and the powder coat is the standard telco gray that matches ladder rack and adjacent bays in most central office and telecom room builds.