B-Line Eaton series open racks, Steel, Flat black powder coat finish, 48-11/16", Self supporting relay rack, 11 gauge, ASTM A570

It's a self-supporting relay rack, so it stands on its own floor footprint without wall or overhead bracing. It's built from 11 gauge steel to ASTM A570 and weighs 93 lb bare, so anchoring the base to the slab is still normal practice in a live equipment room before you start loading gear.

An open frame relay rack like this one gives you access from both sides with no doors to swing, which is what you want in a secured, climate-controlled telecom or IDF room where technicians patch often. It's a closed duct unequal flange design with a top channel for cable management and overhead ladder tie-in. If the equipment sits in a public corridor, warehouse, or dusty mechanical space, use an enclosed cabinet instead, because an open rack offers no physical security or dust protection.

Yes, the rack is UL Listed, which is usually what an institutional or government spec is asking for on rack and frame submittals. The steel is 11 gauge to ASTM A570.

The surface finish on record for model SB5559096TG is Telco gray powder coat, the standard telecom equipment-room color. Other Eaton B-Line open frame racks are offered in flat black powder coat, so if you're matching an existing row of black frames, order the black version rather than this one.

It's a double sided rack, so gear and cable management can be worked from front and rear rather than front only. That's the reason to leave service clearance on both faces when you lay out the room instead of pushing it against a wall.

The unequal flange profile gives one deeper flange, which creates a closed duct channel along the upright for running and dressing cable inside the frame rather than strapping it to the outside. Paired with the top channel, it lets you bring cable down from overhead ladder rack and keep it captive on the way to each panel.

11 gauge steel to ASTM A570 is the standard structural grade for self-supporting open frame racks and is a step up from lighter 14 gauge frames used for patch-only applications. The frame itself weighs 93 lb, so the bulk of what the floor sees will be the equipment. For a heavy UPS at the bottom, keep the weight low in the frame and anchor the base.