B-Line Eaton series open racks, Steel, Flat black powder coat finish, 25-1/4", Self supporting relay rack, 11 gauge, ASTM A570

No. The SB5558084TG is a self supporting relay rack, so the frame stands on its own once anchored to the floor. That is the difference between this style and a wall mounted or ladder-supported frame. Most installers still tie the top channel into overhead cable runway where the room has it, but the rack does not depend on it for stability.

The SB5558084TG open frame relay rack stands 84 inches tall with 3 inch wide uprights, and it weighs 96.6 lb. That is the standard full-height floor rack size for a telecom or IT room, and the weight is worth knowing before you plan the lift, since it is a two-person set even before any equipment goes in.

Construction is steel at 11 gauge, meeting ASTM A570 for hot rolled carbon steel sheet and strip. Eleven gauge is the heavy end for open frame relay racks, which is why the frame carries 96.6 lb of its own weight. It is the right choice for switchgear, batteries, and densely loaded network shelves rather than light patch-only duty.

Unequal flange means the two faces of the upright are different widths, so the equipment mounting face sits forward while the deeper flange gives you a wider surface behind for vertical cable management and hardware. Closed duct adds an enclosed channel in the upright for routing jumpers up the frame instead of hanging them off the side. Choose it where cable volume is high and you want the runs contained; a symmetrical equal flange rack is simpler and fine for light patch fields.

What you are ordering is the open frame itself, an 84 inch self supporting steel relay rack. Shelves, vertical cable managers, rack screws, and floor anchors are separate items, so plan the accessory list with the frame. Anchors in particular depend on your slab, which is why they are never packed with the rack.