B-Line Eaton series double sided 24 inch shelf width distribution , 140" height, 37.62" length, 24" width, 3 vertical with 16 shelves, ASTM A36 struct

It is the steel skeleton that carries terminal blocks for central cross connects in a telecom or MDF room. Double sided means blocks mount on both faces of the frame, doubling termination capacity in the same floor space, which is why these are used for main and intermediate distribution frames rather than single sided wall-mount bays. The SB60314003TG is built with 3 verticals carrying 16 shelves.

Three verticals and 16 shelves, with 24 inch shelf width. The shelf count is what determines how many rows of terminal blocks you can land, so if your block count needs more rows you want a taller or wider frame configuration rather than trying to add shelves to this one.

What you get is the frame: verticals, 16 shelves, and the structural steel assembly in Telco gray. Terminal blocks, protector modules, jumper troughs, vertical cable rings, ladder rack, and floor and ceiling anchors are ordered separately and chosen to match your termination scheme.

ASTM A36 structural steel with a Telco gray powder coat. That is the standard finish in central office and MDF rooms, so it matches existing B-Line frames and racks already in most telecom spaces. Powder coat over structural steel also means it takes the mechanical load of loaded blocks without the flex you get from lighter formed sheet.

The SB60314003TG is a structural steel mounting frame, not an electrical device, and no certification applies to it. It is the mechanical support for terminal blocks; the listings your inspector cares about will be on the blocks, protectors, and cable you mount to it.