B-Line Eaton series imperial cable tray and ladder, 6" Height, 32.692" Length, 18" Width, Series 2-5 vertical inside bend, Aluminum, 30° Angle, 48" Ra

A vertical inside bend carries the tray run up or down while keeping the cables on the inside of the curve, so the bend turns toward the tray's interior rather than away from it. The B-Line 6A-18-30VI48 makes that elevation change at 30 degrees with a 48 inch radius, which keeps the cable bending radius generous enough for large power or data bundles. If your run needs to turn the other way around an obstruction, you want a vertical outside bend instead, not this fitting.

That is exactly what it is sized for. The 6A-18-30VI48 fitting is an 18 inch width with a 6 inch loading depth in aluminum, matching Eaton B-Line Series 2 through 5 aluminum ladder tray of the same width and rail height. Mixing widths or rail depths at a fitting leaves you splicing mismatched rails, so keep the fitting width and height identical to the straight sections it joins.

Order your splice plates and connection hardware separately. The 6A-18-30VI48 is the bend fitting itself, an aluminum 30 degree vertical inside bend in 18 inch width. Every fitting needs a splice connection at each end to the adjoining straight tray, so count two sets per bend when you build the material list, and match the splice type to your Series 2 through 5 tray.

Cable minimum bending radius is what decides it. A 48 inch radius gives large diameter power feeders and fiber a gentle sweep through the elevation change without exceeding their allowable bend, which is where insulation damage and fiber loss come from. Tighter radius fittings save ceiling space but restrict what cable you can pull through them, so on a heavy feeder or fiber run the wider 48 inch sweep is the safer call.

It weighs 8.7 pounds. An 18 inch wide aluminum fitting at that weight is a one man lift onto trapeze hangers, which is a large part of why aluminum gets specified over steel on long overhead runs. Aluminum also holds up in damp and corrosive areas where painted steel would need coating maintenance.

The manufacturer part number is 6A-18-30VI48, an Eaton B-Line imperial cable tray fitting: 6 inch height, 18 inch width, 30 degree vertical inside bend, 48 inch radius, aluminum. The number reads directly off the spec, so a distributor cross referencing it can confirm width, angle and radius from the designation itself.