B-Line Eaton series imperial cable tray and ladder, 4" Height, 28.912" Length, 12" Width, Series 2-5 vertical inside bend, Aluminum, 60° Angle, 24" Ra

It is the fitting that takes a run of 12 inch wide, 4 inch deep aluminum ladder tray through a 60 degree change of elevation, bending toward the inside of the angle (tray rungs on the outside of the curve). Use it where the run has to drop or climb over an obstruction or follow a sloped ceiling. The bend is formed on a 24 inch radius, which is the bend radius the cable can follow through the turn.

Think about which side of the curve the cable rests on. A vertical inside bend, like the 4A-12-60VI24, curves with the tray bottom on the inside of the angle, so it is what you use when the run rises up and over something and then needs to come back down on the far side you would pair it with an outside bend. Get the two backwards and the fitting will not line up with the straight section, so confirm the direction of the elevation change at each point before ordering.

Allow about 28.912 inches of length for the fitting itself, on a 24 inch bend radius. That is the dimension to account for when you lay out straight section lengths on either side of the elevation change, since the fitting eats into the run and the leftover straight often has to be field cut.

Aluminum. It is the usual choice where weight matters or where a plated steel tray would corrode, and it does not need paint or galvanizing to hold up outdoors. Keep the whole run in one material where you can, since mixing aluminum tray with steel hardware invites galvanic problems at the splice.

Order Eaton B-Line part number 4A-12-60VI24. Reading the number: 4A is the 4 inch aluminum rail, 12 is the tray width, 60VI is the 60 degree vertical inside bend, and 24 is the bend radius in inches.

7.68 pounds. One person can set it on a ladder without a lift, which is one of the practical reasons aluminum tray gets specified for overhead runs.