B-Line Eaton series imperial cable tray and ladder, 4" Height, 51.000" Length, 36" Width, Series 2-5 vertical outside bend, Aluminum, 90° Angle, 48" R

A vertical outside bend carries the tray run up and over an obstruction, with the bend turning away from the cables (the cables ride on the outside of the curve). Eaton B-Line part 4A-36-90VO48 is a 90 degree vertical outside bend on a 48 inch radius, for 36 inch wide, 4 inch deep aluminum tray. Use it where the run has to change elevation upward over a duct or beam. Where the run drops down, that's a vertical inside bend instead, a different fitting.

Yes, the fitting is UL Classified. That matters on jobs where the tray is being used as an equipment grounding conductor or where the spec calls for classified tray throughout, since fittings and straights both have to carry the classification for the run to comply.

Yes, plan hangers on both sides of the transition. The fitting weighs 24 lb empty and spans 51 inches of run while changing elevation 90 degrees, so it needs support near each end rather than being cantilevered off the last straight section. Splice plates and hardware to join it to the adjacent straights are ordered separately.

The Eaton B-Line number is 4A-36-90VO48. Reading it across: 4 inch rail, aluminum, 36 inch width, 90 degree vertical outside bend, 48 inch radius. Give that number as-is to avoid getting the inside-bend version by mistake.

This bend is aluminum, which is the usual pick for corrosion resistance and light handling weight, and it keeps the fitting to 24 lb for a 36 inch wide, 90 degree piece that one or two people can set on the supports. Steel tray is the alternative where higher load capacity or a specific spec drives it, but aluminum and steel fittings are not interchangeable in the same run.