B-Line Eaton series imperial cable tray and ladder, 4" Height, 31.692" Length, 24" Width, Series 2-5 vertical inside bend, Aluminum, 30° Angle, 48" Ra

A vertical inside bend carries a ladder tray run up or over an obstruction, with the fitting bending toward the inside (concave) side of the tray. The Eaton B-Line 4A-24-30VI48 makes that transition at 30 degrees on a 48 inch radius, so it is the piece you drop in where a 24 inch wide ladder run has to change elevation rather than direction in plan. If your run needs to change direction horizontally instead, that is a horizontal bend fitting, not this one.

It is sized for exactly that: 24 inch tray width and 4 inch side rail height, in aluminum. To land on an existing run it also has to match the series, and this fitting is a Series 2-5 part. If your straight sections are a different B-Line series or a steel tray, the rail profile and splice holes will not line up.

Allow roughly 31.692 inches of length for the fitting itself. That comes from the 48 inch bend radius at 30 degrees, so a tighter radius is not an option in this part number. Lay it out before you cut your straight sections, because the fitting eats that dimension out of the run.

UL Classified. That is the rating carried on this aluminum vertical inside bend, which is what most specs call for when the tray is used as an equipment grounding conductor path or is part of a classified cable tray system.

Order connecting hardware separately. The 4A-24-30VI48 is the bend fitting itself, so you will need the matching Series 2-5 splice plates and bolt sets at each end where it ties into the straight ladder sections, plus your hangers or trapeze supports on either side of the elevation change.

Direction of the curve relative to the tray's load surface. An inside bend, which is what the 4A-24-30VI48 is, curves toward the inside of the tray so the rung side is on the concave face, typically used where the run rises off a wall or climbs over an obstruction. An outside bend curves the other way and is used coming back down. Most elevation changes need one of each, so count both when you take off the job.

Eaton B-Line part number 4A-24-30VI48. Reading the code: 4 inch rail height, aluminum, 24 inch width, 30 degree vertical inside bend on a 48 inch radius. That is the full identity of the item, so a distributor can cross it without further description.