B-Line Eaton series imperial cable tray and ladder, 4" height, 27.47" length, 42" width, Series 2-5 vertical inside bend, 45°, 24" radius, Aluminum

A vertical inside bend carries the tray run up or down through a 45 degree change in elevation, with the fitting turning toward the inside of the angle (the tray bottom on the concave side). The B-Line 4A-42-45VI24 is built for a 24 inch radius turn, which is the bend radius the cable sees as it transitions. Use it where a run has to climb over an obstruction or drop to a lower elevation without breaking the tray.

Allow about 27.47 inches of linear run for the fitting itself, measured along the tray. That is the published length of the 45 degree, 24 inch radius vertical inside bend, and it is the number to use when you lay out the elevation change and figure where your next straight section and supports land.

Both change the elevation of a tray run, but they turn opposite ways relative to the cables. An inside bend, like the 45 degree 24 inch radius fitting here, curves with the tray bottom on the concave side, so it is what you use going up from a horizontal run or coming down into one from above. An outside bend curves the other direction. Getting the two mixed up is the most common ordering mistake on a riser, so check which way the elevation change goes before you buy.

It carries a CSA certification, which is the listing electrical inspectors look for on cable tray in Canadian installations.

Aluminum keeps the weight down on wide tray, which matters on a 42 inch section that a two-man crew has to lift into hangers overhead. This bend weighs 9.002 lb. Aluminum also holds up in damp and corrosive environments without a coating to maintain. Steel is the choice where you need higher load capacity or where the specification calls for it.

Order your splice plates and hardware separately. The 4A-42-45VI24 is supplied as the bend fitting only, so plan on the correct B-Line splice connectors for your Series 2-5 aluminum tray at both ends, plus hangers or supports either side of the elevation change.

The manufacturer part number is 4A-42-45VI24 from Eaton B-Line. Read the code as 4 inch rail, 42 inch width, 45 degree vertical inside, 24 inch radius, which is a quick way to confirm you have the right fitting on a submittal.