B-Line 4A-36-42-HT12 Eaton series imperial cable tray and ladder - Length 33 in, Width 36 in, Height 4 in - Aluminum

The 4A-36-42-HT12 is a Series 2-5 horizontal reducing tee built for 36 inch and 42 inch tray widths, so it takes a 42 inch run down to 36 inch at the branch point. Its own width dimension is 36 inches and it carries a 12 inch radius on the turn.

Allow for a fitting 33 inches long, 36 inches wide and 4 inches deep. The 12 inch radius sets the bend sweep, which is what governs the minimum cable bending radius through the branch, so the fitting cannot be shortened or field-trimmed to fit a tighter opening.

Aluminum keeps the weight down on hangers and trapeze supports, which matters on a fitting this size: the 4A-36-42-HT12 weighs 24.34 lb even in aluminum. It is also the corrosion-resistant choice for damp or outdoor runs without needing a coating. Mixing materials in one run is what to avoid, so if the existing tray is aluminum, stay aluminum at the fittings.

A horizontal reducing tee gives you a three-way branch in the horizontal plane and changes width at the same time, which is what the 4A-36-42-HT12 does between 36 and 42 inch tray. If you need a four-way junction, use a cross. If you only need to step the width down in a straight run with no branch, a straight reducer is the fitting, not this.

Order it as B-Line 4A-36-42-HT12. The number reads as 4 inch depth aluminum, 36 to 42 inch widths, horizontal tee, 12 inch radius, which is a useful check against the drawing before you release the order.

The 4A-36-42-HT12 is CE marked. That is the only certification carried on the record for this fitting.

Yes, plan for it. At 24.34 lb before any cable is laid in, a 36 inch wide aluminum tee concentrates load at the junction, so support the fitting on both the run side and the branch rather than cantilevering it off the straight section.