B-Line Eaton series imperial cable tray and ladder, 4" Height, 78" Length, 24" Width, 24" and 18" Tray widths, Series 2-5 horizontal cross, Aluminum,

Model 4A-24-18-HX24 is built for two tray widths at once: 24 inch runs on one axis and 18 inch runs on the other. If all four legs of your intersection are the same width, this is the wrong fitting for the job.

Plan for 78 inches of overall length and 24 inches of width in the fitting's footprint, with 4 inches of depth. On a 24 inch radius cross that length comes from the sweeping turnouts on each leg, so it eats considerably more ceiling space than a square-cut cross.

It carries CSA certification, so it can be specified on projects in Canada that require CSA certified cable tray components.

This cross is aluminum, which is the usual pick where weight and corrosion resistance matter more than raw load capacity, including outdoor and damp industrial runs. It also keeps the fitting light enough for one installer to handle at 30.91 lb. Where you need maximum load or a fire-pump style heavy duty run, a steel tray system is the alternative, but do not mix aluminum and steel in the same grounded run without addressing dissimilar metal contact.

A horizontal cross is for a four-way intersection, where tray continues in all four directions on the same plane. If only three legs meet, use a horizontal tee instead. If the run changes elevation, that is a vertical inside or outside bend, not this part.

The Eaton B-Line part number is 4A-24-18-HX24. Read it as 4 inch aluminum, 24 inch and 18 inch tray widths, horizontal cross, 24 inch radius.

It weighs 30.91 lb bare. Add that to your cable fill when you space the trapeze supports around the intersection, since a four-way crossing concentrates load at one point in the run.