B-Line Eaton series imperial cable tray and ladder, 4" Height, 66" Length, 36" Width, 36" and 12" Tray widths, Series 2-5 horizontal cross, Aluminum,

The 4A-36-12-HX12 is a Series 2-5 horizontal cross built for 36 inch and 12 inch tray widths, so it joins a 36 inch run crossing a 12 inch run at the same elevation. Main body width is 36 inches with a 4 inch loading depth. If both of your crossing runs are the same width, this is not the fitting you want.

It is a 12 inch radius fitting. That radius is what governs whether your cable's minimum bending radius is respected through the intersection, so check the cable manufacturer's minimum bend radius against 12 inches before you set the run. B-Line builds these crosses in other radii, so if your conductors need more, specify a larger radius version instead.

Allow 66 inches overall along the length, 36 inches across the width, and 4 inches of side rail depth. The 66 inch dimension comes from the 12 inch radius sweeps carrying the run out past the intersection, so plan your hanger and trapeze spacing to land clear of the fitting on both sides.

Aluminum. That matters for two reasons on a job: it keeps the fitting light for overhead work at 27.5 lb, and it should be matched to aluminum tray runs rather than mixed with galvanized steel where dissimilar metal contact and grounding continuity are a concern.

Order Eaton B-Line 4A-36-12-HX12. The code reads out as 4 inch depth aluminum, 36 and 12 inch tray widths, horizontal cross, 12 inch radius. That is the number to put on the submittal so the fitting matches the Series 2-5 tray it lands in.

Use a cross where four tray runs meet at one point on the same plane. A tee handles three. This B-Line fitting is a cross for a 36 inch run intersecting a 12 inch run, all at the same elevation with a 4 inch depth. If your runs change elevation at the junction, a horizontal fitting is the wrong family entirely.

It weighs 27.5 lb, which is manageable, but the piece spans 66 inches by 36 inches so its bulk, not its weight, is the issue. Two people and temporary support at both sweeps is the practical way to set it before bolting to the adjoining tray sections.