B-Line Eaton series imperial cable tray and ladder, 4" Height, 36" Length, 18" Width, Series 2-5 horizontal cross, Aluminum, 24" Radius

The fitting turns cable through a 24 inch inside radius, which is what protects large power conductors and fiber from being bent tighter than their minimum bend radius at the intersection. Pick the radius off your cable spec: if the largest cable in the run calls for more than 24 inches, you need a larger radius cross. If your cables are small and space is tight, a shorter radius fitting keeps the intersection smaller.

Plan for a 36 inch overall dimension on the fitting, with 18 inch wide by 4 inch deep legs and a 24 inch radius through the turn. That is a large footprint at the intersection, so check it against ducts, sprinkler mains, and structure before you set your hangers. It weighs 29.4 lb, so it is a two-person lift on a lift or ladder and needs support on each leg per your hanger spacing.

A horizontal cross is the right part where a run splits four ways in the same plane, one intersection, one fitting, four splice joints. Two tees back to back gets you the same geometry only if you have straight tray between them, and you end up with more splices and more support points. Use the cross where the branches leave the main run at the same point, and use tees where the branches are offset from each other along the run.

It is aluminum. That keeps the weight down (29.4 lb for a fitting this size) and gives you inherent corrosion resistance without a coating to chip, which is why aluminum tray is common in parking structures, water treatment, food plants and coastal buildings. Keep the whole run in one metal, aluminum fittings with aluminum tray, and use the matching hardware so you are not mixing dissimilar metals at the splice.

Order the splice connectors separately. B-Line cable tray fittings ship as the fitting body; the splice plates and hardware that join it to the adjoining tray sections are a separate line item, and they have to match the series and material, aluminum splice plates for this aluminum Series 2-5 tray. Count four connection points on a cross, so budget hardware for all four legs.

Part number 4A-18-HX24 from Eaton B-Line. Reading it back: 4 inch deep aluminum, 18 inch width, horizontal cross, 24 inch radius. If you are matching an existing run, that number is what should appear on your tray takeoff next to the intersection.

CE marked. If your submittal package or facility spec calls for a specific listing beyond that, check it against what the run as a whole needs, since tray systems are usually approved as an assembly with the correct splice hardware and bonding in place.