B-Line Eaton series imperial cable tray and ladder, 6" Height, 24" Length, 18" Width, 18" and 24" Tray widths, Series 2-5 horizontal expanding tee, Al

The Eaton B-Line 6A-18-24-HT12 is an expanding horizontal tee, so it joins two different tray widths: 18 inch and 24 inch. That is what the "expanding" designation means here, and it is the reason to pick it over a straight-width tee when your run steps up or down in width at the branch.

It is a 12 inch radius fitting. Radius is the spec to check against your cable's minimum bending radius before you order, because the fitting sets how tightly the conductors turn at the branch. If your cable calls for more than 12 inches of bend radius, you need a larger radius tee instead of this one.

Yes. The 6A-18-24-HT12 is a 6 inch height fitting, so it matches 6 inch deep side rail tray. Tee height has to match the tray it bolts to, so confirm your run is 6 inch deep rather than 4 or 8 before ordering.

Aluminum. That keeps the fitting light for overhead work and suits it to the same aluminum tray run it bolts into. Mixing aluminum fittings into a steel tray system is not the way these are meant to be installed, and it invites galvanic issues at the splice plates.

It carries CSA certification, which is what an inspector in Canada will look for on a tray fitting. Worth noting on submittals for cross-border projects.

A horizontal tee like the 6A-18-24-HT12 gives you a three-way junction, one branch off a through run, all in the same horizontal plane. A cross gives four ways. Use the tee when cable leaves the main run in one direction only; use a cross when branches go both directions at the same point. The expanding part matters separately: this one steps between 18 inch and 24 inch tray, so it also handles the width change at the junction.

22.161 lb. Light enough for one electrician to set on a ladder, but at 24 inches long and 18 inches wide it is awkward to handle solo overhead, so plan support on both legs before you pull the sling.