B-Line CABLE SUPPORT FITTING, SERIES 2,3,4&5, 3" / 4" HEIGHT, 36" WIDTH, 48" RADIUS, ALUMINUM

It's a cable support fitting for B-Line cable tray runs, built for 36 inch wide tray with a 48 inch radius and a 4 inch loading depth (3 inch NEMA). Aluminum construction. It supports cable through a curved section of the run rather than carrying a straight length of tray.

This fitting is made for B-Line Series 2, 3, 4 and 5 cable tray. If your run is one of those series and it's 36 inch nominal width, it lines up. Tray from another series or another manufacturer's width standard is not covered by the part.

48 inches is the tray bend radius the fitting is built to follow. Cable tray radius fittings are ordered to match the radius of the horizontal or vertical bend in the run, and 48 inch is the largest of the common B-Line radius sizes. If your elbows and bends were specified at 24 or 36 inch radius, this fitting won't follow the curve correctly.

Order it as B-Line 4A-36-CSF48. That single MPN covers the 3 inch NEMA / 4 inch height, 36 inch width, 48 inch radius aluminum configuration, and there are no further options to specify.

Aluminum is the lighter option and is the usual pick for corrosion-prone environments and long spans where weight on the supports matters. The 4A-36-CSF48 is aluminum throughout. Where you need higher mechanical strength or you're matching an existing hot-dip galvanized steel run, a steel fitting of the same series and width is the better match, since mixing metals across a bonded tray run is something most electrical contractors avoid.

B-Line publishes a spec sheet for the 4A-36-CSF48 that carries the dimensional detail for the fitting. It's linked directly from the product information, so you can pull it for submittals or to check the fitting against your tray layout before ordering.