B-Line Eaton series imperial cable tray and ladder, 6" Height, 57.188" Length, 36" Width, Series 2-5 vertical inside bend, Aluminum, 90° Angle, 48" Ra

A vertical inside bend turns the tray run upward or downward while keeping the cables on the inside of the curve. The B-Line 6A-36-90VI48 makes that turn at 90 degrees on a 48 inch radius, so cables keep a generous bend radius through the elevation change rather than being forced over a sharp corner. If your run needs to turn the other way, with the cables on the outside of the curve, you want a vertical outside bend instead, not this fitting.

Weight and corrosion. This 36 inch wide, 48 inch radius bend weighs 28.408 lb in aluminum, which is light enough for a two-man overhead set without rigging, and aluminum holds up well in damp or corrosive environments without a coating to maintain. Steel tray is the usual pick where higher load capacity or lower cost per foot drives the spec. Mixing materials in one run is possible but adds a bonding and galvanic corrosion detail you have to handle.

A 48 inch radius is the largest of the common cable tray bend radii and is chosen specifically for heavy or stiff conductors, like large medium-voltage power cable or armored feeders, whose minimum bending radius would be violated by a 12 or 24 inch radius fitting. Check the cable manufacturer's minimum bend radius against the 48 inches on this fitting; if it fits, this bend will carry it through the vertical turn without kinking the jacket.

Order B-Line (Eaton) part number 6A-36-90VI48. The number decodes to the fitting: 6 inch rail height, aluminum, 36 inch width, 90 degree vertical inside bend, 48 inch radius. Anyone matching a submittal or reordering to match an existing run should be quoting that full string, since changing any one of those figures changes the part.

The 6A-36-90VI48 is supplied as the bend fitting itself. Splice plates, connection hardware, and any hanger or trapeze supports for the fitting are ordered separately and need to match the Series 2 through 5 aluminum tray you are connecting to. Plan on a support near each end of the bend, since a 57.188 inch fitting spanning a vertical transition should not be left hanging off the adjoining straight sections alone.