B-Line Eaton series imperial cable tray and ladder, 4" Height, 43.188" Length, 24" Width, Series 2-5 vertical inside bend, Aluminum, 90° Angle, 36" Ra

A vertical inside bend turns the tray run up or down with the fitting radius on the inside of the turn, so the cables ride on the concave side. Eaton B-Line model 4A-24-90VI36 is the 90 degree vertical inside bend for Series 2 through 5 aluminum tray, 24 inch width, 4 inch side rail height, with a 36 inch radius. Use an inside bend where the tray rises away from the cable load side of the turn; if the cables must bend over the convex side of the turn, that is a vertical outside bend fitting instead, and the two are not interchangeable.

Plan for the fitting's 43.188 inch overall length across the turn, driven by the 36 inch bend radius on a 90 degree change of direction. In a vertical riser that means roughly three and a half feet of clear run in each direction from the start of the bend before the next straight section, so check headroom, beams, and duct crossings at that elevation before committing to the 36 inch radius.

Bend radius is a cable-bending question, not a tray question. A 36 inch radius gives large power conductors and fiber the sweep they need to make the vertical turn without exceeding their minimum bending radius. Tighter radius fittings (12 or 24 inch) shorten the fitting and save space but restrict what cable you can pull through the turn. The 4A-24-90VI36 is the 36 inch radius version, 90 degrees.

The bend carries CSA certification, which is what an inspector in Canada will look for on tray and fittings. Note that certification applies to the fitting as supplied; grounding and bonding of the tray run is still done per the job's installation requirements.

Order the splice plates and bolt hardware separately. The 4A-24-90VI36 is the bend fitting itself, in aluminum, 24 inch width with 4 inch rails. Each end of the fitting needs a connector set matched to the Series 2 through 5 aluminum tray it joins, so count two splice sets per bend plus any expansion or adjustable connectors the riser design calls for.