Cable tray profiles: U-shape, returned flange and snap-on explained
Not every cable tray has the same profile. Learn the difference between U-shape, returned flange and snap-on trays, which one suits your project, and how it affects the cover, weight and price.
When you order cable tray, width × height and thickness are not enough. You also need to specify the side profile, because it affects the tray's strength, how the cover fits, and the price.
1. U-shape (plain side)
The side rises straight at 90° with no return at the top.
- Pros: simplest and cheapest profile, easy to cut and install on site.
- Cons: sharper top edge, and weaker than the other profiles in large sizes.
- Best for: small and medium sizes and indoor routes.
2. Returned flange
The top of each side is bent inwards by about 10 mm.
- Pros: the return stiffens the side and protects cable insulation from the sharp edge during pulling.
- Best for: large sizes, long spans, and consultant-supervised projects.
3. Snap-on
Each side has a special bend of about 15 mm designed so the cover snaps on without screws.
- Pros: covers fit and come off quickly, with no loose screws.
- Best for: fully covered routes that need frequent maintenance — factories, hospitals, electrical rooms.
Covers for each profile
| Tray profile | Cover side |
|---|---|
| U-shape | about 15 mm, fixed with screws or clips |
| Returned flange | about 15 mm |
| Snap-on | about 25 mm, snaps onto the tray |
Effect on weight and price
The extra bend on returned-flange and snap-on trays adds to the developed width of steel in each metre, so weight and price are slightly higher than a U-shape tray of the same size. The difference is small on wide trays and more noticeable on narrow ones.
Put the profile in your enquiry
For an accurate quotation send us: width × height × thickness + profile + finish. Example: *300 × 100 mm, 1.5 mm, returned flange, hot-dip galvanized*.
See our cable tray products or request a quote.