Domestic bathrooms need only a light-duty rating — foot traffic. Commercial bathrooms, accessible showers, kitchens and external areas may need a higher load class depending on what will pass over the grate. Load class is normally stated in the product specification.
What influences the required rating
| Traffic over the drain | Typical requirement |
|---|---|
| Barefoot foot traffic (domestic shower) | Light duty — standard residential grate |
| Shoes, cleaning equipment (commercial bathroom) | Standard commercial grate |
| Wheelchair traffic (accessible shower) | Grate rated for wheel loads, securely fixed |
| Trolleys, wheeled equipment (kitchens, plant rooms) | Heavier commercial class |
| Vehicles (driveways, car parks) | Vehicular-rated trench drain — not a bathroom product |
Why it matters more than it looks
A grate that deflects under load will:
- Rock in its frame and wear the seating surfaces
- Break the tile edge around the frame
- Potentially lift or move, creating a trip hazard in an accessible bathroom
- Crack at the slot pattern and eventually fail
In accessible bathrooms this is not only a durability issue — a moving or deflecting grate is a safety issue.
Practical specification points
- Confirm the load class against the expected traffic, not just the room type.
- Check how the grate is fixed — a grate that sits loose in the frame is more prone to movement.
- For accessible projects, confirm the fixing method as well as the load rating with the specifier.
- In commercial kitchens and plant rooms, check chemical resistance alongside load.
Tell us the application and expected traffic and we will confirm the appropriate specification. Request a Quote