Order of work
Framed grating is a two-stage install: the frame goes into the slab first and is anchored and levelled, then the cover is fitted. Rushing the frame stage is the usual cause of a cover that will not sit flat.
Installation steps
- Set the frame: position it in the opening at the correct finished level.
- Level and align: check level along the length and across the width.
- Anchor it: fix to the slab or to anchors as specified.
- Grout or bed: fill around the frame so load transfers into the concrete.
- Let it cure: do not load the frame before the bedding has set.
- Fit the cover: seat the cover and check the fit and clearance.
Levelling detail
- Set the frame top flush with the finished floor, not proud of it.
- Follow the designed fall where the surface is graded.
- Check level in both directions before anchoring fully.
- A proud frame is a trip edge; a low frame collects water and debris.
Cover fit and clearance
- Confirm the cover seats fully on the frame, not on debris or high spots.
- Check the cover-to-frame gap is even and small enough to avoid rattle.
- Allow for coating thickness on galvanized work.
- Check any hinge or lock operates freely after installation.
Final checks
- No rocking when walked or driven over.
- No gap between frame and surrounding floor.
- Cover lifts for access as intended, using the provided handles or keys.
- All fixings present and tight.
Installing Framed Grating FAQ
Can I fit the cover the same day?
Only after the frame is anchored and the bedding has set; loading too early is a common fault.
The cover rocks—why?
Usually an unlevel frame, debris on the seating, or insufficient bearing.
Does galvanizing affect the fit?
Yes. Allow for coating thickness when checking the cover-to-frame clearance.
