Factory Direct • Bulk Supply • GST Billing • Gujarat
GuideSizes chart
RCC manhole cover sizes chart
Use this guide to compare frame size, clear opening, and typical use cases for common RCC manhole cover sizes. Buyers often ask only for the top cover size, but correct selection depends on the full frame-and-opening relationship.
Understand the three main dimensions
Cover size
The visible top cover dimension that sits on the frame.
Frame size
The outer footprint of the full frame assembly placed over the chamber.
Clear opening
The usable inside opening for access, maintenance, and inspection.
| Common size | Typical opening need | Typical use case | Product link |
|---|---|---|---|
| 300 x 300 x 50 mm | Small access openings | Compact service chambers and light utility points | View size |
| 460 x 460 x 75 mm | Small to medium utility openings | Drainage and utility chambers with moderate access needs | View size |
| 500 x 500 x 100 mm | Medium chamber access | Residential and commercial inspection points | View size |
| 600 x 600 x 100 mm | Large access opening | Municipal, utility, and maintenance chambers | View size |
| 850 x 850 x 150 mm | Heavy-duty chamber access | Higher load or larger opening requirements | View size |
How to shortlist the right size
- Measure the existing chamber opening or required access opening.
- Confirm whether the chamber needs a square, rectangular, or round format.
- Check the traffic condition and match the load requirement.
- Confirm the frame footprint can sit properly on the chamber top.
- Review the exact variant page before ordering bulk quantity.
Common sizing mistakes
- • Ordering by visible cover size without checking clear opening.
- • Matching chamber width but ignoring frame seating area.
- • Choosing a size first and checking load class later.
- • Ignoring maintenance access requirements for workers and tools.