Grave-opening dimensions should be calculated from the actual burial construction rather than from one universal “standard” number. The coffin, urn or ossuary, working clearance, internal wall or chamber, soil, groundwater, cemetery rules and safe excavation conditions all affect the required opening.
What should be measured first?
- Measure the actual coffin, urn or ossuary.
- Define the required working clearance for lowering and installation.
- Add the thickness of the internal chamber, masonry or other approved construction.
- Check soil stability, groundwater and drainage.
- Check cemetery or local site rules.
- Only then finalize the excavation and finished memorial dimensions.
Grave opening, internal chamber and finished memorial are different
| Dimension | Purpose |
|---|---|
| Grave opening | Excavated area below ground. |
| Internal chamber / kim tĩnh | Built or prepared space that receives the burial container. |
| Finished memorial footprint | Visible memorial above ground, including base and projecting components. |
Why KANNO does not publish one universal size
Coffin dimensions, burial customs, soil and cemetery regulations differ. A dimension copied from another grave can be unsuitable for the actual site. Where exact engineering or excavation safety is involved, the responsible site professional and cemetery requirements should govern the work.
Traditional references
Some families compare feasible dimensions with a Lỗ Ban ruler. This is a cultural reference only. Establish the technical range first, then review traditional intervals if desired.
Frequently Asked Questions
No. The opening should be derived from the actual burial container, construction, working clearance, ground conditions and cemetery rules.
No. They are related but separate dimensions.
No. Soil, groundwater, cemetery requirements and safe construction conditions need to be considered first.
