Building and construction type and the use of separation distance tables
Explosives: update
The UK has left the EU, and some rules and procedures have changed from 1 January 2021.
| Explosives building | Hazard type present | Table* |
|---|---|---|
| Brick-built mounded building | Hazard Type 1 | Table 1 |
| Brick-built unmounded building | Hazard Type 1 | Table 2 |
| Metal-built mounded building without detonator annex | Hazard Type 1 | Table 3 |
| Metal-built unmounded building without attached detonator annex | Hazard Type 1 | Table 4 |
| Metal-built unmounded building with detonator annex | Hazard Type 1 | Table 5 |
| Building of any construction: Some or all items being of more than 0.7kg net mass in a mounded store | Hazard Type 2 | Table 6 |
| Building of any construction: Some or all items being of more than 0.7kg net mass in an unmounded store | Hazard Type 2 | Table 7 |
| Building of any construction: Every item being of 0.7kg net mass or less in a mounded store | Hazard Type 2 | Table 8 |
| Building of any construction: Every item being of 0.7kg net mass or less in an unmounded store | Hazard Type 2 | Table 9 |
| Building of any construction | Hazard Type 3 | Table 10 |
| Building of any construction | Hazard Type 4 | Table 11 |
* Tables - Guidance on Explosive Regulations 2014 lists all the tables referenced above.
Where a building contains more than one hazard type
Where a building contains a mixture of Hazard Types 1, 3 or 4, add the quantities of the various hazard types together and treat as the lowest numbered hazard type for example treat 20 kg of Hazard Type 1 plus 30 kg of Hazard Type 3 as 50 kg of Hazard Type 1.
Where a building contains a mixture of Hazard Types 2, 3 or 4, add the quantities of the various types together and treat as the lowest numbered hazard. For example, treat 50 kg of Hazard Type 2 and 50 kg of Hazard Type 4 as 100 kg of Hazard Type 2.
Where a building contains a mixture which includes Hazard Type 1 and 2 with or without other hazard types, add the quantities of the various hazard types together and treat as Hazard Type 1 or Hazard Type 2, whichever requires the larger separation distance.
Further information
- Information on building construction types is available.
- Information and examples of occupied, and unoccupied buildings is available.