| Description of building | Building construction type |
|---|---|
| Brick-built surrounded by a mound of earth or other suitable material | Brick-built mounded |
| Concrete-built surrounded by a mound of earth or other suitable material. Brick-built mounded | Brick-built mounded |
| Brick-built, not mounded | Brick-built unmounded |
| Concrete-built, not mounded | Brick-built unmounded |
| Steel-built store, with or without attached detonator annex, surrounded by a mound of earth or other suitable material | Metal-built mounded |
| Steel-built store, without attached detonator annex (or attached detonator annex not used), not mounded | Metal-built unmounded – no detonator annex attached |
| Steel-built store, with attached detonator annex, not mounded | Metal-built unmounded building – with a detonator annex attached |
| Wooden-built, surrounded by a mound of earth or other suitable material | Metal-built mounded |
| Wooden-built, not mounded | Metal-built unmounded – no detonator annex attached |
| Unit risk construction process building, lightweight front and roof, not mounded | Metal-built unmounded – no detonator annex attached |
| Unit risk construction process building, lightweight front and roof, surrounded by a mound of earth or other suitable material | Metal-built mounded |
| Steel-framed warehouse-type building having roof of lightweight sheeting and walls entirely of lightweight sheeting, unmounded | Metal-built unmounded – no detonator annex attached |
| Steel-framed warehouse-type building having roof of lightweight sheeting and walls entirely of lightweight sheeting, any brick construction being no more than one metre high | Metal-built unmounded – no detonator annex attached |
| Steel-framed warehouse as above, but having brick-built construction more than one metre high | Brick-built unmounded |
| Earth over-mounded building of brick or concrete construction | Metal-built mounded |
| Steel/concrete/steel sandwich hardened construction | Metal-built unmounded – no detonator annex attached |
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