| W20 | Struck by thrown, projected or falling object |
| | Struck by falling object in cave-in |
| | …… initial encounter, initial encounter |
| | …… initial encounter, initial encounter, subsequent encounter |
| | …… initial encounter, initial encounter, sequela |
| | Struck by object due to collapse of building |
| | …… initial encounter, initial encounter |
| | …… initial encounter, initial encounter, subsequent encounter |
| | …… initial encounter, initial encounter, sequela |
| | Other cause of strike by thrown, projected or falling object |
| | …… initial encounter, initial encounter |
| | …… initial encounter, initial encounter, subsequent encounter |
| | …… initial encounter, initial encounter, sequela |
