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| Category | Failure factors | Core key factors | Scenario problem characteristics |
|
| People | A1 work in violation of regulations | | |
| A2 no protective measures | | |
| A3 safety education in form | | |
| A4 defective site management | | F1 no safety belt |
| A5 weak safety awareness | | F2 no protective measures |
| A6 construction without license | | F3 no edge protection |
| A7 inadequate supervision | AB1 work in violation of regulations | F4 material damage |
| A8 blind command, organization construction | AB2 no protective measures | F5 violation of regulations |
| | AB3 management is not in place | F6 management is not in place |
| | AB4 not hanging safety belt | F7 weak safety consciousness |
| | AB5 safety awareness is weak | |
|
| Object | B1 not hanging safety belt | | |
| B2 wire rope breakage | | |
| B3 destabilization | | |
| B4 no protection near the edge | | |
| B5 no horizontal protection net | | |
| B6 unqualified scaffolding material | | |
| B7 no shelter at the hole | | |
| B8 overload of unloading platform | | |
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