If you resort to physical force to break open a chest or door, you need to follow the rules in the BREAKING THINGS section. It will be necessary to know what type of chest or door you're trying to break (you don't really need to check here if you don't try to break it up).
1d20 Roll | Door Type | Description |
1-10 | Door-1 | Wooden Door |
11-15 | Door-2 | Reinforced Door |
16-18 | Door-3 | Metal Door |
19-20 | Door-4 | Stone Door |
1d20 Roll | Chest Type | Description |
1-4 | Chest-1 | Wooden Crate |
5-12 | Chest-2 | Wooden Chest |
13-14 | Chest-3 | Iron-Bound Chest |
15-16 | Chest-4 | Strong Box |
17-18 | Chest-5 | Stone Coffer or Trunk |
19-20 | Chest-6 | Iron Strong Chest |