Doors and hatches
Purple Trailer Door, No Window
Press & hold Activate to lock it or set a combination. Repair with a construction tool using the secondary action.
Harvest drops
Iron× 5-10
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
Drops when destroyed
- Iron× 10
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.