Doors and hatches
Blue Trailer Door
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.
Where to find (12 POIs)
Area 7 (tier 5), Ecotrash Recycling Center (tier 4), Fiery Farms (tier 3), NC Bus Repair Site (tier 2), Ranger Station Echo (tier 2), The Sinkhole House (tier 2), Caravan Carousel (tier 1), Car Impound Lot, Ice Factory, Infested Construction Site, Mario Piper, Meridian Center.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.