Doors and hatches
Yellow Iron Garage Door 3x2
Press & hold Activate to lock it or set a combination. Upgrade & repair with a construction tool using the secondary action.
Crafting
Craft at Workbench · makes 1
Crafted as Iron Garage Door 3x2: pick this one of its variants when you place it.
Forged Iron× 20
Spring× 20
Mechanical Parts× 20
Harvest drops
Iron× 100
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.
Where to find (3 POIs)
Shotgun Messiah Factory (tier 5), Camp Hollow Point (tier 4), Ranger Station Echo (tier 2).
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.