Doors and hatches
Metal Catwalk Bent, Trap, 2 Rails
A false floor or trap that will disintegrate when stepped on.
Upgrade path
Hit a placed block with a stone axe, claw hammer or nail gun while carrying the material of the next step: 4 hits per upgrade.
Harvest drops
Iron× 10
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
When it collapses
Falling, it leaves
Scrap Metal Pile (60% of the time) where it lands.
Where to find (7 POIs)
Don Vittorio Spagetto Residence (tier 4), Flushing Rule Palace (tier 4), HSP Logistics (tier 4), Downtown Apartments (tier 3), Ranger Station Alpha (tier 3), Oreally Auto (tier 2), P&B Machining (tier 2).
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.