Upgrade path

Wood Door, No Honk→ 1× Iron Door →Iron Door→ 1× Steel Door →Steel Door

Hit a placed block with a stone axe, claw hammer or nail gun while carrying the material of the next step: 5 hits per upgrade.

Harvest drops

Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.

When it collapses

Falling, it leaves Wood Debris (Terrain) (75% of the time) where it lands.

Where to find (3 POIs)

Trader Hugh, Trader Joel, Trader Rekt.

Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.