Decor and furniture
Sign Decal Corrugated Metal 3x3
It's a sign. You write things on it.
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 (14 POIs)
Champions Coliseum (tier 5), Navezgane County Jail (tier 5), NFD Downtown HQ (tier 4), Law & Order Square (tier 3), Navezgane Falls Diner (tier 3), Navezgane Fire District #3 (tier 3), Maggie's Corner Cafe (tier 2), My Spot Parking (tier 2), NFD Engine 4 (tier 2), The Animal Hoarder (tier 2), Century Outlet (tier 1), Dick's Diner (tier 1), 3rd Eye Optometry, Lawless Station.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.