Bandit Wall, Corrugated, 1x2.5
While not as sturdy as solid concrete, iron constructions have high structural integrity, requiring fewer support pillars.
Harvest drops
Iron× 17
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 (29 POIs)
Haven Hotel (tier 5), Beanthere Coffee Company (tier 4), ChemTech Distribution Center (tier 4), Close Encounters Gun Range (tier 4), Green Hill (tier 4), Bill Gearz Place (tier 3), Fortified Farm (tier 3), Ranger Station Alpha (tier 3), Soyer Family Farm (tier 3), Bart's Salvage (tier 2), Don Diego Estate (tier 2), Our Best Moments (tier 2), The Animal Hoarder (tier 2), The Johansen Residence (tier 2), The Wagner Residence (tier 2), Camp Carwhal (tier 1), Caravan Carousel (tier 1), Hook, Line, & Sinker (tier 1), Mercy Point Camp (tier 1), Pass-N-Gas Store #07 (tier 1), John & Sons Construction, Navezgane Outlets, Philip Powers Residence, The Shed, Trader Bob, Trader Jen, Trader Joel, Trader Rekt, Treehouse Treasures.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.