Upgrade path

Wooden Ladder→ 5× Forged Iron →Iron Ladder→ 5× Forged Steel →Steel Ladder

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

Crafting

Craft at Workbench · makes 1

Harvest drops

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

Where to find (43 POIs)

Dishong Tower (tier 5), Shamway Factory (tier 5), Two Bit Tower (tier 5), Close Encounters Gun Range (tier 4), Don Vittorio Spagetto Residence (tier 4), Navezgane High School (tier 4), Pergola Apartments (tier 4), Super Shamway (tier 4), The Wright Residence (tier 4), Town Hall (tier 4), Wasted Stiff's (tier 4), Johnnytown (tier 3), Super Savage Country (tier 3), The Bear Den (tier 3), Boar Barn Fields (tier 2), Collision Center (tier 2), Navezgane Creamery (tier 2), Red Ruby's (tier 2), Shamway (tier 2), The "Broken Dreams" house (tier 2), The Bennett Residence (tier 2), The Brown Residence (tier 2), The Haug Residence (tier 2), The Philippe Residence (tier 2), The Sinkhole House (tier 2), Bear-N-Land Coal Mining (tier 1), Pass-N-Gas Store #08 (tier 1), The Eisele Residence (tier 1), The Powell Residence (tier 1), Busted Industrial Tank, Clunky Oil, Clunky Oil Station, Country Crack-a-Book, Decimated EZ-Chem Depot, Deserted Working Stiff Tools, Destroyed Industrial Tank, EZ-Chem Depot, Industrial Tank #1, Pop-N-Pills Urgent Care, Ransacked Shotgun Messiah and 3 more.

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