Helpers
Bar Stool
Put the crafted block on your hotbar, hold Reload and select the Shape entry from the radial menu. Click or Shift-Click to select a variant to build with.
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.