Fences
Log Wall Pillar Cap 02
A wood block with 200 hit points.
Harvest drops
Wood× 8
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 (5 POIs)
Fortified Farm (tier 3), Cautious Campers, Rotten Cavern, Trader Hugh, Trader Joel.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.