Doors and hatches
Roll Up Security Gate 4x3, Diagonal
A metal block with 30,000 hit points.
Harvest drops
Iron× 1000
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
Drops when destroyed
Spring× 8-12
Mechanical Parts× 8-12
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.
Where to find (9 POIs)
7 Days Suites (tier 5), Area 7 (tier 5), Correa Rockworx (tier 5), Diamond's Mens Club (tier 4), Downtown Marketplace (tier 4), Super Savage Country (tier 3), Booze Vault, Friendszone Sports Center, Urban Style Shops.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.