Loot containers
Freezer Groceries Middle Empty Open
If food would ever spoil then it would be a good idea to keep it in here.
Salvage drops
Electrical Parts× 1-5
Short Iron Pipe× 1-2
Extra parts when salvaged with a wrench, ratchet or impact driver.
Drops when destroyed
Iron× 1-15
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.
Where to find (7 POIs)
NDC Checkpoint Three (tier 4), ParKing Garage #2 (tier 4), Super Shamway (tier 4), Buy-N-Go Grocery (tier 3), Pop-N-Pills (tier 3), Pass-N-Gas Store #10 (tier 1), BRR Ice Cream.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.