Sign: Open, Ceiling Mount
CREATIVE: Requires no power and can be turned on/off when designing prefabs.
Harvest drops
Scrap Polymers× 2 @ 80%
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
Salvage drops
Electrical Parts× 2 @ 70%
Extra parts when salvaged with a wrench, ratchet or impact driver.
Drops when destroyed
Iron× 1-5
When it collapses
Falling, it leaves 
Scrap Metal Pile (75% of the time) where it lands.
Where to find (18 POIs)
Dishong Tower (tier 5), Ostrich Hotel (tier 5), Butcher Pete's (tier 4), Ballzstrike Bowling (tier 3), Jim & Tim's Bullets and Booze (tier 3), The Bear Den (tier 3), Town Square Apartments (tier 3), Aldos Cabinet (tier 2), P&B Machining (tier 2), Bob's Cafe (tier 1), Bobcats Bar (tier 1), MoPo-Shack (tier 1), Circuit Splits Station, Moda Bar, Nuke Burger, ParKing Lot, Pass-N-Gas Store #06, Urban Style Shops.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.