Concrete Floor Trapdoor

==Description==
The strongest and most durable structures on Icarus. If a prospector wishes to have a permanent outpost, without worry of structural damage from wind/rain/fire/bears, concrete is the only choice.
==Crafting==
 is crafted in the Machining Bench with the following resources:
Amount	Resource
10 	
4 	
4 	
Category:Building Pieces
Category:Concrete Building Pieces