subbasements
Floors beneath basements
Subbasements are basement levels below the main basement of a building.
Large structures like hospitals, hotels, and skyscrapers often have multiple underground floors for mechanical systems, storage, or parking: The boiler room is in the subbasement.
The prefix sub- indicates a position beneath what is already beneath ground level.
Below ground or countercultural
- foundationUnderlying support structure
- cellarUnderground storage room
- excavationAct of unearthing
- footingsStructural foundation supports
concrete · structural · multilevel · crawlspace · bedrock · waterproofing · slab · load-bearing
Secure storage chamber
- archiveStored historical records
- warehouseBulk goods storage building
- inventoryCatalog of held assets
- shelvingHorizontal storage surfaces
climate-controlled · safe-deposit · catacombs · bunker · stockpile · repository · strongroom
Reinforced subterranean stronghold
- reinforcedMade more resistant
- survivalRemaining alive against odds
- emergencySerious sudden danger
- hardenedMade tough or unfeeling
Indoor climate management
- plumbingWater and waste infrastructure
- chillersWorks designed to frighten
- generatorsDevices converting motion to electricity
- switchgearCircuit control equipment
pipes · ductwork · pumps · ventilation · maintenance · transformer · meters · infrastructure
underground
Below ground or countercultural
- foundationUnderlying support structure
- cellarUnderground storage room
- excavationAct of unearthing
footings · concrete · structural · multilevel · crawlspace · bedrock · waterproofing · slab · load-bearing · high-rise
vault
Secure storage chamber
shelving · climate-controlled · safe-deposit · catacombs · bunker · stockpile · repository · strongroom
bunker
Reinforced subterranean stronghold
- reinforcedMade more resistant
- survivalRemaining alive against odds
- emergencySerious sudden danger
HVAC
Indoor climate management
- plumbingWater and waste infrastructure
- chillersWorks designed to frighten
- generatorsDevices converting motion to electricity
switchgear · pipes · ductwork · pumps · ventilation · maintenance · transformer · meters · infrastructure
subbasementspenthouses
Top-floor luxury dwellings
upper stories · rooftops · attics · lofts · observation decks
subbasementsground level
Surface elevation plane
ground floor · ground floors · street level · grade level · first floors