Floor

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ID	Level 1 (L1)	ID	Level 2 (L2)	ID	Level 3 (L3)
	Floor material		Floor type		Floor connections
Attribute _Type_Code	FLOOR_MAT		FLOOR_TYPE		FLOOR_CONN
FN	No elevated or suspended floor	FNO	No elevated or suspended floor
F99	Floor material, unknown			FWC99	Floor-wall diaphragm connection unknown
FM	Masonry			FWCN	Floor-wall diaphragm connection not provided
		FM99	Masonry, unknown	FWCP	Floor-wall diaphragm connection present
		FM1	Vaulted masonry
		FM2	Shallow-arched masonry
		FM3	Composite cast-in-place reinforced concrete and masonry floor system
FE	Earthen
		FE99	Earthen, unknown
FC	Concrete
		FC99	Concrete, unknown
		FC1	Cast-in-place beamless reinforced concrete floor
		FC2	Cast-in-place beam-supported reinforced concrete floor
		FC3	Precast concrete floor with reinforced concrete topping
		FC4	Precast concrete floor without reinforced concrete topping
FME	Metal
		FME99	Metal, unknown
		FME1	Metal beams, trusses or joists supporting light flooring
		FME2	Metal beams supporting precast concrete slabs
		FME3	Composite steel deck and concrete slab
FW	Wood
		FW99	Wood, unknown
		FW1	Wooden beams or trusses and joists supporting light flooring
		FW2	Wooden beams or trusses and joists supporting heavy flooring
		FW3	Wood-based sheets on joists or beams
		FW4	Plywood panels or other light-weight panels for floor
FO	Floor material, other

GEM Building Taxonomy