Assertion: base floor | /r/HasProperty | supported over lower slab
Facets:
value: usually
type: TEMPORAL
value: by a plurality of steel stanchions
type: OTHER
Source sentences:
text: Usually, the base floor 12 of a room for installing precision machines or vibrating devices is supported over a lower slab 40, which is integral with the building or other construction, by a plurality of steel stanchions 42.