Assertion: buttress | /r/ObjectUse | used 20 ft
Facets:
Source sentences:
text: For a load-bearing brick wall more than 8 ft (2 m) high a buttress is used every 20 ft (6 m).
text: For a load-bearing brick wall more than 8 ft (2 m) high a buttress is used every 20 ft (6 m).
text: For a load-bearing brick wall more than 8 ft (2 m) high a buttress is used every 20 ft (6 m).