Assertion: buttress | /r/HasProperty | arched structure
Facets:
Source sentences:
text: The flying buttress (arc-boutant, arch buttress) is a specific form of buttress composed of an arched structure that extends from the upper portion of a wall to a pier of great mass, in order to convey to the ground the lateral forces that push a wall outwards, which are forces that arise from vaulted ceilings of stone and from wind-loading on roofs.