buttress

arc buttress arch buttress arched buttress base thickness buttress base thickness of buttress buttress braces buttress bracing buttress dam buttress gear buttress gravity dams buttress screw thread buttress spacing buttress thread buttress up buttress wall cantilever buttress dam clear buttress spacing columnar buttress dam cutoff buttress deckless buttress dam diamond head buttress dam double wall buttress fixed buttress weir fixed slab buttress dam flat slab buttress dam flat-slab buttress dam flying buttress foot with buttress hanging buttress hollow buttress inner buttress internal buttress length of buttress massive head buttress dam multiple dome buttress dam mushroom head buttress dam round head buttress dam round-head buttress dam shouldered buttress single wall buttress slab and buttress dam truss buttress dam unit column method for buttress dam wall without buttress