That allows the arch to bear weight. An arch comprises three components: the springer, the voussoir and the keystone or headstone. Because of its central and prominent position, a keystone often ...

With over 12,000 definitions accompanied by more than 1,300 charts, tables, and graphs, the clear and concise presentation of this dictionary will easily clarify often confusing concepts and correct ...

Le béton est d’abord injecté dans un moule en forme de voussoir. A première vue, le vallon du Courtineau, site pittoresque qui entaille le paysage sur l'A 10 au sud de Tours (Indre-et-Loire ...