The Roman arch prevented stress entirely, holding the many masonry in compression, through the keystone for the piers. Stone in compression has fantastic toughness, and the Romans designed enormous arched bridges and aqueducts in big quantities. Extending their arch into a tunnel, they invented the barrel vault, with which they https://padlet.com/westhillsmasonryofficial/discussion-topic-goes-here-uxrhpxb34ohfjmjq/wish/3018777750