01-27-2009, 12:52 PM
I just googled "Roman Arches" in Google Images. They all have keystones.
We use keystone bricks here at work all the time. They are not triangular because the forces exerted on them from the arch sides will pop the triangle up and out - collapsing the arch. It's an engineering thing. I don't know if the Romans discovered keystones or appropriated them from someone else. They are a very important architectural/engineering principle.
We use keystone bricks here at work all the time. They are not triangular because the forces exerted on them from the arch sides will pop the triangle up and out - collapsing the arch. It's an engineering thing. I don't know if the Romans discovered keystones or appropriated them from someone else. They are a very important architectural/engineering principle.
Cheryl Boeckmann
