Glossary · S
Step rings
The series of stepped rings of masonry or concrete on the outside of the Pantheon’s dome, loading its haunches where the dome would otherwise tend to crack and spread.
See also: Dome
Where it appears in the book
In the chapters Domes.
Nearby in the glossary
Springing · Squinch · Steel frame · Stela · Stilted arch · Stoa · Stomion · Stretcher