Segmental arches are arches with an arc less than a 180-degree Roman arch. They seem to have been popular primarily in the 1700s and 1800s, although they were occasionally built in medieval times — rarely even by the Romans. What is a Segmental Arch Bridge? The term "segmental arch" is rather a loose; technically anything less than a 180-degree segment of a circle is a segmental arch. However, historically many bridges have been built that while technically segmental arches are so … [Read more...] about Segmental Arches