Definition

Noun: A segmental arch is a type of architectural arch. Its defining characteristic is that its curve is an arc of a circle that is less than a semicircle. This makes it a shallow or low-rise arch compared to a semicircular arch.

Usage

The term is used specifically in architecture, engineering, and construction to describe the shape of an arch. * The bridge was supported by a series of segmental arches. * Roman aqueducts often employed the segmental arch for its structural efficiency. * The design called for a segmental arch over the window to reduce the overall height.

Advanced Usage

• Structural Property: A key advantage of the segmental arch is that it exerts less lateral thrust on its supporting abutments than a semicircular arch of the same span, allowing for lighter supporting structures.
• Historical Context: While used in ancient architecture, the segmental arch was more fully developed and widely adopted during the Renaissance.

Variants and Related Words

• Arch (n): A curved symmetrical structure spanning an opening and typically supporting the weight above it.
• Semicircular Arch (n): An arch whose curve is exactly half of a circle.
• Flat Arch (n): A very shallow arch, sometimes considered a specific type of segmental arch with an extremely low rise.

Synonyms

• Shallow arch
• Low-rise arch

Antonyms

• Semicircular arch
• Pointed arch (e.g., Gothic arch)

Noun

1. a shallow arch; an arch that is less than a semicircle