Semicircular Arch Diagram - Masonry Construction Principle #13534 (License: Personal Use)

This black-and-white schematic illustrates a Roman-style semicircular arch composed of evenly spaced voussoirs converging at a central keystone. A dashed radial line extends from the center point on the springing line to the intrados, demonstrating how each voussoir is cut along radii for structural integrity. The drawing emphasizes geometric precision essential in pre-modern load-bearing architecture.

Used in educational content about classical architecture, civil engineering fundamentals, or historical construction techniques; serves users seeking visual explanations of arch mechanics for academic or DIY restoration projects.