"intrados"の定義と意味

What is the "intrados"?

In architecture, the intrados refers to the inner curve or surface of an arch. It is the part of the arch that faces the interior space, contrasting with the outer curve known as the extrados. The intrados is important in both the structural integrity and aesthetic appearance of the arch, often featuring decorative elements that enhance the overall design. This surface can be made from materials such as stone or brick and plays a key role in how light and space are experienced within a building.