Three-Centred Arch, 1.2m/4 ft Span – 1:10 Scale Model

This is a 3D printable model of a three-centred masonry arch based on a 1.2 m (4 ft) span, scaled down to 1:10.

The arch is made of 7 stones in a course-based arrangement. The cuts along the arch are distributed at equal distances, giving a balanced and regular layout across the curve. The model is designed as a small architectural and educational piece that shows the geometry of a three-centred arch in a clear physical form.

It can be useful as a display model, a teaching aid, or a reference piece for anyone interested in arches, masonry, stonework, or architectural geometry.