With sophisticated digital tools, design approaches have evolved, giving rise to innovative constructive practices despite multiple and significant constraints like manual manufacturing, raw material usage, and intricate morphologies. This article introduces a high-tech design process tailored to low-tech manufacturing, applied to a stone structure comprising mixed materials-cut stone and plaster. The structural design principle originates from Joseph Abeille's interlocking concept, facilitating the generation of a stone structure with low peripheral thrusts, emphasizing bending stress on individual stone blocks, and enabling centring-free manufacturing mainly guided by block contact surfaces.

To explore a broad morphological space, a key variation from Abeille's concept involves generating contact joints using "Triply Orthogonal Systems of Surfaces (TOS)". This new implementation rationalizes local block generation based on precise geometric constraints imposed by the soft limestone material's structural capacities, especially on block edges. The dynamic and interactive exploration of the structure's overall morphology, including surfaces with negative Gaussian curvature, is achieved through a geometrically constrained parametric design process. Not only does this process allow wide design space exploration, but it also ensures coherence among other rationalization constraints and parameters. Addressing complex questions during the preliminary design phase made it possible to establish the conditions for the simple and rapid manufacturing of a partial prototype of an interlocking hand-cut stone vault executed in four days by architecture students with stonemasonry trainees.