Brenner, Matthias, Louis Vandenabeele, and Silke Langenberg, «The Potential of Reverse Engineering and Digital Fabrication for the Repair of High-Tech Architecture», 29th CIPA Symposium “Documenting, Understanding, Preserving Cultural Heritage: Humanities and Digital Technologies for Shaping the Future”, in: Int. Arch. Phogramm. Remote Sens. Spatial Inf. Sci., XLVIII-M-2-2023, 2023, pp. 303–309, https://doi.org/10.5194/isprs-archives-XLVIII-M-2-2023-303-2023.
Novel façade constructions and innovative load-bearing structures of the second half of the 20th century pose new challenges for maintenance and repair. The use of advanced technology, especially in High-Tech architecture, calls for the development of specific repair methods adapted to specific building materials and construction techniques. The conservation of these aging facades, often composed of custom-made metal components, requires the production of intricate spare parts to avoid unduly replacements. Digital fabrication presents a possible solution as it allows for the resource-efficient production of complex and non-planar geometries in small numbers while remaining cost-effective. The paper explores the use of photogrammetry and laser scanning to reverse engineer spare parts, as original plans are often missing or incomplete. A complete workflow for the fabrication of bespoke metal components is described using two examples of Swiss High-Tech architecture featuring challenging structural nodes and planar aluminum panels. Finally, the feasibility of remanufacturing spare parts is demonstrated with 3d-printed models.