Ceci n’est pas une poutre – Computational Design and Geometry Representation for Reclaimed Building Elements

A point cloud of a reclaimed beam is not the beam. Neither is the tidy cuboid your BIM model swapped it for. Both are notations, and notations are never innocent. They decide, quietly and in advance, which questions you can ask and what operations you can perform. A beam represented simply as a length value and assignment algorithms become trivial while its connections vanish. Keep the full scan, and you have everything except the ability to operate on it. Every representation is a bet about what will matter later, placed before you even know the game.

CAD and BIM were built for an era of industrialization, where all parts were identical. Reclaimed parts are warped, drilled, charred, half-known, and stubbornly singular. The mismatch is not a bug in the software. It sits in the notation.

Together, we want to zoom out, take a step back, and develop ideas about which notations or computational design models would be better suited to a world where existing buildings become resources again. Three hours, a few real beams, paper, tape measures, and calipers. We will try to describe them, watch the descriptions fail, and map together where current practice runs out of vocabulary.