Why The Arch

The Department of Structural Feeling has published six books. This is the one that settled an argument that had been going on in the Department since its founding, about whether the arch was primarily a structural solution or primarily a symbolic one. The book's conclusion — that the arch is both, and that this is not a contradiction but the whole point — took eleven years to reach.

The first section covers the physics of the arch: how a curve distributes load, why the keystone works, the mathematics of the catenary. This section is clear, precise, and accessible to a general reader. The Department is proud of this.

The second section asks why humans chose to build arches before they fully understood the mathematics of why arches work. The answer, the Department argues, is that the arch looks right. It looks like something that can bear weight. The intuition preceded the proof.

The final section is about what it means that the thing that looks like it can hold things up actually can. The Department considers this section the most important. It is also the shortest.