Buildings · Frontier
SlabCreep: Structural Micro-Deflection Monitor
Watches for floors slowly sagging or walls slowly leaning, millimetre by millimetre.
Plausible physics, early work — shown honestly as an experiment.
How it works
WiFi waves bounce off floors and ceilings, and the length of each bounce path depends on exactly where those surfaces are. A slab sagging a few millimetres changes those paths by a tiny but measurable amount. One day means nothing; the same slow shift, week after week, in the same direction, is a structure moving.
In the physics: Reflection path lengths are set by surface positions: a slab midspan sagging 5mm changes ceiling-bounce path lengths by ~10mm round-trip — ~0.03ns of delay and a measurable phase rotation at 5GHz. Individually tiny, but coherent integration across many links/paths over weeks separates monotonic geometric drift from thermal expansion cycles (which are diurnal and reversible).
See it work
This is real pipeline output for Buildings, replayed. The exact reading depends on your room.
Go deeper
How the field becomes an answer
How we prove it
Own-hardware: mount a large reflective panel on a micrometer stage in a live room, command 1-10mm displacements over days under normal thermal cycling, verify detection threshold; then a loading-dock mezzanine with survey-grade level as ground truth.
Who it is for
For the structural engineer of record / REIT risk officer: 'Post-Surfside assurance: your building's own WiFi watches for millimeter structural movement 24/7 between the five-year inspections.'
The matching solution
Complete first-room estimateFloor Utilization Node3 nodes · ~$130 parts · 90 min Request kit, subscribe, or set up →Compatible DIY hardware options
120 min · advanced
240 min · installer