Case LE-CS-2026-05 · Format illustration based on publicly reported information
| Property | Harmon Hotel, CityCenter, Las Vegas, NV |
|---|---|
| Structure | Planned 49-story (later 28) elliptical hotel tower, reinforced concrete |
| Defect | Improperly placed/missing reinforcing steel in shear-wall link beams across approx. 15 floors, found in 2008 |
| Construction | Halted at 26 stories; never opened |
| Outcome | After litigation, dismantled floor-by-floor (2014–2015) |
| Status | Demolished — the defect was judged impractical to repair economically |
Summary
During routine inspection in 2008, inspectors discovered that reinforcing steel in critical link beams had been misplaced or omitted on multiple floors, and that inspection reports had failed to flag it. Subsequent analyses concluded the tower, as built, might not survive a code-level earthquake.
The Harmon is the rare case where the recommended repair is, effectively, deconstruction: the defective elements were so numerous, so inaccessible, and so central to the lateral system that remediation cost approached replacement cost. Its real engineering lesson is about inspection during construction, not repair after it.
Observed Conditions
Link-beam reinforcement (the ductile fuses of a coupled shear-wall system) installed at wrong positions or congested/omitted across approx. 15 floors.
Special-inspection documentation did not reflect field reality; discrepancies surfaced only after a third-party review.
No visible distress: the deficiency was invisible from finished surfaces — detectable only by records review, scanning, or demolition of cover concrete.
Probable Cause
Rebar placement errors in heavily congested link beams, repeated across floors before detection.
Failure of the special inspection chain: placement was signed off without effective verification.
Coupled shear-wall systems concentrate seismic demand in link beams; deficiencies there degrade the entire lateral system, not one member.
Engineering Assessment
Analyses commissioned during litigation disagreed on numbers but agreed on the core point: as-built link beams could not be shown to deliver the ductility the design assumed. In a high-seismic-demand zone, a lateral system that cannot be verified is a lateral system that cannot be trusted.
Repair options — exposing and rebuilding hundreds of embedded beams, or wrapping/post-tensioning alternatives — were evaluated and priced; none could restore code-level confidence at a cost that made the asset viable. The economically rational engineering recommendation became controlled deconstruction.
Repairs & Remediation
Forensic as-built verification: GPR scanning and selective demolition of cover at statistically sampled link beams on every floor.
Independent re-analysis of the lateral system using as-found reinforcement, not design drawings.
Repair feasibility matrix: per-element strengthening (FRP wrap, supplemental steel, post-tensioning) priced against verified deficiency counts.
Decision gate: if verified capacity cannot reach code demand at less than replacement cost, recommend deconstruction — documented, sealed, and defensible.
For projects still under construction: stop-work and re-inspection of all completed critical elements before any further vertical progress.
Monitoring
During deconstruction: vibration and stability monitoring of adjacent occupied structures.
Process lesson institutionalized: special inspections at every pour for congested elements, with photographic evidence tied to each sign-off.
Owner-side audit of inspection records at each construction phase — not only at closeout.
Engineering Takeaway
Every dollar of inspection during construction buys back a hundred at closeout. The Harmon failed not because engineers could not design link beams, but because nobody verified they were built as designed — floor after floor. This is exactly what phase inspections exist to prevent: our new-construction inspections verify reinforcement before concrete hides it forever. If you are building in DFW, inspect at pre-pour, framing, and final — not just at the end.