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Committee presses peer reviewer and DBI on Millennium Tower outriggers and foundation analysis
Summary
The GAO Committee continued its review of Millennium Tower safety. A peer reviewer flagged concerns about outrigger design and recommended nonlinear analysis; DBI consultants have requested additional pile/foundation data and expect further materials in weeks as part of an ongoing technical review.
Supervisor Aaron Peskin reopened the Committee—9s continuing inquiry into tall‑building seismic standards and the Millennium Tower (301 Mission Street). The session included sworn testimony from peer reviewer Hardeep Singh Panu (Middlebrook & Louie) about peer review scope and technical concerns, and Department of Building Inspection staff described ongoing consultant review of superstructure and foundation analyses.
Panu described the peer review role as independent and iterative. He said the building relied on shear walls, moment frames and outriggers that connect those systems, and that the…
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