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Model disagreement clouds wind‑safety findings for proposed Tenth & Market tower

San Francisco Planning Commission · February 8, 2007
AI-Generated Content: All content on this page was generated by AI to highlight key points from the meeting. For complete details and context, we recommend watching the full video. so we can fix them.

Summary

Staff and independent consultants reported conflicting wind‑tunnel and computational model results for a high‑wind threshold at the Tenth & Market project site, prompting calls for method comparison, possible code guidance on repeatability/error margins, and a plan for cumulative impact analysis.

City staff and outside consultants told the Planning Commission that repeated wind‑tunnel tests can yield divergent counts of 'hazardous wind' hours at the same test points, and that computational (digital) modeling can help visualize flow patterns that explain differences.

Why it matters: For projects near Fox Plaza and other high‑wind locations, small differences in measured wind velocity can change whether a design meets the planning code's hazard threshold (26 mph for…

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