Institute of Bridge Engr.,Wind Tunnel Lab. 1.风灾 Tacoma Narrow Bridge November 7,1940,Tacoma Narrows Bridge Designer:Leon Moisseiff,Velocity:18~22m/s. Movie Prof.F.B.Farquharson,University of Washington. Tacoma Narrow Bridge Movie November 7, 1940, Tacoma Narrows Bridge Designer：Leon Moisseiff, Velocity: 18～22m/s. Prof. F.B. Farquharson, University of Washington. Institute of Bridge Engr., Wind Tunnel Lab. 1. 风灾