New Tacoma Narrows Bridge

The New Tacoma Narrows Bridge was built to supplement the replacement bridge built in 1950 after the original bridge nicknamed "Galloping Girdy" collapsed due to high winds in 1940. Not surprisingly, the area still receives winds as high as 50mph so the new bridge had to take into account a number of environmental factors, including 150ft deep water and strong currents. Parsons used LARSA 4D to model and analyze the structure insuring that the disaster of 1940 would not be repeated.

Project Details

  • Client:Parsons Transportation Group
  • Location: Tacoma, Washington
  • Date: 2005
  • Design Type: Cable-Suspended