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Mackinac Bridge 1957

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  • Mackinac City, Michigan, USA
  • Across Straits of Mackinac
  • Main span 1158m/3800ft
  • Suspension bridge
  • 4 lane highway
  • Length 8038m/26,372ft
  • Designed by Robinson & Steinman
  • Chief engineer David Steinman
  • Construction started in 1954
  • Every Labor Day, two lanes of the bridge are only open to walkers for the Mackinac Bridge Walk

DECK

  • Deep truss steel deck 21m wide and 11.6m deep

 

TOWERS

  • Height of main towers above water 168m/552ft

PIERS

  • Maximum depth of piers 32m/105ft.

CABLES

  • Number of wires in each cable 12,580
  • Total length of cable 42,000 miles