Bridge History
When did the bridge open?
July 1, 1940?
Cause: After the collapse. . .
Effect: They made a new bridge, one that's more sturdier
A 1940's design that used 8-foot solid vertical beams and that trapped wind, leading to the failure?
Deep Plate Girders
Who was the lead designer of the Tacoma's Narrow Bridge?
Leon Moisseiff
Who was the victim that survived a 190 foot drop at 60 mph from the bridge?
Pete Kreller
How long was the Tacoma's Narrow Bridge up for, before it Collapse?
4 months and 7 days
Cause: A Reporter left and abandoned his car leaving...
Effect: His dog to die
What collapse of the Narrows Bridge is a famous object lesson in this field, highlighting the necessity of considering aerodynamics, and not just strength?
Structural Engineering
Who was the Initial Engineer?
Clark Eldridge
How much did the old bridge cost before the collapse?
$6.4 million
How long was the bridge before it collapsed?
5,939 feet
Cause: The remains of the collapse made the worlds biggest and that it supports marine life.
Effect: Man-Made Reef
How did Aerodynamic Instability effect the bridge during the collapse?
The Bridge had twisted 45 degrees and 28 feet high
What company helped supplied steel for the bridge?
Bethlehem Steel Company
How much did the replacement bridge cost after the collapse?
$14 million
What is the Tacoma's Narrow Bridge nickname, before the collapse?
The Galloping Gertie
Cause: The collapsed of the center span.
Effect: This cause the partial sheering of rivets that attached the towers to the tops of the piers.
This object was used for the new Sturdy Gertie to allow wind to pass through the deck so that it can reduce aerodynamic pressure?
Wind Grates
Who was the Oregon engineer that predicted that the bridge was going to collapse and that was later hired?
Dexter R. Smith
What year did the engineers who worked on this bridge project, installed a new second span?
2007
What was the victim that died in the collapsed and how?
Tubby, a black cocker spaniel dog was the only victim that died from the bridge collapse. The dog was trapped in a abandoned car.
Cause: Aeroelastic Flutter
Effect: Self-induced vibration where wind caused the bridge's deck to twist uncontrollably.
What structural feature was used for the Bridge to prevent the bridge to twist after it was built again?
Double Lateral Bracing
What company helped provided cables and wires?
John A. Roebling's Sons Company of New York
How much did the second span cost?
$1.5 billion