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The Golden Gate Bridge

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1920: A feasibility Study recommends construction of the Golden Gate Bridge ... Build a bridge spanning the Golden Gate -Must be tall enough for ships to pass ... – PowerPoint PPT presentation

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Title: The Golden Gate Bridge


1
The Golden Gate Bridge
Presented by The Third Row Six Presenters Bre
tt Portner-Kuhlow Scott Tumm
2
Important Dates
  • 1920 A feasibility Study recommends
    construction of the Golden Gate Bridge
  • 1923 The State Legislature Passes the Golden
    Gate Bridge and Highway District Act of
    California into Law
  • 1930 Joseph Strauss, Chief Engineer submits his
    final plans for the bridge
  • January 5, 1933 Construction of the bridge
    begins

3
  • February 1933 Anchorages are completed
  • June 1935 The towers are completed
  • March 1936 The suspension cables are completed
  • April 1937 The deck surface is completed

4
  • Official Pedestrian Day
  • May 27, 1937
  • Bridge opens for traffic
  • May 28, 1937

5
Spanning the Golden Gate
  • The entrance to San Francisco Bay was named the
    Golden Gate by early settlers
  • One mile wide gap
  • 60 Mph wind tunnel like gusts of wind for much of
    the year
  • 2.5 Million cubic feet of water per second pass
    through the Golden Gate
  • Currents
  • Earthquakes

6
Project Management Before the Manhattan Project
  • James Reed
  • General Manager

Joseph Strauss Chief Engineer
7
Joseph Strauss Chief Engineer
8
Strauss the Man
  • Rude
  • Short-tempered
  • Arrogant
  • Labeled brilliant bully by his peers
  • -Strauss thought big. His graduate thesis
    proposed a 50 mile long bridge across the Bering
    Strait that would connect Siberia and Alaska.

9
Scope
  • Build a bridge spanning the Golden Gate
  • -Must be tall enough for ships to pass
    underneath

10
Time
  • There was no real set timetable managers ensured
    the project progressed as quickly as possible.

11
Cost
  • 73,000,000

12
Financial Facts
  • 35 million in bonds
  • 38 million in interest
  • Bridge completely paid off on June 30, 1971
  • Bridge completely paid for by tolls
  • No state or federal money went into the bridge
  • Bank of America extended a 5 million line of
    credit to the bridge project
  • People put up their homes, farms and businesses
    as collateral for the bridge to generate the 35
    million in bond issue
  • Presently, bridge still operates only with money
    collected from tolls

13
To Build a Bridge
  • Strauss spent three years researching his first
    design
  • He assembled a team of engineers to create the
    final design
  • Strauss expected that three dozen workers would
    die during the construction, about one for every
    one million dollars spent on the construction
  • 11 deaths occurred

14
Black Wednesday February 17, 1937
  • A scaffold slipped off the bridge and through the
    protective netting below, taking ten men to their
    deaths.

15
Safety Under Strauss
  • 1st Mandatory use of hard hats
  • Issuing of safety belts and tie off lines
  • Dizzy riveters respirators for burning paint
    fumes
  • Riveters and ironworkers required to wear leather
    gloves
  • Sun goggles, sun-block lotion
  • Field hospital at south end staffed full time
    treated 12,000 injuries by December, 1935.
  • No deaths for the first 3 years and 8 months of
    project

16
The Net
  • 120,000 Safety net suspended 60 feet below the
    road surface nineteen men saved

17
The Halfway to Hell Club
  • Nineteen official members, some jumped for fun
  • Named by tabloids looking for a story
  • First official member hit the ground as well,
    broke four vertebrae

18
Unexpected Delays and Challenges
  • Temporary trestle knocked over twice
  • The ten day San Francisco Strike
  • Fort Point

19
Fort Point
  • Located directly under south end of bridge
  • Historians and the community in general protested
    to preserve the fort

20
Records held by the Bridge (in 1937)
  • Longest bridge
  • Tallest free standing structure in the world
    (over 740 feet)

21
Golden Gate Fun Facts
  • Riveting crew held unofficial speed contests
    they sometimes threw red-hot rivets distances of
    70 feet or more
  • 80,000 miles of pencil diameter steel cable in
    bridge
  • Steel for the bridge was made in Pennsylvania and
    shipped to California via the Panama Canal
  • 75,000 paid in tolls each day
  • A gold rivet was hammered into place to celebrate
    the completion of the bridge
  • International Orange
  • Blind woman and guide dog the first pedestrians
    ever to cross the bridge
  • 1.25 billion cars have crossed bridge since 37
  • Bridge Firsts
  • First person to cross on stilts
  • First person to cross sticking tongue out all
    the way
  • First wooden hat to cross the bridge
  • Each anchorage weighs as much as 17,000 elephants

22
References
  • Barter, James. The Golden Gate Bridge. San Diego
    Lucent Books, 2001.
  • The Golden Gate Bridge. Narr. Jack Perkins.
    Videocassette. AE Home Video, 1994.
  • Strauss, Joseph. The Golden Gate Bridge. San
    Francisco Golden Gate Bridge and Highway
    District, 1938.
  • Van Der Zee, John. The Gate The True Story of
    the Design and Construction of the Golden Gate
    Bridge. New York Simon and Schuster, 1986.
  • www.inetours.com/Pages/SFNbrhds/Golden_Gate_Bridge
    .html
  • www.goldengatebridge.org
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