Exhibit Area 1
(Plaza area)
Welcome Sign [main directory]
How the Bridge Spans the Golden Gate
Bridge Aesthetics - Art Deco on a Grand Scale
Tall and Strong - The Bridge Towers
Steel, Fog, Salt, Rust, and Paint

Exhibit Area 2
(near flagpole)
How the Bridge Vibrates
Foghorns

Exhibit Area 3
(West side of Bridge near underpass)
Historic Preservation: Lattice Strut Retrofit
Historic Preservation: Isolator Seismic Retrofit

Exhibit Area 4
(inside Battery area)
History: Design and Construction of the Bridge
Suspension Cable Tension vs. Tower Height
Battery Lancaster - Defending the Golden Gate

Exhibit Area 5
(along bike path to lower parking lot)
Bridge Deck Aerodynamics
Bridge Deck Torsional Resistance Retrofit
Wind Speed and Wind Pressure

Exhibit Area 6
(near Pavillion)
LIFETILES: animated construction of the Bridge
Braille / Tactile Model of the Bridge



Project Partners

GGBHTD
Golden Gate Bridge,
Highway and Transporation District



CUREE

Consortium of Universities for Research
in Earthquake Engineering

Main Menu : Exhibit Area 4

History of the Design and Construction of the Bridge

The Golden Gate strait is a gap in a mountain range that was cut by an ancient river that passed through what was a dry valley until 10,000 years ago. That was when sea level was over 100 meters lower than today. The melting ice caused by the end of the last ice age raised the level of the sea, and the ocean slowly flowed back up the river canyon to form San Francisco Bay. Today, 60% of the rain and snow that falls on the State of California still drains through the Golden Gate.

The Golden Gate strait is the reason for the strong tides, frequent winds, fog, and salt air, all of which posed challenges for building a bridge across it. In addition, the infamous San Andreas Fault, cause of the 1906 San Francisco Earthquake, is only 7 miles (11 kilometers) offshore.

Native Americans lived around San Francisco Bay at least 4,000 years ago. Once Spanish explorers discovered the many natural resources of the area and the desirability of the Bay as a harbor, they established in 1776 a settlement called Yerba Buena, later re-named San Francisco.

In 1848, the population of the city was less than 500; in 1849, because of the Gold Rush, it was suddenly ten times greater. Shortly after 1900 the Bay Region’s population had reached a million. The major north-south highway in California, Highway 101, needed to span the Gate to become a viable statewide transportation artery.

In the early decades of the twentieth century, civil engineering made dramatic advances in the design and construction of long-span bridges. A great bridge across the Gate, an impossible vision before then, became a challenging possibility.  Despite political opposition, scarce funds in the Great Depression that began in 1929, and the immense physical challenges of bridging a mile of water, the people of six counties in northern California voted to finance the Golden Gate Bridge. Engineers and construction workers with imagination, courage, and determination then came together to design and build what until then had been considered “the bridge that couldn’t be built.”

LEARN MORE

1. Bridging the Gate - The Beginning

2. Engineering The Design

3. Working Under Water

4. A Bathtub for the South Tower

5. World's Tallest Bridge Towers

6. Spinning the Main Cables

7. Hanging the Roadway Deck

8. All In A Day's Work

9. A Lasting Monument

For more information -

Golden Gate Bridge Historic Construction Photos
http://goldengatebridge.org/photos/history.php

Golden Gate Bridge Historic Construction Photos
http://goldengatebridge.org/research/facts.php#Documentaries


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Last updated: 11.16.12