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How America Built the Golden Gate Bridge Over 4,200 Feet of Open Water and Fog

Global Old History

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How America Built the Golden Gate Bridge Over 4,200 Feet of Open Water and Fog

7 886 просмотров · 10 дней назад
Global Old History
32,4 тыс. подписчиков
7 886 просмотров · 10 дней назад
How America Built the Golden Gate Bridge Over 4,200 Feet of Open Water and Fog In the 1930s, engineers proposed something many people thought was impossible. Build a suspension bridge across the **Golden Gate Strait**—a deep, turbulent entrance to San Francisco Bay filled with powerful currents, heavy fog, strong winds, and constant ship traffic. The main span would stretch *4,200 feet* between its towers. At the time, nothing like it had ever been completed. Construction began in **1933**, during the Great Depression. Before workers could suspend a roadway over the strait, they first had to build enormous foundations capable of supporting towers rising **746 feet above the water**. The south tower presented one of the greatest challenges. Workers constructed a massive protective fender in the open strait while waves and currents repeatedly battered the site. Inside it, crews excavated and prepared the foundation that would carry thousands of tons of steel. Then came the cables. Each of the Golden Gate Bridge's two main cables was created from **27,572 individual steel wires**. If all the wire used in the cables were placed end to end, it would stretch tens of thousands of miles. Those cables carried the roadway between the towers. But construction remained extraordinarily dangerous. Chief engineer *Joseph Strauss* introduced an enormous safety net beneath much of the work area—an unusual precaution for major bridge construction at the time. The net saved **19 workers**, who became known as members of the “Halfway to Hell Club.” Even with those precautions, 11 workers ultimately died during construction. Then there was the fog. San Francisco's famous fog could swallow towers, ships, and construction crews, while powerful winds swept through the narrow opening between the Pacific Ocean and the bay. Engineers had to create a structure flexible enough to move with wind and changing loads without losing its strength. After more than four years of construction, the Golden Gate Bridge opened to pedestrians on **May 27, 1937**. Vehicles crossed the following day. Its *4,200-foot main span* became the longest suspension-bridge span in the world—a record it held until 1964. Today, the bridge looks almost inevitable. But in the 1930s, it represented an extraordinary gamble in steel, concrete, cables, and human labor. In this video, we explore how America built the Golden Gate Bridge across 4,200 feet of open water, how engineers constructed foundations inside one of the world's most challenging straits, how thousands of individual wires became enormous suspension cables, and how workers battled wind, waves, currents, and fog to connect San Francisco with Marin County. They didn't eliminate the obstacles. They built straight through them. SOURCES: Golden Gate Bridge, Highway and Transportation District — Bridge History https://www.goldengate.org/bridge/his... Golden Gate Bridge — Construction Statistics https://www.goldengate.org/bridge/his... National Park Service — Golden Gate Bridge https://www.nps.gov/goga/learn/histor... Library of Congress — Golden Gate Bridge https://www.loc.gov/pictures/search/?... #GoldenGateBridge #Engineering #AmericanHistory #MegaProjects #SanFrancisco #BridgeConstruction #Infrastructure #ConstructionHistory