Without this continuous cycle of inspection and repair, the structure would degrade far more rapidly. The bridge is coated in a specialized international orange paint that serves as the primary barrier against rust, but even this robust coating is gradually worn down by friction, weather, and ultraviolet light.
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The constant cycle of expansion and contraction caused by temperature changes and traffic vibration further stresses the metal components, creating microscopic cracks that can evolve into more significant structural weaknesses if left unchecked. Engineering Marvels and Their Lifespans When the Golden Gate Bridge opened in 1937, it was the longest suspension bridge in the world, an achievement celebrated for its innovative design and ambitious construction.
A dedicated team of painters and ironworkers operates year-round, conducting inspections and repairs that are as vital to the bridge's survival as the original construction. Where the paint is scratched or thin, steel is exposed to the oxidizing effects of air and water, leading to the formation of rust.
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The bridge's two main cables, each composed of over 27,000 individual wires, are a primary focus of this maintenance, as they bear the immense tension required to support the deck and traffic. The iconic red span, suspended high above the churning waters of the San Francisco Bay, is a testament to human engineering, yet it naturally prompts questions about its long-term durability.
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