T. Y. Lin International
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| Private | |
| Industry | Civil and Structural Engineering |
| Founded | June 1, 1954 |
| Headquarters | San Francisco, California |
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Key people
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| Website | Official website |
T. Y. Lin International (TYLI) is a global, multi-disciplinary infrastructure services firm. Headquartered in San Francisco, TYLI established its business in the design of long-span bridges and specialty structures.
The firm provides a range of planning, design, construction and project management services to the aviation; bridge; facilities; mobility, planning, and management; ports and marine; rail and transit; and surface transportation industries. TYLI operates from more than 50 regional centers across four continents, and employs a professional staff of more than 2,500 engineers, planners, architects and scientists.
1950s: TYLI was founded on June 1, 1954 by Tung-Yen Lin, a Chinese-American structural engineer recognized worldwide as an innovator in bridge design, engineering, and construction. Lin is credited with standardizing the practical use of prestressed concrete. He is also known for his emphasis on the structural aesthetics aspect of engineering, regardless of a project’s economic limitations.
1960s–1970s: Lin continued to expand his firm’s specialty in prestressed concrete to broader consulting services, with projects that included conventionally reinforced concrete, structural steel, masonry, and timber-framed structures. In 1967, he designed the 18-story shear wall Bank of America building in Managua, Nicaragua. The reinforced concrete tower was one of only two structures left standing after the country’s 1972 earthquake. Lin also became known for his design innovations, such as the Rio Colorado Bridge, an upside-down suspension bridge spanning a deep gorge in Costa Rica. In the early '70s, the firm also established offices in Taiwan and Singapore.
1980s: TYLI expanded with new offices in Kuala Lumpur and a merger with Maine-based Hunter-Bellow Associates in the U.S. In 1986, when U.S. President Ronald Reagan presented Lin with the National Medal of Science, he responded by handing the former president a detailed plan for a 50-mile-long (80 km) “Intercontinental Peace Bridge” connecting Alaska and Siberia across the Bering Strait. In 1989, TYLI was acquired by the Dar Group, an international network of professional service firms located in 45 countries.
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