Srinivasa Iyengar (civil engineer)

Srinivasa "Hal" Iyengar (born 6 May 1934 - died 4 July 2019) is an Indian American civil engineer and a senior structural consultant, who has been particularly instrumental in the development of innovative and efficient structural concepts and systems for high-rise, long-span and stadium structures.

Career

Iyengar has been involved in many notable projects such as the John Hancock Center, Sears Tower, the Anaheim Stadium expansion, the Soldier Field renovation, the McCormick Exposition Center in Chicago, the Convention Center in Hong Kong, Broadgate Phase 11, the Hotel Artes in Barcelona, the Guggenheim Museum in Bilbao, and Millennium Park in Chicago.^{[citation needed]} He was the director of Structural Engineering at Skidmore, Owings & Merrill from 1975 to 1992.

Iyengar has received numerous awards including the Fazlur Khan lifetime achievement medal.^[1]^[2] He has worked with notable architects such as Bruce Graham, Frank Gehry and Walter Netsch.^[3]

Iyengar was born into a prominent civil engineering family in Mysore India. He developed an enthusiasm for civil engineering early in life, and was employed by Skidmore, Owings & Merrill at a young age. He is now retired, and enjoys hiking and tennis with his daughter^[2] and son^[4].

Broadgate Exchange House

The Broadgate Phase 11 - Exchange House in London was Iyengar's most innovative structural engineering work.^[5] The building is directly over the top of Liverpool Street Station, a high traffic railroad station. But the rail station could not be touched so no supporting column could touch the ground. To solve this problem three different structural systems were used to support the 10 story tall building over the 78 meter clear span. These were an X-braced truss system, a 10 story catenary suspension system, and a parabolic arch system. It is basically a building-bridge hybrid.^[5]