Antal Kherndl

* Zseliz, 10 May 1842 – † Budapest, 7 October 1919 / bridge construction engineer, university professor, full member of the Hungarian Academy of Sciences (1898) ; ; Graduated from the Buda High School. He completed his technical studies in Budapest, Karlsruhe, and Zurich (with Karl Culman), obtaining an engineering diploma in 1864. After that, he worked in Baden. In 1865, he contributed to the design of the Heidelberg–Heilbronn railway line, especially the iron bridges. In 1866, he was an employee of the technical office of the city of Zurich, from 1867 he was an assistant professor at the Royal Joseph Technical University of Pest, from 1869 he was a public full professor of waterway and railway engineering, and from 1881 he was a public full professor of bridge engineering. He retired in 1914. His research results in the field of bridge construction theory showed a new direction for solving the problems of statically indeterminate girders. His pioneering theoretical findings in graphostatics (for which he won the Marczibányi Prize of the Hungarian Academy of Sciences in 1897, the gold medal of the Hungarian Society of Engineers in 1905 and the Grand Prize of the Hungarian Academy of Sciences in 1910) were confirmed, among others, by the construction of the Elizabeth Bridge before World War II, the design of which he partially revised. He participated in the preparation of the construction plans for the Ferenc József Bridge in Budapest and the reconstruction of the old Chain Bridge. He was one of the founders, secretary (1869–1870), and then honorary member of the Hungarian Society of Engineers and Architects, vice-president of the National Public Works Council (1906–1914). He was elected a corresponding member of the Hungarian Academy of Sciences in 1884 and a full member in 1898. ; ; His main works: ; On the theory of beams with statically indeterminate reactions (Proceedings of the Hungarian Society of Engineers and Architects – MMÉK), 1883–1884, ; On the graphical theory of the stiffening beams of chain bridges (Essays from the Circle of Mathematical Sciences – academic chair), 1891, ; On the graphical theory of multi-supported beams and stiffening beams of multi-span suspension bridges (MMÉK), 1895, ; On the graphical theory of multi-supported arches and rigid suspension beams (MMÉK), 1897, ; On the theory of the stiffening beams of chain bridges, 1891, ; Graphostatics of Girders I/1-2., 1893– 1903, ; On the Graphical Theory of Hinged Girders with Statically Indeterminate Reactions (MMÉK), 1904, ; Graphical Theory of Multi-Span Braced Girder Suspension Bridges (MMÉK), 1906, ; Iron Structures. I. Railway Iron Bridge Structures (Czakó Adolffal), 1907.