Humpback plate
Buckle plates were iron plates developed in the second half of the 19th century by the Irish engineer Robert Mallet , who was then working in London, for use in the supporting structures of various iron structures, in particular for the manufacture of the decks for railway and road bridges.
They were square or rectangular plates made of at least 6 mm thick sheet iron with a flat edge all around and a trough-shaped bulge in the middle. They were used as standing hump plates (with the bulge up) or as hanging hump plates (with the bulge down and a hole in the middle for drainage). They were attached to the longitudinal and transverse girders of iron bridges and served as a base for the ballast, concrete or asphalt concrete on which the tracks or the actual roadway were arranged. Zoresis irons were mostly used for larger loads .
Later they were further developed into steel buckled plates .
Individual evidence
- Hump plates. In: Otto Lueger (ed.): Lexicon of the entire technology and its auxiliary sciences , Vol. 2, Stuttgart, Leipzig 1905, pp. 384–385. On Zeno.org
- Bridge deck. In: Otto Lueger (Ed.): Lexicon of the entire technology and its auxiliary sciences , Vol. 2, Stuttgart, Leipzig 1905, pp. 355–357. On Zeno.org
- Mallet's hunched tin plates. In: Polytechnisches Journal . 191, 1869, Miszelle 3, p. 250.
- Baumschöttel : Report on some of the load tests carried out during the construction of the Berlin city railway to determine the load-bearing capacity of hanging hump plates. In: Zeitschrift für Bauwesen 1880, p. 278 ( digitized version of the Central and State Library Berlin)
- Martin Grüning : Der Eisenbau I. In: Robert Otzen (Hrsg.): Reference library for civil engineers . Julius Springer, Berlin 1929, ISBN 3-642-89105-5 , p. 161 ( limited preview in Google Book search).
- A. Agatz et al. a .: Pocket book for civil engineers . Ed .: Ferdinant Schleicher. Springer-Verlag, Berlin 1943, ISBN 3-642-98892-X , p. 1706 ( limited preview in Google Book Search).