Pressure tap & Sudhop

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Drenckhahn & Sudhop was a construction company in Braunschweig , the founders were G. Drenckhahn and C. Sudhop . The company was one of the pioneers of reinforced concrete construction in Germany and, through its long-term collaboration with Max Möller, made a significant contribution to scientific progress in this field.

history

The company was founded in 1889 and initially produced cement products such as sewer pipes and artificial stone from concrete, later reinforced concrete and stamped concrete bridges followed . Around 1914 there was a branch in Berlin-Wilmersdorf and from 1914 to at least 1928 also in Danzig . In 1923 the company was converted into a stock corporation. At that time, the capital was 17 million marks due to inflation and was converted to 340,000 Reichsmarks after the currency stabilized. In 1925, the graduate engineer Otto Amme managed the company as sole director, while the supervisory board, alongside the mechanical engineering entrepreneur Ernst Amme and his son Ernst Amme jun. the bankers Max Gutkind and Alfred Wolff von der Sahl belonged - the family names of the company's founders no longer appeared.

Möller bridges

Description of the design of the patent specification

From 1895 Max Möller began with empirical studies on the bond between iron and concrete. In addition to the test series to ground anchors, later as cement - ground anchors with metallic insert patented by Denckhahn & Sudhop, he also began with attempts to form a ceiling Construktion on bridges, the beam flanges ceiling. The development arose from the desire to combine the advantages of both materials. While concrete can withstand large compressive forces such as those on the top of a girder , iron or the mild steel used is well suited to absorb the tensile forces on the underside of the girder.

The development took place primarily on their own premises at their own expense. In return, the bridges were later primarily built by this company. The underlying construction principle of the hanging belt carrier was protected by patent by Drenckhahn & Sudhop.

Up to 1903, 150 bridges built by Drenckhahn & Sudhop according to this construction principle can be verified.

buildings

The exact number of buildings can no longer be traced. However, a company profile published around 1906 shows that at this point in time over 200 bridges (mostly according to the Möller system), several thousand square meters of reinforced concrete ceilings, water tanks for the water supply of nine communities, crystallization basins for several sugar factories and various other stamped concrete and reinforced concrete -Buildings such as bank reinforcements and enclosure walls were erected. In addition, there are the patented pipes made of cement-concrete with walls reinforced at the cross-sections and iron insert , also developed in cooperation with Max Möller. The reinforcement to absorb the tensile forces as well as the execution with strengthening at higher stressed cross-sections and weakening at less stressed areas was new . The achievable light diameter was two meters.

Ferdinand Bridge in Braunschweig

Several hundred bridges based on the construction principle of the suspension belt carrier are detectable in Anhalt , in the Duchy of Braunschweig , in the province of Hanover , in the Saarland , in Württemberg , etc. a .:

literature

  • Drenckhahn & Sudhop (Ed.): Drenckhahn & Sudhop. (Photo catalog) Braunschweig undated (around 1907). ( Digitized version )
  • NN: Drenckhahn & Sudhop, Braunschweig. Buchdruckerei Julius Krampe, Braunschweig undated (around 1906). ( Digitized version )
  • Max Möller: Belt girder ceilings, Möller system. In: Zeitschrift für Bauwesen , Volume 47, 1897, Issues I – III, Columns 143–148. ( online as a PDF document with 8.2 MB)

Web links

Commons : Drenckhahn & Sudhop  - Collection of images, videos and audio files

Individual evidence

  1. ↑ a b Council of the City of Braunschweig (ed.): Braunschweig. (= Germany's urban development .) 2nd edition, Deutscher Architektur- und Industrie-Verlag , Berlin-Halensee 1928, p. 247.
  2. ↑ Concrete Calendar , Volume 10, Issue 2 ( excerpt from Google books )
  3. ↑ a b Handbook of German Stock Companies , 30th edition 1925, Volume 1, p. 292.
  4. ↑ Ludwig Franzius , Ed. Sonne (Ed.): The hydraulic engineering. (= Handbuch der Ingenieurwissenschaften (...) , [1.] - 3. Department.) Excerpt from google-books
  5. ↑ Strengthening the Pleiße bridges. The renovation of Möllerträger ( Memento of the original from February 15, 2005 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.uni-leipzig.de
  6. ↑ a b c d N. N .: Drenckhahn & Sudhop, Braunschweig. (...)