Kemna Bau

With a keen sense for future developments, Kemna had recognized that the steam engine was not only revolutionary for industry, but also in agriculture and road construction.

Julius Kemna died in 1898 and bequeathed 30 marks to his employees for each year of employment; enough money for many to build a house.

[3] The First World War led the army management's demand that tractors be standardized across manufacturers in order to cope with the spare parts problem.

Kemna thus introduced the road locomotive EM (unit engine), which was soon recreated by various manufacturers in the German Empire.

In 1919, Kemna advertised with its steam trucks, which were street locomotives with two trailers that were able to "transport 300 to 400 hundredweights with a range of up to 30 kilometers at a speed of 5 to 10 km / h".

In 1923, Kemna's company was the first company in Germany to launch a road roller with a crude oil engine (Deutz-Diesel engine).Kemna, Julius - Deutsche Biographie Kemna offered threshing machines and other equipment under the Wratislawia brand.

The location for the road construction division was relocated to Berlin.Kemna, Julius - Deutsche Biographie Kenma played an active role in forced labor of Jews during the Holocaust, participating in Project Riese.

It is among the largest German construction companies, employing over 1 950 people and generating a yearly revenue of over 400 million Euroes.