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Monte Laa – building sites 3 and 5

Visualisation: Monte Laa: Residential tower with more than 20 storeys between low-rise buildings and vegetated open spaces
Facts and Figures
Company PORR Bau GmbH, PORR Design & Engineering
PrincipalMonte Laa building site 3, Monte Laa building site 5
LocationVienna - Austria
Type Specialist civil engineering, M&E planning, Building Information Modeling, Tender management, Construction preparation, Structural engineering, General planning
Service duration12.2014 - 11.2017
Runtime12.2014 - 11.2017

A construction site presenting special challenges

Until the end of 2017, an office tower, two residential towers and two low-rise buildings will be erected in Vienna’s Monte Laa urban development area. The office tower will be 33 storeys high and partially extend over Vienna’s A23 inner-city motorway. The residential towers with their height of up to 100m will feature 32 and 21 storeys, respectively, the low-rise buildings up to ten.

PORR Bau GmbH serves as a general contractor in the framework of this new construction. PORR Design & Engineering has been commissioned with highly complex design tasks:


  • Preliminary draft
  • Draft
  • Submission
  • Execution statics
  • Formwork design
  • Reinforcement design

Technical building equipment

  • Preliminary draft
  • Draft
  • Submission

The building site’s soil conditions required to execute the project on a pile and raft foundation and use the cut-and-cover construction method. The integration of central safety installations for all building parts was executed particularly well. Thus, power supply, sprinkler central and emergency power supply are optimally used by the entire building complex.