Almost 90,000 Cobiax void formers for two Munich construction projects
14.03.2018Both the project Zielstattstrasse 27, and the project on the Flössergasse 6 construction field have been created by the construction company M. Haseitl Baugesellschaft mbH & Co. Betriebs KG. The overall planning was undertaken by Seidl & Partner Gesamtplanung GmbH.
The Slim-Line void formers on the ground floor slab of the project “Zielstattstrasse 27” being concreted
Figure: Cobiax
The advantages of the Cobiax slab technology were presented to the engineers at Seidl & Partner Gesamtplanung GmbH within the scope of a system presentation. As a result, the structural engineers were able to familiarize themselves with Cobiax and its extensive benefits, which is why Cobiax void formers were incorporated into the design of the four-storey hotel and retail trade project in the Flössergasse.
Reduced slab dead loads
From a constructional point of view, architectural specifications and the complex load transfer associated with them led to in part extremely high reinforcement concentrations in various building elements. In order to ensure significant relief in the form of reduced slab dead loads, and therefore a reduction of the reinforcements in the entire building, 17,000 S160-180c2 void formers from the Slim-Line product group were installed with 2,000 m² void former area over 5,300 m² slab area in the retail and hotel project in the Flössergasse.
As a result, the dead load could be reduced by 450 t and also large slab span widths with few supports could be realized, which led to a positive side-effect for the building owner in the form of greater flexibility for the room layout. And the construction company was spared the installation of approx. 175 m³ of concrete.
Use in the Zielstattstrasse 27 project
Due to the excellent experience gathered with the use of Cobiax voided flat plate slab technology on the construction field at Flössergasse 6, the Cobiax void formers of the Slim-Line product series were also planned and implemented for the second current project at the construction field at Zielstattstrasse 27.
For realization of the project, the S180-200c2 Slim-Line void formers were calculated into all the storey slabs statics across approx. 7,000 m² slab area, and the Slim-Line S220-240c2 void formers across a further 1,400 m² slab area.
The structural engineer at Seidl & Partner Gesamtplanung GmbH also views the advantages of the Cobiax-System as being expedient also for the project in the Zielstattstraße 27. This is because as few columns as possible should be used for the underground garage to prevent narrowing of the parking spaces and the traffic areas. For the storeys above ground, the investor placed great value on having as few columns as possible and the extremely flexible utilization of areas. The respective dead load reduction of the storey slabs using Cobiax void formers provided the structural engineers with the necessary freedom to be able to safely implement the requirements. The stress analyst estimates the total dead load reduction to be around 20% for this project, too.
CONTACT
Heinze Cobiax Deutschland GmbH
Otto-von-Guericke-Ring 10
65205 Wiesbaden/Germany
+49 6122 91845-00
