Polygon-shaped challenges

Winding floor slab formed using AluFix and columns with StarTec XT

Data & Facts

  • Project 

    New multi-family house, Kempten, Germany

  • Principal

    Sozialbau Kempten, Wohnungs- und Städtebau GmbH

  • Contractor 

    B. Wassermann Bauunternehmung, Kempten, Germany

  • MEVA systems 

    AluFix wall formwork, Mammut XT wall formwork, StarTec XT wall formwork, LAB working platform

  • Engineering and support 

    MEVA Schalungs-Systeme, Haiterbach, Germany

It doesn’t always have to be right-angled

It doesn’t always have to be right-angled. The residential buildings on the “Funkenwiese” in the German town of Kempten have polygonal floor plans with a variety of angles. The construction company B. Wassermann Bauunternehmung values the efficiency of its AluFix formwork and also employs the wall formwork systems StarTec XT and Mammut XT as well as the LAB working platform.

Seven multi-family houses are currently being built on a park-like plot of land. However, these are not your typical rectangular buildings with a maximum utility value. On the contrary, the two larger and the five smaller buildings march to a different tune: polygonal floor plans with numerous non-rightangled corners present the construction companies with tasks that do not occur every day.

Easy-to-handle and quickly set
B.Wassermann Bauunternehmung was commissioned with the construction of the building shell of one of the larger buildings. An elongated floor plan in the form of a stylised rosetwig is being created on a surface area of 1,075 m² and above an adjacent underground garage of 1,000 m². The building consists of five storeys including the basement and the ground floor with heights of 3.00 and 3.30 m respectively as well as three upper floors, each with a height of 2.65 m. A floor slab with a thickness ranging from 45 to 55 cm and formed by B. Wassermann Bauunternehmung using AluFix formwork serves as the base. The lightweight and nevertheless robust hand-set formwork is the ideal choice here, as this project involves hardly any long walls or floor slab formwork with large surface areas. The formwork on the ground was created without any problems using 55 cm wide panels, used horizontally, and the practical brace bracket 80 from MEVA.

AluFix proved its worth straightaway and demonstrated that it is very well suited for the creation of floor slabs with difficult geometries. The system can be set quickly and efficiently, and safely carried by hand even when there isn’t a lot of room,” reports construction manager Daniel Christ. During the project in Kempten the panels are also being used to manufacture the concrete beams and the parapet walls.

Tied from one side using XT formwork
The high-performance XT wall formwork systems were also used without a hitch by Daniel Christ’s team. The large-format Mammut XT played to its strengths, among other things during single-sided tying while constructing the 3.30 m high basement walls. Using 2.70 m high StarTec XT panels, B. Wassermann Bauunternehmung created columns, among other things. The combination tie hole fully integrated into the frame in both XT formwork systems combines three tying methods in one system and allows flexible switching between conventional and single-sided tying with a flick of the wrist without additional parts or additional assembly. This enables the user to achieve significantly shorter formwork times than would be the case using comparable systems.

As the entire building structure was split into two construction phases, an exceedingly high falling edge was created at the building separation joint during the first construction phase. It was not possible to secure this edge, as work had already started on the second construction phase as the construction work on the first phase progressed. The LAB working platforms, which wandered upwards floor by floor, provided the solution to enable the work to be performed safely.