Standard formwork cleverly doubled up

School building built to exacting architectural-concrete requirements

The clean architecture of the flat-roofed building with a ground floor and a smaller second floor is characterised by extensive architectural-concrete surfaces. According to the specification, the surface finish of all walls was to be in superior SB2 architectural-concrete quality. SB3 quality was required in all corridors and several rooms. To the delight of all parties involved in the project as well as the principle, the results met the requirements of SB3 quality everywhere and in same places even those of SB4.

The construction company Otto Reischl GmbH mastered the challenge with the help of the high-performance wall formwork system Mammut 350 and elaborate preparation on the part of MEVA. To achieve this, exact planning of the cycles and special doubling-up of the formwork panels were required. A further success factor during this challenging project was the just-in-time delivery of the material.

Using Mammut 350, all requirements were fulfilled – even in areas where walls needed to be poured over two storeys in a single cycle without construction joints, e.g. in the stairwell.

The special doubling-up of the standard frame formwork was performed by the personnel on the construction site. High-quality 21 mm thick birch plywood facings were cut to size in a large number of different widths and heights up to 360 cm and the edges sealed. They were then mounted on the frames and on the alkus all-plastic facings of the panels with a height up to 350 cm. By employing a clever trick – the facing was offset relative to the panel joint – it was possible to produce an optimum joint and tie hole pattern with symmetrical tie holes in order to meet the demanding architectural requirements. The plywood panels were secured from the rear through the alkus facing using screws. This was no problem for the material, as it was possible to easily repair the alkus facings afterwards using the same material.

MEVA delivered the formwork as part of its MietePlus package. Besides rental equipment and logistics, this also includes all other services such as cleaning and repairs. The construction company thus enjoys costing certainty right from the start. MEVA was also responsible for planning the formwork and the pouring cycles required to meet the architectural-concrete requirements.

MEVA systems:

• Mammut 350 wall formwork
• Special formwork

Project:
New school building, Kirchheim near Munich, Germany

Contractor:
Otto Reischl GmbH, Dachau, Germany

Engineering and support:
MEVA Schalungs-Systeme GmbH, Munich office, Germany