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How to: Crane foundation in concrete floor slab

How to: Crane foundation in concrete floor slab

In larger building projects, crane foundations are integrated directly into the floor slab and are the first areas to be concreted. This stage is extremely important for the construction, because the crane plays an instrumental role on the building site. Stremaform® concrete jointing formwork enables the working joints in the crane foundation to be created quickly, securely and with a force-locked connection. As standard, the Stremaform® working joint can also be prefabricated with integrated waterproofing materials and sealed against groundwater

How to:

  • Lay the lower reinforcement on suitable spacers with a predetermined overlap length relative to the floor slab.
  • Place Stremaform® spacers (fibre concrete rails with integrated expanded metal strips) in the edge area under the Stremaform® units. This minimises leakage of the concrete slurry in the area of the concrete cover and reinforcement during concreting.
  • Position the prefabricated Stremaform® sections and tie them with wire to the adjacent units and the lower reinforcement layer.
  • Lay the upper reinforcement layer with overlength according to the necessary overlap length.
  • Lay a wooden strip over the elements with a thickness corresponding to the top-side concrete cover.
  • Concrete the crane foundations.
  • Erect the crane with suitable anchoring to the crane foundation. The further floor slabs can now be prepared and concreted with the use of the crane.


March 2020

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+49(0) 9427 189-0

Max Frank GmbH & Co. KG
Mitterweg 1
94339 Leiblfing
Germany