European product standard or German approval?

Erection state of lattice-girder floors

Lattice girders in floor plates for floor systems in the erection state of prefabricated reinforced-concrete slabs ensure their flexural strength and shear resistance as well as their bending stiffness. Application and design rules used to determine permissible erection spans are found in both the German national approvals for lattice girders and in product standard EN 13747 (1) for floor slabs with in-situ concrete topping. The regulations differ and result in different permissible erection spans and different safety levels.
EN 13747 had already become a binding requirement years ago. In...

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