Concepts and examples from practice

Water-impermeable, loadbearing and non-loadbearing ground slabs in underground garages

In the past, structural engineers used primarily standard concepts for designing water-impermeable ground slabs based on design principle b) of the DAfStb code of practice on water-impermeable concrete structures (WU code). The aim of this design principle is to reduce the separating cracks, expected due to restraint stresses, to such narrow widths as to enable them to heal themselves. The cracks that occurred due to the design concept, however, present a risk to the serviceability and durability of underground garages subjected to high-quality utilization or chloride ingress.

The “WU code”...

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Issue 2018-02 Implementation examples of WP constructions

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Issue 2014-02 On early and late restraint stresses

Designing cracks properly

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Issue 2018-02 The new DafStb WP Code of Practice:

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Issue 2015-02 Current execution recommendations

Further development and modification of the regulatory framework for parking decks

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Issue 2021-02

Cracking behavior of reinforced-concrete elements with multiple-layer reinforced cross sections when using large bar diameters

The formation of cracks is an inherent feature of reinforced-concrete construction. The width of any cracks occurring needs to be limited to a non-detrimental extent, however, in order to permanently...