Precast Concrete Structures by Hubert Bachmann, Alfred Steinle



Preface

Building with precast concrete components is as old as building with concrete itself. It

was only in the second half of the last century, however, that this form of construction

took on its industrialised form. Factors that contributed to this were, in particular, the development

of heavy lifting equipment, the use of mechanised steel moulds and, more recently,

automated manufacturing systems, for suspended floor elements especially.

This work on precast concrete construction was first published in 1988 as part of the

Beton-Kalender.



A second version by the authors Alfred Steinle and Volker Hahn appeared

in the same publication in 1995. These essays were turned into a book which was published

in 1998 as part of the Bauingenieur-Praxis series of the Ernst & Sohn publishing

house. A further treatise appeared in the 2009 edition of the

Beton-Kalender, this time

with Hubert Bachmann joining the original authors, and it was that version that became

the second edition of the book in German.


Inevitably, there have been some changes to the standards over the past 10 years. For

example, the publication, following a long period of preparation, of the new DIN 1045

“Concrete, reinforced and prestressed concrete structures”.



This standard has been approved by the building authorities for use in the Federal Republic

of Germany since September 2002 and since 1 January 2005 is the only standard that

may be used for concrete works. It was drawn up on the basis of the Euronorm EN 1992-1

“Design of concrete structures” (previously known as Eurocode 2) and therefore represents

the translation of this Euronorm into national German practice.



Furthermore, we are witnessing a fundamental change in the design of precast concrete

components.

The creation of the European Single Market led to the publication of the Construction

Products Directive, which has been in force in Germany in the form of the Construction

Products Act (

Bauproduktengesetz) since 1992 and in the meantime has become part of

the building regulations of the federal states which were revised to take account of this legislation.

The directive renders it necessary to establish harmonised product standards

specifically for the various precast concrete products so that in the end it will be possible

to use all such components – labelled with the CE marking – throughout the European

Union.


With modern methods of construction making use of industrial methods of manufacture,

which includes construction with factory-precast concrete components, the design of the

individual elements, and also the entire structure, is heavily influenced by the factory production.

On the manufacturing side, the growing trend towards mechanisation and automation

in production is evident.


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