Are you ready for the second generation of Eurocodes?

Date: 
Thursday, 20 January, 2022
Region: 
International

Eurocodes Although the intentions of uniformity are there, we can agree that Europe is still much of a patchwork of different regulations and systems. The construction industry was no exception to that, until the Eurocodes were introduced. With the first generation of Eurocodes, the European Union has put in place a comprehensive legislative and regulatory framework for the construction sector. 20 years later, the time has come for a major update: the second generation.   

Back in 1975, the first steps of the Eurocodes were being made with the objective of eliminating technical obstacles to trade and the harmonisation of technical specifications by means of technical rules. Initially, they would serve as an alternative to the national rules in force in the different countries and, ultimately, the Eurocodes would replace them. 

As a means to prove compliance of building and civil engineering works, the EN Eurocodes include 10 standards (EN 1990 - 1999), each of them divided into a number of parts. In total there are 58 EN Eurocode parts distributed in the 10 Eurocodes. 

Eurocodes
Picture 1: the structure of the first generation of Eurocodes 

As can be expected for such an extensive reference work, the creation of it doesn’t happen overnight. The following timeline gives an idea of the mechanism that is behind the preparation of the Eurocodes: 

  • A project team works on a Eurocode and sends a final draft to the subcommittee. 
  • During the examination period, the subcommittee gets the chance to examine the content of the Eurocode part.  
  • After receiving the final draft, CEN (Comité Européen de Normalisation or European Standardisation Organisation) organises the formal vote and the ratification, leading to the Date of Availability of the approved European standard (CEN process period). 
  • The National Standardisation Body (NSB) starts the translation of a Eurocode Part. 
  • National calibration period: The Member State should fix the Nationally Determined Parameters (NDP) within a period of two years after DAV (Date of Availability) at maximum. At the end of this period, the national version of an EN Eurocode Part will be published by the NSB, with the National Annex.  
  • During the coexistence period, which starts at the end of the National Calibration period, the Eurocode Part can be used, just as the former national system can also be used. The coexistence period of a Eurocode Package will last up to a maximum time of three years after the national publication of the last Part of a Package. 

The ambitious Eurocodes project has clearly borne fruit: it is estimated that over 500,000 professional engineers in Europe and even across the globe have used the design standards. However, the construction industry evolves and so do the Eurocodes. In order to keep up with new methods, new materials, new regulatory requirements and new societal needs, a sustained development of the Eurocodes is necessary. Hence the decision of the European Commission in December 2012 to mandate the development of the 2nd  generation Eurocodes to CEN. 

The main goals of the second generation of Eurocodes are the following: 

  • Enhance ease-of-use  
  • Incorporate new design, performance and robustness requirements 
  • Reduce the number of nationally determined parameters (NDPs) 
  • Develop a number of new Eurocodes parts to provide guidance on: 
    • Assessment and retrofitting of existing structures 
    • Structural glass 
    • Actions on structures due to atmospheric icing, waves and currents 

Eurocodes
Picture 2: the structure of the second generation of Eurocodes 

So where are we now? The project teams finished the drafting of the second generation of Eurocodes in 2021. In 2026, the last standards should be made available to NSBs so that in 2028 the first generation can be entirely and officially replaced by the second generation. prEN 1993-1-1:2020 Eurocode 3: Design of steel structures – Part 1-1: General rules and rules for buildings, for example, was made available as a draft in September 2020 as the first one of Eurocode 3. Drafts of a completely new Eurocode, Eurocode 11 for Structural Glass, will be issued in 2023. The goal is to have the last standards made available to NSBs in 2023.  

In the same way that the first generation of Eurocodes shaped the building industry as we knew it two decades ago, the second generation will surely define our way of constructing for the next 20 years. As the number one structural analysis software in Europe, SCIA was a frontrunner in implementing the first generation of Eurocodes (including numerous important National Annexes) in SCIA Engineer and will also take up this pioneering role for the second generation of Eurocodes.  

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