Standard NEN 9997-1:2016 has been published and available from NEN since June. NEN 9997-1 is the geotechnical standard merging NEN-EN 1997-1 (Eurocode 7, part 1), correction sheet C1:2009 and amendment sheet A1:2013 and the corresponding National Annex. The main change is the adjustment of the pile class factors for the pile tip (ap). These have been reduced by 30% for all pile types compared to the previous version of the 2012 standard. The standard will be designated by the Buildings Decree from 1 January 2017.

The main changes in the new NEN 9997-1 are:

  • table 7.c with the values for the pile class factors has been updated;
  • the translated text of the amendment sheet NEN-EN 1997-1:2005/A1:2013 (en) has been added;
  • the national annex has been adapted to the amendment sheet and the latest insights.

Anchors

The amendments following NEN-EN 1997-1:2005/A1:2013 mainly concern the topic 'Anchors'. An entirely new Chapter 8 in the standard has appeared on this subject. For the design of anchors in the Netherlands with the adapted standard, reference is made, among others, to the article by R. Schippers et al. in Geotechniek - April 2016.

The adaptation of table 7c with the pile class factors concerns the reduction of the factors for the pile tip (αp) for all pile types by 30 %. The other pile class factors (αs and αt) are not reduced.

Further information

For orders, visit the Standards Shop or contact NEN Customer Service, telephone (015) 2 690 391 or e-mail bestel@nen.nl. For more information about this standard or about the standardisation process: Isabel Polderdijk, consultant Materials & Building Products, telephone (015) 2 690 442 e-mail mb@nen.nl.

Participate in the content of standards

Would you, as an interested party, like to participate in the development of standards in this field? The standards committee 'Geotechnics', deals with testing the design of geotechnical and foundation structures, geotechnical soil investigation (including soundings) and description and classification of soil for civil engineering and construction applications. An emerging area of work is geohydrological and geothermal testing and implementation standards. To join or learn more about this committee, send an email to mb@nen.nl.