In 2009. the European Guideline for Flexible Rockfall Protection Kits European Technical Approval Guideline 027 (ETAG 027) became valid. The aim of the guideline was to approve and certify steel barriers available on the market according to a common standard. In 2018. https://www.diegojavierfares.com/super-grab-Fruity-Germander-super-save/