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Geosynthetic soil reinforcement materials employed in the reinforcement of soil structures (embankments, slopes, reinforced soil walls, etc) are materials with widely varying properties. Some geosynthetic materials have a relatively limited history of application and proven performance.

Where geosynthetic soil reinforcement is proposed to be used, the specific geosynthetic reinforcement material and supplier shall be subject to the approval of the road controlling authority.

Based upon submitted product information, testing results, and certification, Waka Kotahi accepts the following geosynthetics for use as soil reinforcement in accordance with Section 6 of the Waka Kotahi Bridge manual.

Note these acceptances apply only to the geosynthetics and not to any facings or connections, and only for products manufactured at the manufacturing facility stated on the Waka Kotahi approval certificate.

Both the manufacturing plant ISO certification and Waka Kotahi certificate dates need to be current at the time of use.

Design parameters given in the Waka Kotahi approval certificates shall be adopted in design.

Related guidance
Bridge manual (SM061)