Independent Keystone Test Evaluations

ICC-ES Evaluation

Keystone Retaining Wall Systems LLC has received confirmation from ICC Evaluation Service, LLC (ICC-ES), that its Keystone Retaining Wall System complies with the provisions of the 2009/2012/2015/2018 International Building (IBC) and Residential (IRC) Codes and the 2019 California Building (CBC) and Residential (CRC) Codes. The ICC-ES confirmation, published in evaluation report ESR-2113, will help code officials approve use of Keystone products under the codes. The Keystone evaluation report is available online at


Federal Highway Administration IDEA Evaluation

Minneapolis, MN, February 26, 2020 — The Federal Highway Administration’s (FHWA) Highway Innovations, Developments, Enhancements and Advancements (IDEA) program has evaluated the Keystone KeySystem Compac III retaining wall system and found it in compliance with the current AASHTO LRFD specifications. The application implications of the evaluation relate to it being qualified for use on highway projects across the country for walls up to 50 feet in height.