What are standard base/backfill requirements?

Minimum base requirements are covered in question #1. Backfill requirements can vary by project. But under ideal site conditions, typical backfill will consist of clean, angular aggregate, in accordance with ASTM #57 standards. This aggregate will extend a minimum of twelve inches behind the wall, and will be separated from the retained soil by a non-woven geotextile fabric. For specific details, download our Technical Guide.