Retaining Wall Engineering Redi-Rock engineering assistance is available through Lahman or Redi-Rock. In addition, you can use Redi-Rock's engineering CD to simplify wall design. The user-friendly CD has specific construction details, blocks in AutoCad Format and the complete Redi-Rock Design Resources book. It also includes geo-grid charts with over 200 details and backup calculations for high wall projects that require geo-grid. More egineering info…