Home » Case Studies » DIY Ground Screw – Millboard DuoSpanDIY Ground Screw – Millboard DuoSpan Our Client, Jan From ATG Landscapers, Contacted Us With A Request To Use Our Self-Installation Ground Screws For This Amazing Installation, Using Millboard Duo Span Joists And Decking.After discussing Jan’s needs and project plans, we offered guidance and assistance regarding our product and its installation procedure. Thanks to the collaboration between our teams, ATG Landscapers successfully created an impressive decking area for their client, eliminating the necessity for traditional hole digging or concrete usage.