RTA Tie Grading Guide Mobile App 

The RTA interactive Tie Grading Guide Mobile App features specifications, defect explanations and real-life examples of Grade, IG, and Cull ties, along with tie grading videos. Users can interact with instructors via email and view dozens of pictures. A handy tie defect guide to learn how to grade ties is now available for your smart device, ad-free!

Search your App Store for the Tie Grading Guide.