FTN typical drawing (D&D)
DR FTN (D&D) 052
Route Support (Typical Design)
Issue 2 · FTN D&D specs & typical drawings
What the drawing shows
Two ways of supporting troughing on a bank or hard shoulder: angle-iron posts (sheet 1) and concrete ballast boards with posts (sheet 2).
Typical drawings are a starting point: the project design, the site survey and the current standards decide what is actually built.