How do tie rods attach to a structure?
Tie rods are attached by sliding a gusset plate or knife plate, which is fastened to a structure, in between the ears of a clevis. A clevis pin or A325 structural bolt, is then assembled through the pin holes on the clevis and through the hole in the plate.
A clevis is threaded onto either end of an externally threaded rod to form a tie rod assembly. These parts function as a tension rod because at one end, a clevis threads onto left hand threads and on the other end a clevis threads onto right hand threads. These opposite threaded ends allow the tie rod to be tightened or loosened by turning the rod in the middle.