Unfortunately, I am not at home so I can’t check, but be aware that the Fastrack elevated system comes with metal spacing bars - not sure of their exact length - which kind of determine the spacing of the trestles. I use them on an elevated section of one of my main lines which uses O-72 curves... the metal bars do not allow you to place one at each joint on the curves, but they still work. Hopefully, this pic gives you a general idea of the appearance.
