a few bridge questions

[Bigsteel]

hey everyone,i have a few bridge questions for ya'.right now im building a small part of my logging layout and im finishing the trestles and bridges so i can lay track.i have a walthers truss brudge and was wondering,did they mix truss bridges with trestles? i have a small river/waterfall to span and id like to use what i have on hand.and if they did use them,in what manner would they attach the bridge? right now i have the deck just sitting on top of the pilings.and finally,did they ever curve track on a straight bridge?,as in was there an extra wide bridge to accomodate a curve?--josh