Yes, when sitting on the tramp, there should be hiking straps. If your jib sheet wires are above the tramp, just add padding and use these, they are made of wire and very strong. Unless they're made of line. Either way, you'll need the padding.
If they're under the tramp (preferred), then you'll need some kind of hiking strap on top. Next time you take the boat apart, take the tramp to sailmaker & have them sew on some hiking straps. Both sides, front to back, one point in middle, with strap rotated 1/2 turn between sew-down points (makes it easier to shove foot into without reaching down. You might want to mark positions prior to removing tramp.