nails to the side of it, or what i did, i attached it on the top of my ramp, to the platform, so if you stand on the edge of platform/ramp you have a small woodstrip nailed into the platform that holds the fence and the turf into place....
so its layered, top down, small wood plank, fence, turf, and then all that hammered into the top of my platform with nails, the nails smashed into the wood so they don't stick out and scratch the skis