120mm Dia. U-Groove Wheel

The gate will run along the pre-formed zinc plated track, the top of the track is shaped like a U so it will run perfectly along this edge.

If you have lots of heavy traffic it may be a good idea to support the track in some way or support the weight of the vehicles passing over it. An extreme example would be to cut a channel in the floor so that the top of the track is flush with the road surface. The full weight of the vehicles will never reach the track.