How to you build a rail that you can grind with a snowboard?

I reccently found a 12 foot metal pole/ rod buried in my back yard. I'd really like to make a rail out of it. I think I have all the materials to make it- I have: the rod, ton's of wood, wax, and of coarse all my boarding gear. I've snowboarded 6 years- experience with grinding isn't a probleme. Another thing- I'd like to try it out and use it untill the season starts- any suggestions on how to use it with no snow?