[atpands]

Hi Andy. The deck or platform is typically made of pressed wood. It is very dense and sturdy. Frankly, it has to be to support running weight. As far as replacement goes, if you are able to get dimensions, you can contact Glide Fitness in Santa Ana, CA. They have been able to fabricate like decks for me. I have only dealt with commercial products with them, so residential style may be more daunting. You can find them on the Internet. Ask for Edgar. He is very knowledgeable.