here's the ROAR rule book http://www.roarracing.com/downloads/..._Rule_Book.pdf. section 2 gives track specs. they dont specify hight if drivers stand, probably because of building codes. from what i've seen, having the floor of the stand about 5-6 feet higher then the front straight is a sufficient minimum height. 8-10 feet wouldnt hurt if you plan on a large track.