Any suggesting of which cheap shelving to use for snake rack?

[Creepy Alien]

On the other hand if you look at freedombreeders (one ofthe best racks)its the same thing (heat sink)

I have a Freedom Breeder 1030. The heat tape is under a metal section that fits in the back of the rack, stretching across each level. I believe that it attaches to the main rack sections with velcro (so it doesn't turn the rest of the metal into a giant heat sink as the metal sections that house the heat tape aren't directly touching the other metal). I believe that there is some kind of insulation as well.