possible snake rack

[jesst]

I was wondering if anyone has ever use some of these shelving units for racks? they seem adjustable i was just wondering about the wood shelves and what type of heat source you could use? i was going to use 67 qt tubs and put marker board on the back and side to keep in the heat

http://www.lowes.com/pd_101933-1281-...7C1&facetInfo=

or i was going to use these but was hoping i could it something a little wider

http://www.lowes.com/ProductDisplay?...llow&cId=PDIO1