I don't think you can put them on their sides as they have lag bolts in them for trans. We bought one last year. $800 POS. Shakes like a Harley. Put too much in it ,it shakes, put too little in it, it shakes. Total POS. Gonna sell it and get a top loader. Did i say POS? Actually takes longer to do a load so you don't save a dime of energy. POS!