Front and side shelves made of 7 / 16 - inch hard chrome round bar steel are standard. (fieryfoodscentral.com)
Drawing # 2 allowed for the framing issues but, it would involve more complicated side shelves that would have cut outs to slide back behind the stud frames. (thediyvillage.com)
I don't think it would be too hard to get rid of those silly one sided shelves? (theinspiredroom.net)