I was thinking about building a rack out of melamine that will house ten 15 qt. tubs. Two side by side and five tall. The tubs are 10 3/4" wide x 16 3/4" long, so the shelves would have to be around 21 3/4" x 17". Do you think there would be any chance of warping with this size? And, is there any benefit to keeping the lids on?

Thanks,

Dave