Rack Question

[Knytemare]

So i went to menards and i saw some wood pretty great selection for pretty cheap least compared to home depot. Anyways before i start buying wood i need the measurments and all and i was on Royal Constrictors designs.com and i saw this: http://www.royalconstrictordesigns.c...ages-medium--3
Now he says 28 Qt tubs, but towards the bottom he says the common measures of, 22"x16"x6. but the 28 qt tubs at walmart are 23.12"L x 16.9"W x 6.38"H
so now would his design fit the measurments of walmarts 28qts? I really dont know much about building and measuring much with wood and i dont wanna buy alot and cut and find out its not right.

[llovelace]

He was probably using the sterlite 28 qt tubs, those are about the measurements of my rack openings.

[Knytemare]

hmm so ill be fine buying walmarts 28 qts then?

[llovelace]

Yes the sterlites without the locking lids

[Knytemare]

What would be the best way to have the heat tape with it, on the back?