Stop in for a cup of coffee

Here's the shelves that we are working on that I mentioned the other day:

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Here they are with 6 engine cradles that I just built to hold the engines stable while being stored:

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I have to load the bottom shelf first, then set up the top shelf for some more. Now we have to get the engines moved...

Do you have anything under the plywood? Looks like regular 2 wide pallet rack. Unless you have steel under the ply, i would put 2 pallets on there. Just screw blocks under them so they can't slide, and lay the plyboard on them.