I've seen those or shelving looking very similar. They look industrial strength and according to the specs should easily handle the weight of the full carboys that can fit on the shelving. I wonder how many carboys would fit on one unit?That is literally a ton of wine. I wouldn't build that out of wood. Invest in some metal shelving. Not saying to buy this but this is the style you should be looking at.
http://www.homedepot.com/p/Gladiator-4-Shelf-60-in-W-x-72-in-H-x-18-in-D-Welded-Steel-Garage-Shelving-Unit-GARS604TEG/206688384?cm_mmc=Shopping|THD|google|&mid=seeCOgiB7|dt_mtid_8903rn225192_pcrid_171990442072_pkw__pmt__product_206688384_slid_&gclid=CJHwza6sz9ICFUeHswodK3UJAQ
This is storage for 14, yours would need to be doubled. I've switched to vented bungs instead of airlocks which would have reduced the vertical spacing, but you get the idea.......Wondered if anyone had any pictures of shelving they have made to store full 6 gallon carboys? I'm needing to make some storage to store approximately 25-30, 6 gallon carboys, full. Any pics would help. Thx.