Review on Aluminum Medium Duty Storage Shelving With Dual Post Design And Press Board Shelves - 48 X 18 X 72 Inches By Amazon Basics by Chris Endricko

I purchased this to make a cat tower for my screened in patio. The metal frame is easily assembled with a rubber mallet and the frame is quite sturdy and looks much nicer than what you'd find at a big box store. I cut up some Ikea wooden bed slats that I had on hand and used them as the bottom shelf. Unlike the cheeze-ball MDF shelves that come with the unit, the bed slats are easily able to hold the heavy bins of tile I used to weigh the unit down and prevent those fat cat asses from toppling the whole thing over. The MDF shelves as I said are garbage - barely 3/8" thick and warp easily. To build the landings at each level I cut each shelf in half and alternated the half shelves so the cats could climb to the top. The remaining halves I stored with my plywood stash. After a few months, I noticed the shelves on the patio were getting really moldy - not surprising with Florida's humidity. But when I pulled out the halves that I'd put away - they too were covered in mold. Yuck! I just chucked the MDF that came with the shelves and cut new landing shelves from my scrap plywood. All in all the shelving frame is great but plan on replacing the original MDF shelves with something that can support some amount of weight and not turn into a petri dish.