Ok this is a weird one I use those rolling carts like you see in kitchens for my shops tables. The shelves can take 600lbs each and they are very inexpensive. They have for me passed the test of time in my metal working shop. I simply cut some 1/4 inch sheet to the size of the tops and lay it down in there then tack weld them in a few spots and viola instant portable strong shop table.
You can buy one tall one and cut it in half . you get to have three selves on each and in any configuration you like,and here is the best part I made an adjustable extension so my cutting saw is at the same level as the table,so when I have twenty foot stock delivered I can cut it my self, (no extra cutting charge) those five dollar cutting charges add up fast. In my small shop it is all about footprint if I can get a tool in here that does not take up more precious square footage that's what I want. The real trick with these shelves is that the poles that come with these shelves can be sleeved with 1-1/4 x.095 wall DOM tubing and then those fit inside 1.5 inch .125 wall square tubing and you can see what I have done with that. The sleeves over the poles is what makes them so easily adjustable up and down. I now have two tables with the extensions placed so that they are both in the middle so I have support on both sides of the stock with either saw if I need it. I lined them both up so I can use either one without interference.
Here are more pictures.
The dimensions are easily obtainable when you get your shelves. I don't give the dimensions for obvious reasons. My shelves are 18" by four foot, but these shelves come in a myriad of sizes. The poles are mostly all the same though. Mine are 1 inch so for that size the tubes/sleeves are 1-1/4 x.095 wall DOM and the square tube is1-1/2 x .125 wall. The weld on the inside of the square tube will give you an interference/press fit but just wack it with a small sledge and it will slip right on. Leave a bit of tube above the square so you can cut/grind off any that gets banged up with the hammer.
I hope this helps somebody to make their shop a bit more efficient as it has mine. oh and the adjustable bit is simply a piece of square tube with a nut welded in it and a bolt to make is longer or shorter. It goes between the lower cross member of the extension and the next shelve. Use a piece of flat bar laid out across the shelf as shown, or use some angle iron as I did. Remember cold coffee is a sign of $@*! getting done
one more thing you will notice that the coolant pan that the band saw is sitting in is tilted a bit. I used two bolts on the outside corners of the extension with the nuts welded inside the square tube so that I could adjust the angle of both the band saw and the coolant pan as well, and keep the whole thing flat and level with the table.