We got a great TRESTON LAB workbench for free. It is 60x18. It looks like the attachment (metal workbench 1). I want to build a cabinet underneath the top. I need drawers (see a whole wood version in attachment 2). The structure will be a very long box with partitions for the drawers. However I have concerns about sagging. I have a couple of ideas to uses metal braces and 2x4 to support the big box but it is quite hard to find straight 2x4 in my HD. I though I would post to see if somebody has a better idea or has ever done anything similar. Thanks for helping