You'll notice, my box has no bottom, this was because I was sitting it on the floor, and had no need for one, and it was simpler to make without it, and with no bottom, no dirt collects in there.
Step 1: Supplies
angle iron (1"x1")
1x5 board (get the nicest looking one you can find)
stain (I used dark walnut)
Polyurethane (I used a water base, high gloss)
Black spray paint (I used gloss black Pitbull, a paint much the same as Rustoleum)
copper tacks (I went with ones that were 1" long)
glue (I used liquid nails, but it doesn't matter much)
Saw (I used a bandsaw, butyou can use a hack saw, chop saw, angle grinder with cutting disc, etc.)
Welding equipment (I used my o/a torch, but any would work as long as you can use it decently)
Sander, for stripping the scale and rust off the angle iron. (I used an angle grinder)
Various other things - hammer, C clamps, pliers, drill bits, marking tools (scribe, sharpie, etc.), wirebrush, etc.
Step 2: Prepping the Angle Iron.
Then you cut out all the pieces you need. 4 -14" peices, 4-12" pieces, then 4 uprights, you'll need to cut these to size depending on your wood, I used a 1x6, but my uprights needed to be just under 4" for the board length.
Now you cut notches on each piece (except the uprights). You need one notch on each piece, put all the notches on the same side of each piece.
Lastly, you take your sander and clean the scale off the angle iron, clean steel welds better.
Step 3: Welding the Frames
Step 4: Welding the Box
Once again, make sure everything is straight, then weld the joints. I only welded on the outside, I didn't really need to weld on the inside of the joints as the box won't take much strain.
Step 5: Last Steps for the Metal Frame
Step 6: Prepping the Wood
The way I made my boards fit into the frame, you put one in, and there is a space on one side (hidden by the angle iron) that the next board will slide into. The problem, when you hit the last board, it doesn't want to fit. So you need to bevel one side of the last board. When beveled correctly, it will fit in tightly, just needs a few smacks to fit it in.
Step 7: Wood Finishing
Then, to finish it off, I gave each board 3-4 coats of highgloss polyurethane.