Drcj, I just today completed a set of shelves based upon this instructable. I used wood on hand (1x2s) for the side and center supports and 2x4s for the rest of the structure. I also departed from your plans, making a 5-shelf unit instead of the 4-shelf unit featured.



As a novice woodworker, here are some things I've learned in the process of doing this project -

(1) You can never have enough clamps!

(2) Take the time to line up everything square and level, especially when assembling the two side "ladders." I didn't , and had to re-attach 8 of the 10 side supports.



The unit looks great at our hackerspace. It's already full of stuff! I'll need to make another set.