Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: Could I put a second (or third) shelf at any height, or are there fixed heights for shelves? If they're fixed, how many are there?
Document: I also left out the middle shelf in order to have more room for large things beneath, like tubs and power tools.The instructions are clear enough, though there does seem to be a little confusion regarding how many screws get screwed in at some points (or more like they're getting taken out and put back in, which doesn't happen).
I'm really happy with these. I built 3 workbenches with them, adapting each one to my specific needs such as a half middle shelf for more height and a split middle shelf to allow my legs to slide under. I used 3/4&#34; plywood for the shelfs and I can walk on these units without any hesitation (I'm about 210 lbs.)
In case you want to know, it was $74 for the wood. I used a plastic miter box and saw to miter the ends of the cross-corner support beam for the top shelf (see pix). I will use the remainder of the plywood to make shelving using the same manufacturer kits for shelves. Do not hesitate.
Yes, I could have built a workbench legs totally out of 2x4's and metal brackets for the shelves, but I'm not sure it would be as sturdy as this beast is, plus my time is worth something. This is a no-brainer deal: cut the material and assemble.My only question was what to use for the sheeting material, since plywood is getting pricy. Ended up using particle board as much as I dislike it - since I am indoors it shouldn't be a problem.
The composite legs are stronger than expected and the kit was designed for an easy to put together for an average person. You can build better and stronger workbenches than this, but this workbench is stable and strong enough to withstand some pretty intense jobs without going overboard on labor and price. I just used 3/4 inch plywood for the top and bottom shelf and did not install a middle shelf or front bracket so that I can easily pull a stool up and work without hitting my legs.
The instructions show the bottom 2x4's being supported on other 2x4s during assembly, but you need a little more height than a 2x4 to hold them level while you are trying to screw them into the legs. Once I got everything together, I was pleased with my workbench, but the instructions need to be clearer and more detailed.
I built my bench 30" x 8' with 2 shelves and it is incredibly sturdy. Great value and easy to build.
Easy to put together and very strong. I love that you can make it any size that you need. I have two of these so far.
Took my father and I minutes to put together a sturdy, flat, workbench with minimal cutting. Just made everything with standard stock.
This makes building a custom sized work bench very easy.It went together well and I was able to make it just the right size for the space I intended to put it in.
Answer: no