Step 1: Choose/Create Your Design
I thought this design would provide a challenge, while still maintaining an easy enough build. It also provides and interesting look and feel to the shelf.
Step 2: Gather Materials + Tools
Cardboard! I used some I found on an old cardboard box lid, the kind with the removable lid. If you "use every part of the buffalo" you won't need too much cardboard.
(Like I said, this is a very "achievable" build)
X-Acto Knife/Utility Knife
Elmers Glue and/or Hot Glue. When I built my shelf, I didn't think to use hot glue, and I got away with using Elmers Glue. However, looking back, I probably should have used a bit of hot glue as well.
Step 3: Start Cutting Cardboard!
A total of 14 in. long
A width of 1 and 1/8 in.
An inner "V" length of 2.5 in.
A "V" angle of about 125 Degrees
(If you're having any trouble with the dimensions, see the photo tags below. Also, if that doesn't help, step 5 may clear things up.)
To conserve space on my small sheet of cardboard, I drew out, then cut, the pieces so that the outer edge of the V snugly contacted the inner edge of the next V . (In the photo below, picture the top piece and the middle piece fitting snugly together to conserve space.) This resulted in the movement of each piece over a few sixteenths of an inch each time, but nothing I couldn't handle.
Step 4: Cut the Squares!
Step 5: Cut More Cardboard!
A . 1 and 1/8 in . X 3 in . piece
B . 11 and 1/2 in. X 3 in . piece
C . 4 and 1/2in . X 3 in . piece
D . Another 1 and 1/8 in . X 3 in . piece (same as A)
E . 1 and 3/4in . X 3 in . piece
F . 3 in . X 3 in . square piece
G . 3 in . X 3 in . square piece (same as F)
H . 8 and 3/4 in. X 3 in. piece
Above, I've listed the eight rectangular pieces, each with a letter accompanying them. These letters correspond with the photo below.
Remember: Your shelf may be slightly different than mine, and it will most likely require you to trim the pieces down to fit your exact shelf size. However, if you are sticking to this Instructable and not altering or modifying the design at all, these dimensions will not need as much tweaking.
Step 6: Create the Pegs!
To begin, you will need to cut out three pieces of cardboard for each peg. This means you will cut out a total of nine pieces for the three pegs. Use the dimensions found in the photos below.
Once you have cut out all nine pieces, you will assemble the pegs by gluing three pieces together for each peg. Assuming your cardboard is roughly 1/8 in. thick, you will have a square peg. See the photos below for help.
Remember: To create one peg, you will need three pieces of the same shape and size.
Step 7: Assemble the Shelf!
First, the six to eight original pieces of cardboard we cut out in Step 3 will be lined up on edge. Next, the pegs can be inserted into the pieces. Try to evenly space the sections made in Step 3 across the pegs. After this, the shelf should be coming together quite well. Next, glue the main rectangles in Step 5 in their appropriate places along the edges of the sections made in Step 3. If you need to visualize this, check out the photo on Step 5. It will show you where each rectangular piece will go. Remember that the pieces B and C will need to be creased where they enter the V .
Once you have completed this step, you are basically done! In Step 8 we'll cover up some seams (optional) and in Step 9 we'll hang it.
The photos below will help a lot, make sure you check them out.
Step 8: Cover Up the Seams! (Optional Step)
Step 9: Hang Your Shelf! + Finish!
To hang my shelf, I used a highly sophisticated method of epicness, by which I mean, "I have no former experience in hanging a shelf of any kind, and thus used a system of nailing around one dozen finishing nails (without large nail heads) to securely hold that puppy to the wall." So essentially what I did was to place a nail in every strategic place I could come up with, mostly including the corners of the shelf. This method turned out to be quite useful. In fact, the shelf felt as sturdy as any ordinary shelf would if it was held to the wall with only a few nails.
I hope this Instructable provided you with enough info to successfully make your own. This was my first Instructable, so it may have lacked the epic intelligence which can surely be found in any of the senior Instructable masters' how-tos... If you end up making a cardboard shelf, be sure to post a picture below in the comments.
If anyone sees any errors in this Instructable, be sure to point them out in the comments, be they grammatical or other, I want this Instructable to be the best it can, and your feed back helps. Also, if you don't understand a step or instruction, just ask in the comments, I may be able to help. Good luck!