# Paper Tower

1. Jan 26, 2008

### bibliophile

I have to build a tower in class that supports at least three textbooks.

Materials
2 pieces of regular printer paper

Specifics
Must be at least 4" tall
Cannot crumple

I've been working all day trying to figure it out...any help would be welcomed

2. Jan 26, 2008

### bibliophile

Anyone?

3. Jan 26, 2008

### _Mayday_

Give an approximate weight for these text books.

4. Jan 26, 2008

### bibliophile

about 1.5 pounds...we have to have at least three, but our main goal is to have over 27

5. Jan 26, 2008

### bibliophile

any suggestions

6. Jan 26, 2008

### _Mayday_

Are you allowed multiple folds?

7. Jan 26, 2008

### _Mayday_

Ok I've just worked it out. Cut each A4 sheet of paper into 4 pieces. Then turn them into cylinders keeping them together with the tape. Then simply space these 8 cyinders out with gaps in the middle, and the books should hold. If you dont understand that just say and ill try explain better.

8. Jan 26, 2008

### bibliophile

yes...just forgot something...they all have to be connected

9. Jan 26, 2008

### _Mayday_

Ok then connect them.

10. Jan 26, 2008

### lightarrow

Another possibility is to fold the cylinders at "zig-zag"; this make them more resistant to compression (but reduces their radius). I sometimes play with bank notes this way to sustain glassess.

11. Jan 26, 2008

### _Mayday_

Ok, so I would go for a cylinder shape, wether zig zagged or not, I think this is the way to go. Good luck.

12. Jan 27, 2008

### bibliophile

lightarrow, can you show me an example?

13. Jan 27, 2008

### lightarrow

With a bank note: fold the short side of it about 8 mm, then fold the successive 8 mm in the opposite way ecc. At the end you have a kind of "folding door". Then you connect the two short ends of the bank note and you have a kind of "toothed cylinder" one base of which is put horizontallly on a table; then you slowly put an object (a glass for example) trying to find its correct horizontal position on the folded bank note with slight corrections (or it will fall down). It requires some practice. I usually use a 10 € bank note.

Last edited: Jan 27, 2008
14. Jan 27, 2008

### plutoisacomet

What class is this for?

15. Jan 27, 2008

### plutoisacomet

I had a similar project in a class called "intro to engineering" It was team based and we had to build a load bearing structure out of balsa wood. However, we had to do our brainstorming and final concept design in class to prevent outside help.

16. Jan 28, 2008

### lightarrow

In addition to what I wrote, I think that "toothed cylinder" construction should be stabilized putting it between two normal cylinders of paper, so that it cannot "open" or "close" when you put the books on it.
>Good work.
Let me know if you succeeded and how.