Laminated panels

[William R. Monroe]

Alan,

I think this speaks to the cardboards ability to absorb energy, rather than 
it's strength.  Much like the race car that crushes and comes flying apart 
in the event of a crash.  Design is not for strength there, but to absorb as 
much energy as possible before the driver experiences whatever energy is 
left.

William R. Monroe

> Corrugated cardboard is actually incredibly strong for what it is. The 
> army here tested various methods of throwing parcels out of planes to see 
> which method would result in the least damage . The test was to throw out 
> a piano wrapped in various materials from the plane, attached to a 
> parachute of course, and found that cardboard was the winner. No damage to 
> Olde Birdcage!

SNIP

> AF