the.com/corrugation
Cardboard's secret skeleton: ripples that turn floppy paper into something that can hold a fridge.
means A series of parallel ridges and grooves pressed into a material to make a thin, floppy thing stiff and strong.
from From Latin corrugare, 'to wrinkle up' — from com- (intensifying prefix) plus rugare, 'to wrinkle,' from ruga, 'a wrinkle or fold.' The same root that gives you the wrinkles on an old face gives cardboard its backbone: both are just 'rugae,' folds, pressed in or earned over time.
- arch physics
- each ripple is a tiny arch resisting bending
- same material
- more strength from shape, not more paper
- roof origins
- iron sheeting used it to shed rain and wind
- flute sizes
- named A B C E, each tuned for different crush resistance