Why Does Corrugation Increase Strength?

The corrugations increase the bending strength of the sheet in the direction perpendicular to the corrugations, but not parallel to them, because the steel must be stretched to bend perpendicular to the corrugations. Normally each sheet is manufactured longer in its strong direction.

How does corrugation add strength?

Well, actually the term ‘corrugated’ means to bend into folds or alterative ridges. If you look closely at a piece of corrugated cardboard you’ll see a wavy texture in between. This creates the strength and rigidness that prevents the cardboard from folding on itself like paper would.

Why is corrugated metal stronger?

When the corrugated metal is made it is cold-worked which takes that portion of the metal beyond its yield point. This makes the bent portion of the metal stronger and more force is required to reach its new yield point.