Rib (noun)

Meaning A thin reinforcing wall added to increase stiffness without significantly increasing weight or material.

Think of… A human rib — a thin wall that adds strength without much weight.

Etymology Borrowed from the ribs of the human body, which provide strength with minimal weight.

DFM Meaning Used instead of making an entire wall thicker.

Singular - Add a rib below the large flat surface.

Plural - Add additional ribs to reduce bending.

Industry Example - Increase the number of ribs instead of increasing the wall thickness.

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Part of the Glossary reference.