Term: corrugated
corrugated (adjective): shaped into a series of parallel ridges and grooves (waves) to provide added strength, rigidity, or to facilitate the drainage of liquid.
synonyms: fluted, grooved, ridged, furrowed, wavy. pronunciation: /ˈkɒr.ə.ɡeɪ.tɪd/ translation: gofrēts, viļņots example: The temporary shelter was constructed using sheets of corrugated iron for the roof. other words from this root: corrugation (noun), corrugate (verb).
Why Corrugate?
The primary reason for corrugating a material is to increase its strength-to-weight ratio. A thin, flat sheet of material is easy to bend; however, once it is folded into a “wave” pattern, it becomes much more resistant to bending along the direction of the ridges.
Common Applications
- Corrugated Fiberboard (Cardboard): This is the material used for most shipping boxes. It consists of a “fluted” (wavy) inner layer sandwiched between two flat “liner” layers.
- Corrugated Steel/Iron: Used extensively in roofing and siding, especially for industrial buildings and shipping containers. It is durable and allows rainwater to run off easily through the channels.
- Corrugated Plastic: Often used for temporary signs (like election posters) because it is lightweight and weather-resistant.
- Corrugated Hoses/Tubing: Used in medical equipment (like ventilators) or vacuum cleaners because the ridges allow the tube to bend without kinking or collapsing.
Comparison: Corrugated vs. Ribbed
While they look similar, they are used differently in engineering:
| Term | Structure | Purpose |
| Corrugated | The entire material is folded into a wave shape. | Structural rigidity and lightness. |
| Ribbed | A flat surface with raised lines added to it. | Grip, heat dissipation, or localized reinforcement. |
Technical Terms
- Pitch: The distance between two peaks of the waves.
- Depth: The height from the bottom of the groove to the top of the ridge.
- Fluting: The specific name for the wavy part inside a cardboard box.