I-beam
part · 1849 · Industrial Revolution
A rolled steel beam.
Principles and materials it uses
- Steel — is made of. Rolled steel.
- Rolling mill — uses. Rolling.
- Wrought iron — is made of. The first I-beams were made of wrought iron.
Where it is used
- Steel frame — is part of. I-beams.
What it is a kind of
- Beam — is a kind of. A beam.