Portal crane
device · 1900 · Electric age
A crane for loading ships.
What it is made of
- Wire rope — has part. The load hangs on steel cables.
- Electric motor — has part. Electric motors turn the winches.
- Gantry portal — has part. A U-shaped support over the tracks.
- Crane jib — has part. A slewing jib.
Principles and materials it uses
- Steel — is made of. A portal crane is a steel truss.
What it is a kind of
- Tower crane — is a kind of. A crane.