Breakwater

device · 300 BC · Ancient world

A structure that protects a harbour.

What it is made of

• Rubble stone mound — has part. A stone ball.
• Concrete tetrapods — has part. Tetrapods dissipate the energy of the waves.

Principles and materials it uses

• Concrete — is made of. Concrete blocks.
• Stone — is made of. Breakwaters were built up of stone.

Where it is used

• Seaport — is part of. A breakwater.

Take Breakwater apart

Open Evothings