Material:

Durability: Made from materials like cast iron or steel and ductile Iiron to withstand the harsh marine environment and the forces exerted by large vessels.

Load Capacity:

High Load-Bearing: Designed to handle significant tension and shear forces, often rated in tons.

Usage:

Mooring and Towing: Used for securing vessels during loading, 

Multiple Lines: Often designed to accommodate multiple mooring lines to distribute the load.

Applications:

Commercial Ports: For securing cargo ships, tankers, and container vessels.

Fishing Docks: Used by fishing boats and trawlers.

Marinas: For securing pleasure boats, yachts, and smaller vessels.

Maintenance:

Regular Inspection: To check for corrosion, wear, and structural integrity.

Repainting and Coating: Often coated with protective paint to prevent rust and corrosion.

Replacement: Worn or damaged bollards should be replaced to ensure safety.