Double Bitt Bollard for Marine Ports and Piers

The Double Bitt Bollard is a direct improvement over the single-column bollard. Its structure consists of two vertical columns connected to a base, enabling secure and reliable mooring by anchoring vessel lines.

Compared to single bitt structures, double bitt mooring bollards offer significant advantages in load distribution, rope stability, and operational convenience. Consequently, they are widely deployed at port terminals, container terminals, shipyards, industrial docks, and similar facilities. They securely anchor multiple mooring lines without interfering with adjacent vessels’ lines. Their angled design effectively assists in securing a vessel’s mooring lines.

OLIPORTS offers bollards with primer coating or galvanized finishes. While we maintain a comprehensive product line, we also provide custom manufacturing to meet specific specifications upon request. Our mooring bollards are compatible with both wire ropes and traditional ropes.

As a professional marine equipment supplier, OLIPORTS offers a comprehensive range of marine bollard products to fully meet diverse mooring requirements across various operating conditions. We support custom development and OEM production. Please feel free to contact us by phone or email for collaboration inquiries.

All OLIPORTS products are manufactured under a rigorous quality control system, meeting international offshore engineering standards and project specifications.

Technical Features of Double Bitt Bollards

pier double bitt bollard supplier

double bitt bollard

• Type: Smooth & Lugged
• Body Material: Ductile Iron / Cast Steel
• Capacity: up to 200T(customization)
• Line Loading Range: Horizontal ±180°; Vertical +60°/-15°
• Anchor bolt grades: Grade 4.8 to 8.8 Galvanized
• Forming process: Gravity casting
• Shape: Double-column, duckbill type
• Surface treatment: Sanded and painted
• Packaging: Stretch-wrapped, wooden pallet
• Appearance: Customizable
• Design Standards: ISO / EN / ASTM (project-specific requirements available)
• Tags: Double Bitt Bollards; Marine Bollards; Mooring Bollard; Bollards Types; Ship Bollard; Pier Double Bitt Bollard
• Class Approval: ABS, DNV-GL, CCS, Others

Types of Double Bitt Bollards

As a professional dual bitt bollards supplier, OLIPORTS offers both “whole double bitt” and “split-base” designs to meet diverse project requirements.

• Standard Pier Double Bitt Bollards: Suitable for general commercial docks where mooring lines are predominantly horizontal. Smooth surfaces minimize rope wear and simplify maintenance.
• Maine Boat Bollard with Lugs: Specifically engineered for ports with significant tidal fluctuations. Integrated ears prevent bollard disengagement when vessels are positioned higher above the dock.

Whether you need a whole double bitt bollard assembly or standalone ship mooring bollards, OLIPORTS engineer each marine boat bollard to match your double bitt bollard capacity requirements.

Core Features & Advantages

Eared Type – Maximized Safety: Integrated ears act as a mechanical barrier, effectively preventing mooring lines from slipping upward and jumping off the bollard, especially during extreme tidal or weather conditions. This enhances port safety and protects vessels.

Non-Ear Type – Speed of Operation: With no protrusions, lines can be quickly released with a single upward motion. This design minimizes rope abrasion, extending the lifespan of expensive polymer synthetic lines.

Suitable for mooring multiple lines (depending on bollard load capacity)

Optional concrete filling

Double Bitt Bollards Specification

Application range of Double Bitt Bollards

The smooth surface double bitt bollard features no lugs or reinforcing structures, presenting a clean overall design.

• Application Scenarios: Small to medium-sized ports; inland river terminals; passenger ferry terminals; general cargo terminals

Double bitt Mooring Bollards with Lugs feature ears or reinforcing ribs on the bollard body to increase friction between the mooring line and the bollard, preventing slippage under load. This design is typically used for high mooring forces or large port berths.

• Application Scenarios: Container terminals; Oil and energy terminals; Bulk cargo terminals; Large vessel berths

OLIPORTS mooring bollards are manufactured using proven casting and machining techniques, with stringent control over structural strength and dimensional accuracy at critical load-bearing points. They are equipped with an offshore-grade anti-corrosion coating system to ensure reliable load-bearing capacity and stable service life under long-term port operating conditions, meeting the quality and consistency requirements of project-based port engineering.

OLIPORTS provide customized bollard specifications tailored to project requirements such as vessel tonnage, berth structure, and mooring loads.

Frequently Asked Questions