Mid-Deck Inboard Horizontal Roller Fairlead | CB/T 435 Type B for Ship Mooring

Product Specification

Mid-Deck Inboard Horizontal Roller Fairlead | CB/T 435 Type B for Ship Mooring Rope Support

Product Overview

The CB/T 435 Type B deck mounted inboard horizontal roller fairlead is installed in the middle deck area between the shipside roller fairlead and the middle mooring winch. Its main function is to act as an intermediate support point for a long mooring rope lead, especially when the winch is located far from the ship side and deck piping, fittings, or structural members are located between the winch and the shipside fairlead.

Unlike Type A, which is arranged at the ship side and used together with a shipside roller fairlead, Type B is an inboard deck-mounted support roller. It helps prevent the mooring rope from sagging onto the deck, assists the rope in crossing over deck obstacles, and can adjust the rope lead in the vertical direction. The roller bearing arrangement includes a lubricating oil groove for smooth rotation. When the fairlead height exceeds 700 mm, transverse bottom reinforcement and bracket reinforcement can be arranged to improve stability; final reinforcement details should be confirmed according to the vessel deck arrangement and project drawing.

Quick Specifications

• Product type: Mid-deck inboard horizontal roller fairlead → intermediate support point between shipside roller fairlead and middle mooring winch.
• Standard and type: CB/T 435-2005 Type B → inboard deck-mounted arrangement, different from Type A shipside arrangement.
• Nominal roller diameter: 200 mm and 250 mm → two standard roller sizes for different mooring load and rope lead arrangements.
• Supplied SWL table values: 100 kN and 210 kN → selection should be checked with the vessel mooring arrangement, rope lead angle, deck structure, and class requirement.
• Length options: 600 / 800 / 1000 / 1200 mm in the supplied table → useful for matching the deck distance between the middle mooring winch and shipside roller fairlead.
• Typical weight reference: 123.5 kg and 197.5 kg → calculated based on L = 800 mm and H = 1200 mm according to the supplied note.
• Roller rotation: bearing design with lubricating oil groove → helps maintain flexible rotation and reduce local rope friction during operation.
• Surface treatment: Sa 2.5 blasting + one layer epoxy shop primer as reference → galvanized, polished, or customized surface treatment can be discussed when specified.

Main Technical Parameters

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Selection & Inquiry Guide

Step 1: Confirm CB/T 435-2005 Type B deck mounted inboard horizontal roller fairlead and nominal roller diameter 200 mm or 250 mm.

Step 2: Confirm the middle mooring winch position, shipside roller fairlead position, rope path height, and whether the Type B fairlead is required as an intermediate rope support point.

Step 3: Confirm L option, required installation height H, available middle-deck space, nearby piping / fittings / deck structures, and whether height over 700 mm requires transverse bottom and bracket reinforcement.

Step 4: Confirm rope type, rope diameter, mooring load basis, required SWL verification, and classification society requirement before quotation.

Step 5: Confirm material requirement: C-Mn steel, mild steel, stainless steel, or other project-specified material.

Step 6: Confirm surface treatment, quantity, delivery destination, required delivery time, installation drawing, and reference photos if available.

Structure

Middle deck mounted base | Inboard horizontal roller | Roller shaft and bearing arrangement | Lubricating oil groove | Frame L bar | Transverse bottom reinforcement when required | Bracket reinforcement when height exceeds 700 mm | Shop primer or specified surface treatment

Mooring Rope Support, Installation & Engineering Advantages

• The Type B inboard deck-mounted position provides an intermediate rope support point between the middle mooring winch and the shipside roller fairlead.
• It helps prevent a long mooring rope span from sagging onto the deck and supports the rope when it needs to pass over deck piping, outfitting parts, or structural members.
• The horizontal roller can correct the rope path in the vertical direction before the rope reaches the shipside fairlead and overboard roller arrangement.
• The roller bearing design with lubricating oil groove supports flexible rotation and helps reduce sliding friction on PP ropes and other mooring ropes.
• For installation heights above 700 mm, transverse bottom reinforcement and bracket reinforcement can be arranged to improve stability; the final arrangement should match the vessel deck structure.
• Deck foundation, welding details, and local reinforcement should be checked by the shipyard or design office according to the mooring load path and project approval requirement.
• Type B should be distinguished from Type A: Type A is arranged at the ship side and used with the shipside roller fairlead, while Type B is arranged inboard as a deck support point.

Custom Attributes

• Standard: CB/T 435-2005 → reference for Type B mid-deck inboard horizontal roller fairlead dimensions and designation.
• Type: Type B inboard deck mounted → used as an intermediate support point between the middle mooring winch and shipside roller fairlead.
• Nominal Roller Diameter: 200 / 250 mm → select according to vessel drawing, rope arrangement, and required SWL basis.
• SWL: 100 / 210 kN from supplied table → do not replace project load verification or class approval requirement.
• Length: 600 / 800 / 1000 / 1200 mm options → select according to middle-deck layout and the rope lead distance between winch and shipside fairlead.
• Material: C-Mn steel, mild steel, or stainless steel → final grade and certificate scope to be confirmed by order requirement.
• Surface Treatment: Sa 2.5 blasting + one layer epoxy shop primer as reference → galvanized, polished, or customized finish available when specified.
• Reinforcement: transverse bottom and bracket reinforcement when height exceeds 700 mm → used to improve stability for taller installations.
• Certificate Requirement: available according to project requirement → maker certificate, material certificate, or class certificate scope should be confirmed before quotation.

How It Works

Mooring rope leaves the middle winch → Type B inboard horizontal roller fairlead supports the long rope span on the deck → Roller rotation guides the rope and reduces deck contact → Rope crosses over deck piping or structures when required → Rope continues toward the shipside roller fairlead and outboard lead path

Applications

Middle deck mooring stations | Rope lead between middle mooring winch and shipside roller fairlead | Long unsupported rope span arrangements | Decks with piping or outfitting obstacles | Vertical rope angle correction | PP rope mooring systems | Cargo ships | Tankers | Bulk carriers | Container vessels | Newbuilding and replacement projects

Certifications & Advantages

Certificates can be arranged according to project requirement, inspection scope, material traceability, and class society approval procedure.

Certification: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS, Makers Test Certificate.

Drawing & Photos

FAQ

Q1: What is the function of CB/T 435 Type B horizontal roller fairlead?

A1: Type B is installed inboard on the middle deck as an intermediate support point between the middle mooring winch and the shipside roller fairlead. It supports a long rope lead, helps keep the rope off the deck, and assists the rope in crossing over piping or deck structures.

Q2: Can the supplied SWL be used directly for every vessel?

A2: No. The supplied table provides SWL values for the standard sizes, but final selection should still be checked with the vessel mooring arrangement, rope lead angle, deck reinforcement, welding details, and class approval requirement.

Q3: What is the difference between Type A and Type B in this application?

A3: Type A is arranged at the ship side and used together with the shipside roller fairlead. Type B is installed inboard on the middle deck and works as a support roller between the shipside fairlead and the middle mooring winch.