JIS F 2005-1975 Deck Mounted Casting Steel Close Type Ship Mooring Chock Ship Mooring Equipment

Deck Mounted Closed Mooring Chock | Cast Steel Rope Guide for Ship Mooring (JIS F 2005)

Product Overview

The JIS F 2005 deck mounted closed mooring chock is a cast steel rope guide used on ship mooring decks. It is welded to the deck structure to guide wire rope, manila rope, or other specified mooring rope through a closed oval opening, helping to control the rope path and reduce sharp local contact during berthing, shifting, and harbor mooring operations.

This page covers the supplied JIS F 2005-1975 closed chock sizes from 100 to 500. The selection should be checked by nominal size, applicable rope diameter, overall deck arrangement, weld connection, deck reinforcement, surface treatment, and certificate requirement. It is a deck-mounted welded chock.

Quick Specifications

• Product type: Deck mounted closed mooring chock → closed rope passage for ship mooring deck arrangements.

• Standard: JIS F 2005-1975 → reference for drawing form, nominal size, main dimensions, and calculated mass.

• Nominal size range: 100 to 500 → covers small to larger deck mooring chock applications in the provided table.

• Material options: Cast C-Mn steel, cast stainless steel, or special steel for icebreaker projects → material selection should follow the vessel specification and approval scope.

• Calculated mass in supplied table: 8.7 to 232 kg → useful for handling, packing, freight estimate, and installation planning.

• Surface treatment: Sa 2.5 blasting + one layer epoxy shop primer as standard reference → polished stainless steel, black paint, or customized coating can be discussed when specified.

• Installation form: Deck welded structure → deck reinforcement, weld detail, rope lead angle, and shipyard installation condition should be confirmed before production.

• Manufacturing focus: casting soundness, wood pattern or lost foam process control, smooth rope-contact surface, 50 mm weld-adjacent quality control, and optional FEA review.

Main Technical Parameters

Main webpage selection data for JIS F 2005 deck mounted closed chock. Dimensions are in mm unless otherwise stated. Detailed standard dimensions are placed in the Backend Reference section.

Note: Reference rope diameter is for initial selection only. Final selection should be checked against the vessel mooring arrangement, rope lead angle, deck reinforcement, class requirement, and project drawing.

Selection & Inquiry Guide

Step 1: Confirm JIS F 2005-1975 closed chock and the required nominal size 100 / 150 / 200 / 250 / 300 / 350 / 400 / 450 / 500.

Step 2: Confirm rope type and diameter, such as wire rope construction, manila rope, or nylon rope if required by the vessel specification.

Step 3: Confirm deck installation position, available deck space, rope lead direction, weld connection, and deck reinforcement drawing.

Step 4: Confirm material requirement: cast C-Mn steel, cast stainless steel, or special steel for icebreaker service if applicable.

Step 5: Confirm surface treatment: Sa 2.5 blasting + epoxy shop primer, polished stainless steel, galvanizing, black paint, or project coating system.

Step 6: Confirm certificate scope before quotation: maker certificate, material certificate, class certificate, or witness inspection according to project requirement.

Step 7: Provide quantity, delivery destination, required delivery time, installation drawing, and reference photos if available.

Structure

Closed cast steel body | Oval rope opening | Smooth rope-contact radii | Deck welded base | Weld-adjacent casting control area | Drain hole arrangement | Shop primer or specified surface treatment

Casting, Welding & Engineering Advantages

• The closed opening helps keep the mooring rope within a defined rope path on the deck and reduces the risk of rope escape compared with open guide structures.

• Rope-contact areas are dressed, ground, and smoothed after casting to reduce sharp local contact and help protect wire rope, manila rope, or specified synthetic rope during mooring operation.

• Casting production can use wood pattern or lost foam process according to size, quantity, and dimensional requirement. Process selection should be confirmed before production when it affects surface quality or tolerance.

• The cast body area within 50 mm of the ship-structure welding zone is controlled to avoid casting indications that may affect shipyard welding quality.

• Deck welded installation requires confirmation of weld length, weld leg, surrounding deck reinforcement, and coating repair after installation. The chock body does not replace the deck structural calculation.

• FEA strength calculation and local structure review can be carried out when rope load basis, load direction, weld geometry, and deck reinforcement details are provided by the project.

• Visual inspection, dimensional checking, material traceability, NDT, or class witnessing can be arranged according to order requirement and approval procedure.

Custom Attributes

Standard: JIS F 2005-1975 → suitable when the vessel drawing specifies JIS closed chock dimensions.

Mounting Type: Deck mounted welded structure → selected for mooring deck rope guide positions rather than bulwark pipe openings.

Nominal Size: 100 to 500 → select by rope diameter, deck space, drawing group, and mooring arrangement.

Material: Cast C-Mn steel / cast stainless steel / special steel → final material should follow project specification and certificate requirement.

Casting Process: Wood pattern or lost foam → selected according to production quantity, dimensional requirement, and surface control requirement.

Rope-Contact Surface: Smooth ground radius → helps reduce sharp contact and supports rope service life.

Weld-Zone Control: 50 mm around ship-structure welding area → controlled to reduce harmful casting indications near the weld interface.

Engineering Review: FEA calculation available when required → based on confirmed load direction, rope data, weld geometry, and deck reinforcement.

Surface Treatment: Sa 2.5 blasting + epoxy shop primer as standard reference → final coating is normally completed according to the vessel painting specification.

Certificate Requirement: Available according to project requirement → class certificate or witness inspection should be confirmed before quotation.

How It Works

Mooring rope approaches the deck chock → Rope passes through the closed oval opening → Smooth cast steel contact radius guides the rope direction → Local contact force is transferred through the welded base to the deck structure → Weld inspection and coating repair are completed after installation

Applications

Cargo vessels | Tankers | Bulk carriers | Tugboats | Workboats | Barges | Ship mooring decks | Newbuilding projects | Replacement of existing JIS closed chocks

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: How should the correct JIS F 2005 closed chock size be selected?

A1: Select the nominal size according to the vessel drawing, rope type and diameter, available deck space, rope lead direction, and installation reinforcement. The reference rope table is for initial selection and should be checked against the actual mooring arrangement.

Q2: Is this product installed on the deck or on the bulwark?

A2: This page is for the deck-mounted welded JIS F 2005 closed chock. If the project needs a bulwark-mounted mooring pipe or bulwark chock, the standard, drawing, and installation structure should be confirmed separately.

Q3: What manufacturing details are important for cast steel closed chocks?

A3: Important points include casting soundness, smooth rope-contact finishing, drain hole cleaning, dimensional control, weld-adjacent quality control within 50 mm of the welding zone, and certificate or inspection scope required by the project.

Drawing of JIS F 2005-1975 Deck Mounted Casting Steel Close Type Ship Mooring Chock Ship Mooring Equipment