ISO 13713 Mooring Chock

Type: ISO 13713 Mooring Chock Type A & Type B
Material: Cast steel (per ISO 13713), ductile iron optional.
Size Range: Available in multiple sizes from 150mm to 500mm (inside opening).
Weight: 48KG to 396KG
Surface Treatment: Primer coated, marine paint, or hot-dip galvanized.
Welding Type: Base or bulwark-mounted (as per design).
Certificate: CCS, DNV, ABS, BV, LR, etc.

Description

The ISO13713 Mooring Chock is a heavy-duty marine deck fitting, available in two types: Type A and Type B. It is designed in accordance with the International Standard ISO 13713, ensuring global compliance and performance. Typically welded to the deck or bulwark of ships, this closed chock provides a smooth, reinforced guide for mooring ropes, reducing abrasion and ensuring secure and safe berthing operations.

The ISO13713 Mooring Chocks are normally adopted for ships which use nylon or other synthetic ropes other than wire ropes considering the small bending ratio. Built to withstand the harsh marine environment, this chock is an essential component for any seagoing vessel. Its robust construction and streamlined interior design make it a critical component in ship mooring systems across commercial, industrial, and military marine vessels.

As a leading supplier of marine equipment, Boomarine offers a wide range of mooring chocks to suit your every need. Contact us today to learn more about our range of ISO 13713 compliant mooring chocks and find the perfect solution for your vessel’s needs.

ISO 13713 Mooring Chock Dimensions:

Dimensions of Type A – Deck-mounted mooring chocks

Nominal size L×H (mm)	l₁	l₂	l₃	B	H₁	H₂	R	R₁	R₂	R₃	R₄	R₅	T	T₁	Welding leg length^a Z₁	SWL^b		Calculated weight^c (kg)
Nominal size L×H (mm)	l₁	l₂	l₃	B	H₁	H₂	R	R₁	R₂	R₃	R₄	R₅	T	T₁	Welding leg length^a Z₁	kN	t	Calculated weight^c (kg)
250×200	100	250	444	160	377	80	100	197	80	46	20	15	34	18	85	353	36	73
300×250	110	300	536	200	468	100	125	243	100	64	25	20	36	20	9	491	50	121
350×250	125	350	608	220	489	110	125	254	110	72	30	20	38	20	95	589	60	151
400×250	135	400	682	240	511	120	125	266	120	78	30	20	42	23	105	736	75	200
450×250	150	450	760	260	535	130	125	280	130	80	30	20	50	28	125	981	100	280
500×250A	175	500	832	280	556	140	125	291	140	88	30	20	52	30	13	1128	115	338
500×250B	175	500	840	280	560	140	125	295	140	80	30	20	60	36	15	1373	140	396
a: The welding method may be changed based on the same welding volume/strength. b: The SWLs shown are for reference only. These are based on the loadings as mentioned in Annex A. The “SWL” which is marked on the fitting may be adjusted depending on the actual loading conditions of the mooring rope under the agreement between the user and the manufacturer. c: The calculated weight (mass)is for reference only.

Dimensions of Type B – Bulwark-mounted mooring chocks

Nominal size L×H (mm)	l₁	l₂	B	H₁	H₂	C	R	R₁	R₂	R₃	T	T₁	Welding leg length^a		SWL^b		Calculated weight^c (kg)
Nominal size L×H (mm)	l₁	l₂	B	H₁	H₂	C	R	R₁	R₂	R₃	T	T₁	Z₁	Z₂	kN	t	Calculated weight^c (kg)
250×200	450	398	154	408	327	57	100	200	174	78	26	20	8	8	353	36	48
300×250	516	460	168	466	387	60	125	233	205	85	27	24	8	95	491	50	83
350×250	582	520	177	482	395	65	125	241	210	90	29	25	9	10	589	60	100
400×250	652	588	193	502	412	70	125	251	219	98	34	32	95	13	736	75	145
450×250	734	662	213	534	433	77	125	267	231	108	41	36	125	145	981	100	215
500×250A	812	730	237	562	447	82	125	281	240	120	41	36	125	145	1128	115	235
500×250B	828	750	253	578	466	82	125	289	250	128	48	41	145	165	1373	140	266
a: The welding method may be changed based on the same welding volume/strength. b: The SWLs shown are for reference only. These are based on the loadings as mentioned in Annex A. The “SWL” which is marked on the fitting may be adjusted depending on the actual loading conditions of the mooring rope under the agreement between the user and the manufacturer. c: The calculated weight (mass)is for reference only.

Key Features of ISO13713 Mooring Chock:

High-Strength Construction: Made from marine-grade cast steel or ductile iron, ensuring durability under extreme marine environments.
Corrosion Resistance: Optional hot-dip galvanizing or marine coating available for enhanced resistance to saltwater corrosion.
Smooth and Fair Lead: The carefully designed profile minimizes wear and tear on mooring lines, extending their lifespan and ensuring smooth passage during mooring maneuvers.
Fully Enclosed Design: Prevents rope escape and enhances line control, even under high tension.
Various Mounting Options: Available in different mounting configurations (e.g., welded, bolted) to suit diverse deck arrangements and installation requirements.
Easy Installation: Designed for welding directly to the ship’s hull or deck with clear mounting surfaces.

Optional Features: Depending on the manufacturer, may offer features like wear pads or specialized coatings for enhanced durability.

Applications of ISO13713 Mooring Chock:

Cargo Vessels: Ensures safe mooring in commercial shipping operations.
Tugboats and Workboats: Provides secure line handling for high-tension marine tasks.
Naval Ships: Trusted for durability and reliability in defense marine fleets.
Offshore Platforms: Used in fixed or floating offshore structures for anchor line routing.
Fishing and Passenger Vessels: Adds safety and line integrity in vessels requiring frequent docking.

Why Choose Our ISO 13713 Mooring Chocks?

Our mooring chocks are engineered for performance, safety, and longevity. Whether you operate large cargo ships or small working vessels, the ISO 13713 chock is your trusted partner for secure mooring in all marine conditions.