ISO 4845:2023

Ships and marine technology — Combined rigging for deep-sea mooring

This document specifies types, dimensions, tests and other technical requirements for combined rigging used for deep-sea mooring (hereinafter referred to as “combined rigging”). This document is applicable to the combined rigging consisting of high modulus polyethylene (HMPE) fibre ropes, mooring chains, and shackles used for mooring and positioning offshore structures with depths of 1 000 m to 5 000 m.

Navires et technologie maritime — Gréement combiné pour l'amarrage en haute mer

General Information

• Status: Published
• Publication Date: 09-Mar-2023
• ICS: 47.020.50 - Deck equipment and installations
• Technical Committee: ISO/TC 8/SC 4 - Outfitting and deck machinery
• Drafting Committee: ISO/TC 8/SC 4/WG 3 - Outfitting
• Current Stage: 6060 - International Standard published
• Start Date: 10-Mar-2023
• Due Date: 09-Apr-2023
• Completion Date: 10-Mar-2023

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 4845
First edition
2023-03
Ships and marine technology —
Combined rigging for deep-sea
mooring
Navires et technologie maritime — Gréement combiné pour
l'amarrage en haute mer
Reference number
ISO 4845:2023(E)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO 4845:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 4845:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design . 1
4.1 Structural types of combined rigging . 1
4.2 Combination design. 2
5 Performance . 2
5.1 Overall performance . 2
5.2 Fibre ropes . 3
5.2.1 Composition . 3
5.2.2 Fibre rope performances . 3
5.2.3 Typical types . 3
5.3 Mooring chains . 4
5.3.1 Mooring chains performances . 4
5.3.2 Typical types . 4
5.4 Shackles . 5
5.4.1 Shackles performances . 5
5.4.2 Typical types . 5
6 Test . 6
7 Marking and documents delivered .7
7.1 Marking . 7
7.2 Technical documents . 7
Annex A (normative) Ratio of fibre rope and mooring chain . 8
Annex B (informative) Corrosion and wear allowances of mooring chain and connecting
parts . 9
Annex C (informative) Types of thimbles .10
Bibliography .11
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO 4845:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 4, Outfitting and deck machinery.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 4845:2023(E)
Ships and marine technology — Combined rigging for
deep-sea mooring
1 Scope
This document specifies types, dimensions, tests and other technical requirements for combined
rigging used for deep-sea mooring (hereinafter referred to as “combined rigging”).
This document is applicable to the combined rigging consisting of high modulus polyethylene (HMPE)
fibre ropes, mooring chains, and shackles used for mooring and positioning offshore structures with
depths of 1 000 m to 5 000 m.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 18692-3, Fibre ropes for offshore stationkeeping — Part 3: High modulus polyethylene (HMPE)
ISO 20438:2017, Ships and marine technology — Offshore mooring chains
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Design
4.1 Structural types of combined rigging
The combined rigging consists of fibre ropes, mooring chains and shackles, as shown in Figure 1.
1
© ISO 2023 – All rights reserved

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ISO 4845:2023(E)
Key
L length of the outlet end of mooring chains which connects with windlasses
1
L length of the middle part of combine rigging which is fibre rope
2
L length of the end of mooring chains which connects with anchors
3
1 shackle
2 mooring chain
3 fibre rope
4 thimble
Figure 1 — Combined rigging diagram
4.2 Combination design
4.2.1 The strength design of the combined rigging shall meet the following requirements:
a) The strength of the fibre rope shall meet the minimum breaking strength at the end of service time.
b) The ratio of the fibre rope and mooring chain shal
...

2022-10-2511-21 Style Definition: Heading 1: Indent: Left: 0 pt, First line:
0 pt, Tab stops: Not at 21.6 pt
ISO/FDIS 4845:2022(E) Style Definition: Heading 2: Font: Bold, Tab stops: Not at
18 pt
ISO TC 8/SC 4/WG 3 Style Definition: Heading 3: Font: Bold
Style Definition: Heading 4: Font: Bold
Secretariat: SAC
Style Definition: Heading 5: Font: Bold
Style Definition: Heading 6: Font: Bold
Ships and marine technology — Combined rigging for deep-sea mooring
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Bold
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Formatted: English (United Kingdom)
Formatted: English (United Kingdom)
Formatted: Font: Bold, English (United Kingdom)
Formatted: English (United Kingdom)
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Latin and Asian text, Adjust space between Asian text and
numbers
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---------------------- Page: 1 ----------------------
ISO/FDIS 4845:2022(E)
Formatted
Contents
Foreword . iii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design . 1
4.1 Structural types of combined rigging . 1
4.2 Combination Design . 2
5 Performance . 2
5.1 Overall Performance . 2
5.2 Fibre ropes . 3
5.3 Mooring chains . 4
5.4 Shackles . 5
6 Test . 6
7 Marking and documents delivered . 6
7.1 Marking . 6
7.2 Technical documents . 6
Annex A(informative) . 7
Annex B(normative) . 8
Annex C(informative) . 9

© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no
part of this publication may be reproduced or utilized otherwise in any form or by any means,
electronic or mechanical, including photocopying, or posting on the internet or an intranet, without
prior written permission. Permission can be requested from either ISO at the address below or
ISO's member body in the country of the requester.
ISO Copyright Office
CP 401 • CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Formatted: Font: 11 pt
Email: [e-mail]
Formatted: Line spacing: Exactly 11 pt
2 © ISO 2022 – All rights reserved
ii © ISO 2022 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 4845:2022(E)
Website: www.iso.org
Published in Switzerland.
Formatted: Font: 11 pt
Formatted: Line spacing: Exactly 11 pt
© ISO 2022 – All rights reserved 3
© ISO 2022 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/FDIS 4845:2022(E)
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design . 1
4.1 Structural types of combined rigging . 1
4.2 Combination design . 2
5 Performance . 2
5.1 Overall performance . 2
5.2 Fibre ropes . 3
5.2.1 Composition . 3
5.2.2 Fibre rope performances . 3
5.2.3 Typical types . 3
5.3 Mooring chains . 5
5.3.1 Mooring chains performances . 5
5.3.2 Typical types . 5
5.4 Shackles . 6
5.4.1 Shackles performances . 6
5.4.2 Typical types . 6
6 Test . 7
7 Marking and documents delivered . 8
7.1 Marking . 8
7.2 Technical documents . 8
Annex A (normative) The ratio of fibre rope and mooring chain . 9
Annex B (informative) Corrosion and wear allowances of mooring chain and connecting
parts . 10
Annex C (informative) Types of thimbles . 11
Bibliography . 1
Formatted: Font: 11 pt
Formatted: Line spacing: Exactly 11 pt
4 © ISO 2022 – All rights reserved
iv © ISO 2022 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 4845:2022(E)
Formatted: Adjust space between Latin and Asian text,
Foreword
Adjust space between Asian text and numbers
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directiveswww.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patentswww.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.htmlwww.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 4, Outfitting and deck machinery.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at
www.iso.org/members.htmlwww.iso.org/members.html.
Formatted: Font: 11 pt
Formatted: Line spacing: Exactly 11 pt
© ISO 2022 – All rights reserved 5
© ISO 2022 – All rights reserved v

---------------------- Page: 5 ----------------------
ISO/FDIS 4845:2022(E)
Ships and marine technology — Combined rigging for deep-sea
mooring
1 Scope
This document specifies types, dimensions, tests and other technical requirements for combined rigging
used for deep-sea mooring (hereinafter referred to as “combined rigging”).
This document is applicable to the combined rigging consisting of Highhigh modulus polyethylene
(HMPE) fibre ropes, mooring chains, and shackles used for mooring and positioning offshore structures
with depths of 1 000 m to 5 000 m.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 18692-3:2020, Fibre ropes for offshore station-keepingstationkeeping — Part 3: High modulus Formatted: std_docNumber
polyethylene (HMPE)
Formatted: std_docPartNumber
ISO 20438:2017, Ships and marine technology — Offshore mooring chains
3 Terms and definitions Formatted: Tab stops: Not at 21.6 pt
For the purposes of this document, the followingNo terms and definitions applyare listed in this
document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/https://www.electropedia.org/
4 Design
4.1 Structural types of combined rigging
The combined rigging consists of fibre ropes, mooring chains and shackles, as shown in Figure 1.
L1 L2 L3
b
a a d c

© ISO 2022 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO/FDIS 4845:2022(E)

Key
Formatted: Don't keep with next
L length of the outlet end of mooring chains which connects with windlasses
1
Formatted: Justified
L2 length of the middle part of combine rigging which is fibre rope
Formatted: Justified
L3 length of the end of mooring chains which connects with anchors
Formatted: Justified
a
1 shackle
Formatted: Justified
b
2 mooring chain
c Formatted: Not Superscript/ Subscript
3 fibre rope
d
4 thimble Formatted: Not Superscript/ Subscript
Formatted: Justified
Figure 1 — Combined rigging diagram
Formatted: Justified
Formatted: Not Superscript/ Subscript
4.2 Combination design
Formatted: Justified
Formatted: Not Superscript/ Subscript
4.2.1 The strength design of the combined rigging shall meet the following requirements:
a) The strength of the fibre rope shall meet the minimum breaking strength at the end of service time.
b) The ratio of the fibre rope and mooring chain is shownshall be in accordance with Annex A. Formatted: cite_app
Formatted: cite_app
c) The strength of the mooring chain shall meet the minimum breaking strength at the end of service
time, and the corrosion allowance of the mooring chain shall refer toshould be as specified in
Annex B.
d) The strength ratio of the mooring chain and fibre rope shall be 1,05 ~ 1,1. The size of the end link
shall be 1,2 times that of the common link. Formatted: Font color: Auto
e) The size of the shackle shall be identical to the size of the end link.
4.2.2 The length design of combined rigging shall meet the following requirements:
a) The creep of the fibre rope shall be considered in the length design of L and L of mooring chain.
1 3
b) The length of L of mooring chain shall keep the fibre rope below the water surface from the period
1 Formatted: Font color: Auto
of structure installation finished until it'sit is retired.
Formatted: Font color: Auto, English (United Kingdom)
Formatted: Font color: Auto
c) The length of L mooring chain shall keep the fibre rope from any friction with the seabed from the
3
Formatted: Font color: Auto
period of structure installation finished until it'sit is retired.
Formatted: Font color: Auto
5 Performance
Formatted: Font color: Auto, English (United Kingdom)
Formatted: Font color: Auto
5.1 Overall performance
Formatted: Font color: Auto
5.1.1 The components of each combined rigging shall be firmly and reliably connected. The
components of different combined rigging of the same specification shall be interchanged.
5.1.2 The overall performance of the combined rigging specified in this document shall meet the design
service time of not less than 10 years.
2 © ISO 2022 – All rights reserved

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ISO/FDIS 4845:2022(E)
5.2 Fibre ropes
5.2.1 Composition
The fibre rope consists of a core rope, a particle-resistant isolating layer, a protective layer and thimbles
at two ends.
5.2.2 Fibre rope performances
5.2.2.1 The raw material of fibre rope
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 4845
ISO/TC 8/SC 4
Ships and marine technology —
Secretariat: SAC
Combined rigging for deep-sea
Voting begins on:
2022-12-05 mooring
Voting terminates on:
2023-01-30
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 4845:2022(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2022

---------------------- Page: 1 ----------------------
ISO/FDIS 4845:2022(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 4845
ISO/TC 8/SC 4
Ships and marine technology —
Secretariat: SAC
Combined rigging for deep-sea
Voting begins on:
mooring
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 4845:2022(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2022 – All rights reserved
NATIONAL REGULATIONS. © ISO 2022

---------------------- Page: 2 ----------------------
ISO/FDIS 4845:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design . 1
4.1 Structural types of combined rigging . 1
4.2 Combination design. 2
5 Performance . 2
5.1 Overall performance . 2
5.2 Fibre ropes . 3
5.2.1 Composition . 3
5.2.2 Fibre rope performances . 3
5.2.3 Typical types . 3
5.3 Mooring chains . 4
5.3.1 Mooring chains performances . 4
5.3.2 Typical types . 4
5.4 Shackles . 5
5.4.1 Shackles performances . 5
5.4.2 Typical types . 5
6 Test . 6
7 Marking and documents delivered .7
7.1 Marking . 7
7.2 Technical documents . 7
Annex A (normative) The ratio of fibre rope and mooring chain . 8
Annex B (informative) Corrosion and wear allowances of mooring chain and connecting
parts . 9
Annex C (informative) Types of thimbles .10
Bibliography .11
iii
© ISO 2022 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 4845:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non­governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 4, Outfitting and deck machinery.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2022 – All rights reserved

---------------------- Page: 4 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 4845:2022(E)
Ships and marine technology — Combined rigging for
deep-sea mooring
1 Scope
This document specifies types, dimensions, tests and other technical requirements for combined
rigging used for deep­sea mooring (hereinafter referred to as “combined rigging”).
This document is applicable to the combined rigging consisting of high modulus polyethylene (HMPE)
fibre ropes, mooring chains, and shackles used for mooring and positioning offshore structures with
depths of 1 000 m to 5 000 m.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 18692­3, Fibre ropes for offshore stationkeeping — Part 3: High modulus polyethylene (HMPE)
ISO 20438:2017, Ships and marine technology — Offshore mooring chains
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Design
4.1 Structural types of combined rigging
The combined rigging consists of fibre ropes, mooring chains and shackles, as shown in Figure 1.
1
© ISO 2022 – All rights reserved

---------------------- Page: 5 ------------------
...