ISO/DIS 23575

Ships and marine technology -- Marine securing devices for ro-ro cargoes

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DRAFT INTERNATIONAL STANDARD
ISO/DIS 23575
ISO/TC 8/SC 4 Secretariat: SAC
Voting begins on: Voting terminates on:
2020-11-27 2021-02-19
Ships and marine technology — Marine securing devices
for ro-ro cargoes
ICS: 47.020.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 23575:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
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PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
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ISO/DIS 23575:2020(E)
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© ISO 2020

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ii © ISO 2020 – All rights reserved
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ISO/DIS 23575:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Securing method of ro-ro cargoes ...................................................................................................................................................... 2

5 Fixed fittings ............................................................................................................................................................................................................. 2

6 Loose fittings ............................................................................................................................................................................................................ 3

7 Categorization of fixed fittings ............................................................................................................................................................... 3

8 Material .......................................................................................................................................................................................................................... 4

9 Dimension and strength requirements of fixed fittings .............................................................................................. 4

10 Test method of fixed fittings ..................................................................................................................................................................... 8

10.1 General requirement .......................................................................................................................................................................... 8

10.2 Test interval ............................................................................................................................................................................................... 8

10.3 Number of tests ...................................................................................................................................................................................... 8

10.4 Test profiles to be used (hook/elephant foot) ............................................................................................................. 8

10.5 Support of tested fitting .................................................................................................................................................................. 8

10.6 Test force ...................................................................................................................................................................................................... 8

10.7 Time that the test force shall be applied ........................................................................................................................... 9

10.8 Test angles ................................................................................................................................................................................................... 9

11 Appearance requirements.......................................................................................................................................................................... 9

12 Tightness requirement .................................................................................................................................................................................. 9

12.1 General requirement .......................................................................................................................................................................... 9

12.2 Test methods ............................................................................................................................................................................................. 9

12.2.1 Water tightness test ...................................................................................................................................................... 9

12.2.2 Air tightness test .............................................................................................................................................................. 9

12.2.3 Other methods ................................................................................................................................................................10

13 Marking .......................................................................................................................................................................................................................10

14 Test certificate of fixed fittings tested .........................................................................................................................................10

15 Test report of fixed fitting tested ......................................................................................................................................................11

16 Packaging, storage and transportation ......................................................................................................................................11

Annex A (informative) Securing methods of ro-ro cargoes ........................................................................................................12

Annex B (Informative) Installation and maintenance .....................................................................................................................16

Annex C (informative) Loose fittings .................................................................................................................................................................17

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ISO/DIS 23575:2020(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

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electrotechnical standardization.

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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).

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URL: 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.
iv © ISO 2020 – All rights reserved
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DRAFT INTERNATIONAL STANDARD ISO/DIS 23575:2020(E)
Ships and marine technology — Marine securing devices
for ro-ro cargoes
1 Scope

This document specifies examples of types, dimensions and strength of devices for securing of ro-ro

cargoes in sea transportation. It may also be used as a reference for road vehicles secured on inland

vessels.
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 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods

ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual

tolerance indications

ISO 5817, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding

excluded) — Quality levels for imperfections
ISO 7452, Hot-rolled steel plates — Tolerances on dimensions and shape
ISO 9001:2015, Quality management systems — Requirements

ISO 9013, Thermal cutting — Classification of thermal cuts — Geometrical product specification and

quality tolerances

ISO 9367-1, Lashing and securing arrangements on road vehicles for sea transportation on Ro/Ro ships —

General requirements — Part 1: Commercial vehicles and combinations of vehicles, semi-trailers excluded

IMO resolution A.581(14), Guidelines for securing arrangements for transport of road vehicles on ro-ro ships

MSC 1/Circ.1353, Revised guidelines for the preparation of the cargo securing manual

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IECElectropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.1
ro-ro cargoes

all types of cargoes carried on board ro-ro vessels as road vehicles, roll trailers, etc

3.2
fixed fittings
securing devices permanently installed in the vessel
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ISO/DIS 23575:2020(E)
3.3
loose fittings
securing devices not permanently installed in the vessel
3.4
MSL
Maximum Securing Load, in kN
the allowable load capacity for a device used to secure cargo to a ship
3.5
Proof Load, in kN
the test load during testing of securing devices.
3.6
MBL
Minimum Breaking Load, in kN
the tested minimum breaking strength of a securing device
3.7
α vertical lashing angle
angle between the lashing device and the horizontal plane, see Figure 1
3.8
β horizontal lashing angle

angle between the lashing device and the transverse direction on board the vessel, see Figure 1

Key
1 vertical lashing angle α
2 horizontal lashing angle β
Figure 1 — Lashing angles
4 Securing method of ro-ro cargoes

Rules and guidelines on the securing of cargoes are found in IMO instrument as well as in the vessels

Cargo Securing Manual. For information typical securing methods for ro-ro cargoes are found in the

informative Annex A to this standard.
5 Fixed fittings

5.1 The longitudinal distance of fixed fittings shall be not morethan 2,5 m, while the transverse

distance shall in general be between 2,8 m and 3 m.
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ISO/DIS 23575:2020(E)

5.2 The MSL of fixed fittings shall in general be not less than 100 kN. The MSL of fixed fittings for the

vehicle with gross weight of less than 15 tons may be less than 100 kN after calculation proves it can

meet the requirement of securing safety.

5.3 There shall be no sharp edge or sharp angle of the securing point within the area where road

vehicles run.

5.4 Fixed fittings shall be marked according to Chapter 13. For information typical installation and

maintenance of fixed fittings for ro-ro cargoes are found in the informative Annex B to this standard.

6 Loose fittings

For information typical loose fittings used for ro-ro cargoes are found in the informative Annex C to

this document.
7 Categorization of fixed fittings
Categorization of fixed fittings is as shown in Table 1.
Table 1 — Categorization of fixed fittings
Type Code Name Illustration Remarks
Securing area where the
D-ringand
I11 deck is not required to be
clamp
flat for vehicle running.
Securing area where the
Flush Lashing deck is required to be flat
C21
Pot and watertight for vehicle
running.
Fixed
fittings
Securing area where the
Flush Lashing deck is required to be flat
C22
Pot and watertight for vehicle
running.
Securing area where the
Flush Lashing deck is required to be flat
C23
Hole and watertight for vehicle
running.
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ISO/DIS 23575:2020(E)
Table 1 (continued)
Type Code Name Illustration Remarks
Suitable for securing of
C24 Crinkle Bar
small vehicles
Raised Lashing Securing area not required
C25
Pot to be flat
Fixed
fittings
Securing area where
securing loads are large
Raised Lashing and close to the main
C26
Pot supporting structuresuch
as bulkheads, girders and
transverses
8 Material

The strength grade of materials of fixing fittings shall not be lower than that of the plate to which they

are welded, the low-temperature impact performance shall not be lower than the grade of the plate to

which they are welded.
9 Dimension and strength requirements of fixed fittings

The dimension and strength requirements of fixed fittings are as shown in Figure 2~8 and Table 2~8.

Dimensions are in millimeters and strength in kN. The shown plate thickness t is the value, which

should meet the requirements of the classification society.

Steel plate thickness should comply with ISO 7452 requirements; Flame cutting unmarked dimensional

tolerances shall comply with ISO 9013 class 2 requirements; Tolerances for linear and angular

dimensions without individual tolerance indications shall comply with ISO 2768-v.

Figure 2 — I11 D-rings and clamps
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ISO/DIS 23575:2020(E)
Table 2 — Dimensions and strength of I11 D-rings and clamps
A B C D E T MSL Reference Mass
TYPE max max min min max min min max
(mm) (mm) (mm) (mm) (mm) (mm) (kN) (kg)
I11/40 15 16 40 50 25 6 40 0,5
I11/100 20 25 55 65 40 12 100 1,7
I11/180 25 30 60 75 45 14 180 2,7
Figure 3 — C21 flush lashing pot
Table 3 — Dimensions and strength of C21 flush lashing pot
A B C D E F G t MSL Reference Mass
TYPE abt max min min min abt min max
(mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (kN) (kg)
C21/100 240 16 27 186 35 65 115 12 100 8,2
C21/160 300 20 60 210 35 70 115 14 160 13,2
Figure 4 — C22 flush lashing pot
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ISO/DIS 23575:2020(E)
Table 4 — Dimensions and strength of C22 flush lashing pot
A B C D E F G H t MSL Reference Mass
TYPE abt max min min min abt abt min max
(mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (kN) (kg)
C22/100 240 16 27 186 35 65 57,5 78 12 100 7,3
C22/160 260 20 60 210 35 70 57,5 80 14 160 11,5
Key
1 deck.
Figure 5 — C23 flush lashing hole
Table 5 — Dimensions and strength of C23 flush lashing hole
A B C E t Dt MSL Reference Mass
TYPE abt min abt min min max
(mm) (mm) (mm) (mm) (mm) (mm) (kN) (kg)
C23/75 210 6 60 65 6~14 8 75 8,0
C23/100 210 6 60 65 6~14 13 100 8,0
key
1 deck.
Figure 6 — C24 crinkle bar
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ISO/DIS 23575:2020(E)
Table 6 — Dimensions and strength of C24 crinkle bar
L R H D MSL Reference Mass
TYPE abt min min max min max
(mm) (mm) (mm) (mm) (kN) (kg)
C24/20 290 23 30 13 20 0,4
C24/30 290 22 30 16 30 0,5
C24/100 400 25 40 25 100 1,7
Figure 7 — C25 raised lashing pot
Table 7 — Dimensions and strength of C25 raised lashing pot
A B D E G α MSL Reference Mass
TYPE abt max min min min max
min
(mm)
(mm) (mm) (mm) (mm) (mm) (mm) (kN) (kg)
C25/100 250 16 39 35 65 115 45° 100 5,1
C25/160 300 20 60 35 70 115 45° 160 11,4
Figure 8 — C26 raised lashing pot
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ISO/DIS 23575:2020(E)
Table 8 — Dimensions and strength of
...