ISO 23575:2022

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 23575
ISO/TC 8/SC 4
Ships and marine technology —
Secretariat: SAC
Marine securing devices for ro-ro
Voting begins on:
2021-12-03 cargoes
Voting terminates on:
2022-01-28
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 23575:2021(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 2021

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ISO/FDIS 23575:2021(E)
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© ISO 2021
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ISO/FDIS 23575:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Securing method of ro-ro cargoes .3
5 Fixed fittings . 3
6 Loose fittings .3
7 Categorization of fixed fittings . 3
8 Material. 5
9 Dimension and strength requirements of fixed fittings . 5
10 Test method of fixed fittings .9
10.1 General requirement . 9
10.2 Type testing . 10
10.3 Production testing . 10
10.4 Test profiles to be used (hook/elephant foot) . 10
10.5 Support of tested fitting . 11
10.6 Test force . . 11
10.7 Test duration .12
10.8 Test angles .12
11 Appearance requirements .12
12 Tightness requirements .13
12.1 General requirement .13
12.2 Test methods . 13
12.2.1 Air tightness test .13
12.2.2 Other methods . 13
13 Marking . .13
14 Test report of fixed fitting .13
15 Manufacturers certificate to customer .14
16 Packaging, storage and transportation .14
Annex A (informative) Securing methods of ro-ro cargoes .16
Annex B (informative) Installation and maintenance .21
Annex C (informative) Loose fittings .22
Bibliography .27
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ISO/FDIS 23575:2021(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).
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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.
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 23575:2021(E)
Ships and marine technology — Marine securing devices
for ro-ro cargoes
1 Scope
This document specifies types, dimensions and strength characteristics of devices used for securing ro-
ro cargoes in sea transportation. It can 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 9013, Thermal cutting — Classification of thermal cuts — Geometrical product specification and
quality tolerances
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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/
3.1
ro-ro cargoes
all types of cargoes carried on board a ro-ro ship as road vehicles, roll trailers, etc.
3.2
fixed fitting
securing device permanently installed in the vessel
3.3
portable fitting
loose fitting
securing device not permanently installed in the vessel
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ISO/FDIS 23575:2021(E)
3.4
maximum securing load
MSL
allowable load capacity of a device used to secure cargo to a ship
Note 1 to entry: It is expressed in kN.
3.5
proof test load
test load during testing of securing devices
Note 1 to entry: It is expressed in kN.
3.6
minimum breaking load
MBL
tested minimum breaking strength of a securing device
Note 1 to entry: It is expressed in kN.
3.7
vertical lashing angle
α
angle between the lashing device and the horizontal plane
Note 1 to entry: See Figure 1.
3.8
horizontal lashing angle
β
angle between the lashing device and the transverse direction on board the vessel
Note 1 to entry: See Figure 1.
Key
1 vertical lashing angle, α
2 horizontal lashing angle, β
3 axis parallel to the transverse direction of the vessel
Figure 1 — Lashing angles
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ISO/FDIS 23575:2021(E)
3.9
road vehicle
commercial vehicle, semi-trailer, road train, articulated road train or a combination of vehicles
[2]
Note 1 to entry: The IMO Resolution MSC .479(102) defines road vehicle in 3.2.
4 Securing method of ro-ro cargoes
Rules and guidelines on the securing of cargoes are found in IMO instruments as well as in the vessels
cargo securing manual. For information, typical securing methods for ro-ro cargoes are given in
Annex A.
5 Fixed fittings
5.1 The arrangement of fixed fittings shall be left to the discretion of the shipowner provided that for
stowage of road vehicles in the ro-ro lanes, the longitudinal distance of fixed fittings shall be not more
than 2,5 m, while the transverse distance should be not more than 3,0 m. The MSL of these fittings shall
be not less than 100 kN.
5.2 There shall be no sharp edge or sharp angle of the securing point within the area where road
vehicles run.
5.3 Fixed fittings shall be marked according to Clause 13. For information purposes, procedures for
typical installation and maintenance of fixed fittings for ro-ro cargoes are given in Annex B.
6 Loose fittings
For information, typical loose fittings used for ro-ro cargoes are given in Annex C.
7 Categorization of fixed fittings
Categorization of fixed fittings is specified in Table 1.
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ISO/FDIS 23575:2021(E)
Table 1 — Categorization of fixed fittings
Type Code Name Illustration Remarks
Securing area on deck
D-ring and where no vehicles are
DR
clamp running or on bulkheads or
other strong structures.
Securing area where the
Flush clover deck is required to be flat
CL.F4
leaf socket and watertight for vehicle
running.
Fixed
fittings
Securing area where the
Flush half clo- deck is required to be flat
CL.F2
ver leaf socket and watertight for vehicle
running.
Securing area where the
Lashing cup for deck is required to be flat
LC
hole and watertight for vehicle
running.
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ISO/FDIS 23575:2021(E)
Table 1 (continued)
Type Code Name Illustration Remarks
Securing area on deck
where no vehicles are
CB Crinkle bar running close to the main
supporting structures such
as bulkheads.
Raised clover Securing area not required
CL.R4
leaf socket to be flat.
Fixed
fittings
Securing area where
securing loads are large
Raised half clo- and close to the main
CL.R2
ver leaf socket supporting structure, such
as bulkheads, girders and
transverses.
Raised lashing Securing area not required
LS.R3
socket be flat.
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 specified in Tables 2 to 9. Dimensions
are in millimetres and strengths in kN. The plate thickness, t, should meet the requirements of the
classification society.
The steel plate thickness shall meet the requirements of ISO 7452. Flame cutting unmarked dimensional
tolerances shall meet the requirements of ISO 9013, class 2. Tolerances for linear and angular
dimensions without individual tolerance indications shall comply with ISO 2768-1.
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ISO/FDIS 23575:2021(E)
Table 2 — Dimensions and strength of D-rings and clamps, DR
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
DR/40 15 16 40 50 25 6 40 0,5
DR/100 20 25 55 65 40 12 100 1,7
DR/180 25 30 60 75 45 14 180 2,7
Table 3 — Dimensions and strength of flush clover leaf socket, CL.F4
t
A B C D F MSL Reference mass
E G
ap-
TYPE approx max min min min min max
prox
mm mm
mm mm mm mm mm kN kg
mm
CL.F4/100 240 16 27 186 35 65 115 12 100 8,2
CL.F4/160 300 20 60 210 35 70 115 14 160 13,2
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ISO/FDIS 23575:2021(E)
Table 4 — Dimensions and strength of flush half clover leaf socket, CL.F2
A H t
B C D F MSL Reference mass
E G
ap- ap- ap-
TYPE max min min min min max
prox prox prox
mm mm
mm mm mm mm kN kg
mm mm mm
CL.F2/100 240 16 27 186 35 65 57,5 78 12 100 7,3
CL.F2/160 260 20 60 210 35 70 57,5 80 14 160 11,5
Table 5 — Dimensions and strength of lashing cup for hole, LC
Key
1 deck
A C t D MSL Reference mass
t
B E
TYPE approx min approx min min max
mm mm
mm mm mm mm kN kg
LC/75 210 6 60 65 6-14 8 75 8,0
LC/100 210 6 60 65 6-14 13 100 8,0
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ISO/FDIS 23575:2021(E)
Table 6 — Dimensions and strength of crinkle bars, CB
Key
1 deck
L R H D α MSL Reference mass
TYPE approx min min max max min max
mm mm mm mm ° kN kg
CB/20 290 23 30 13 40 20 0,4
CB/30 290 22 30 16 40 30 0,5
CB/100 400 25 40 25 40 100 1,7
Table 7 — Dimensions and strength of raised clover leaf socket, CL.R4
A
B E α MSL Reference mass
C
D G
ap-
TYPE max min min min max
min
prox
mm mm
mm
mm mm ° kN kg
mm
CL.R4/100 250 16 39 35 65 115 45 100 5,1
CL.R4/160 300 20 60 35 70 115 45 160 11,4
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ISO/FDIS 23575:2021(E)
Table 8 — Dimensions and strength of raised half clover leaf socket, CL.R2
A F
B C E α MSL Reference mass
D G
ap- ap-
TYPE max min min min min max
prox prox
mm mm
mm mm mm ° kN kg
mm mm
CL.R2/100 250 16 39 35 65 58 57,5 45 100 4,5
CL.R2/160 210 20 60 35 70 60 57,5 45 160 8,9
Table 9 — Dimensions and strength of raised lashing socket, LS.R3
Key
1 aft/fwd
A B C α MSL Reference mass
TYPE approx max min min min max
mm mm mm ° kN kg
LS.R3/30 127 6 22 45 30 0,8
LS.R3/50 140 8 22 45 50 1,1
LS.R3/100 140 13 27 45 100 3,1
10 Test method of fixed fittings
10.1 General requirement
Fixed fittings shall be tested according to this Clause at the manufacturing site. Type testing shall be
carried out to prove the capability of new designs and subsequent production testing shall be carried
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ISO/FDIS 23575:2021(E)
out to ensure the quality of the product. When mounted on board the vessel, tests shall be carried out
according to the class requirements, to verify proper installation.
Classification societies may require additional testing procedures.
10.2 Type testing
Test of compliance with strength requirements shall be carried out according to 10.4 to 10.8 with at
least three samples of each product in each direction. All samples must pass the requirements given in
10.6.
Test of compliance with tightness requirements shall be carried out according to Clause 12 with at least
three samples that have been subjected to a test load of at least 1,25 MSL in the direction that produces
the greatest deformation.
10.3 Production testing
For production testing, test of compliance with strength requirements shall be carried out according to
10.4 to 10.8 in the direction that produced the greatest deformation at a test force of at least 1,25 MSL
in the type test.
The minimum test frequency in the production of fixed fittings shall be as given in Table 10.
Table 10 — Sampling rate for fixed fittings
Maximum securing load (MSL)
One sample per lot
kN
Up to 30 Every 500 pieces
Over 30 to 100 Every 250 pieces
Over 100 Every 100 pieces
If the manufacturer operates a third party certified quality system according to ISO 9001, the lot sizes
in the table above may be tripled.
If, during production testing, the sample does not meet the requirements in 10.6, but sustains a load
of not less than 1,8 MSL without critical failure in the form of breakage or visible cracks, two further
...