Small craft — Hull construction and scantlings — Part 10: Rig loads and rig attachment in sailing craft

This document specifies methods for the determination of: — the design loads and design stresses on rig elements; and — the loads and scantlings of rig attachments and mast steps/pillars; on monohull and multihulls sailing craft. It also gives, in Annexes, "established practices" for the assessment of mast steps/pillars or chainplates NOTE 1 Other engineering methods can be used provided the design loads and design stresses are used. This document is applicable to craft with a hull length LH up to 24 m but it can also be applied to craft up to 24 m load line length. NOTE 2 The load line length is defined in the OMI "International Load Lines Convention 1966/2005", it is smaller than LH. This length also sets up, at 24 m, the lower limit of several IMO conventions. Scantlings derived from this document are primarily intended to apply to recreational craft, including charter vessels. This document is not applicable to racing craft designed only for professional racing. This document only considers the loads exerted when sailing. Any loads that may result from other situations are not considered in this document. Throughout this document, and unless otherwise specified, dimensions are in (m), areas in (m2), masses in (kg), forces in (N), moments in (N m), stresses and elastic modulus in N/mm2 (1 N / mm2 = 1 Mpa). Unless otherwise stated, the craft is assessed in fully loaded ready for use condition.

Petit navires — Construction de la coque et échantillonnage — Partie 10: Charges dans le gréement et points d'attache du gréement dans les bateaux à voiles

Le présent document spécifie des méthodes pour la détermination: — des charges de conception et des contraintes de conception dans les éléments du gréement; et — des charges et des échantillonnages des points d'attache du gréement et du pied de mât/épontille; sur les voiliers monocoques et multicoques. Il donne également, dans des Annexes, des «pratiques établies» pour l'évaluation des pieds de mât/épontilles ou des cadènes. NOTE 1 D'autres méthodes d'ingénierie peuvent être utilisées à condition que les charges et les contraintes de conception soient utilisées. Ce document est applicable aux bateaux d'une longueur de coque LH inférieure ou égale à 24 m mais il peut également s'appliquer aux bateaux d'une longueur de ligne de charge inférieure ou égale 24 m. NOTE 2 La longueur de la ligne de charge (longueur de référence) est définie dans la «Convention internationale sur les lignes de charge 1966/2005» de l'OMI, elle est inférieure à LH. Cette longueur établit également, à 24 m, la limite inférieure de plusieurs conventions de l'OMI. Les échantillonnages provenant du présent document sont principalement destinés à s'appliquer sur les bateaux de plaisance, y compris les bateaux de location avec équipage (charter). Ce document n'est pas applicable aux bateaux de course conçus uniquement pour des courses professionnelles. Ce document ne considère que les charges exercées lors de la navigation. Les charges pouvant résulter d'autres situations ne sont pas prises en compte dans ce document. Dans tout ce document, sauf indication contraire, les dimensions sont en (m), les surfaces en (m2), les masses en (kg), les forces en (N), les moments en (Nm), les contraintes et modules d'élasticité en N/mm2 (1 N / mm2 = 1 Mpa) Sauf indication contraire, le bateau doit être évalué en condition de pleine charge prête à l'emploi.

General Information

Status
Published
Publication Date
08-Nov-2020
Technical Committee
Drafting Committee
Current Stage
6060 - International Standard published
Start Date
09-Nov-2020
Completion Date
09-Nov-2020
Ref Project

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INTERNATIONAL ISO
STANDARD 12215-10
First edition
2020-11
Small craft — Hull construction and
scantlings —
Part 10:
Rig loads and rig attachment in
sailing craft
Petit navires — Construction de la coque et échantillonnage —
Partie 10: Charges dans le gréement et points d'attache du gréement
dans les bateaux à voiles
Reference number
ISO 12215-10:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 12215-10:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 12215-10:2020(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

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

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

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

4 Symbols .......................................................................................................................................................................................................................... 3

5 Application of the document .................................................................................................................................................................... 4

5.1 General ........................................................................................................................................................................................................... 4

5.2 The simplified method ..................................................................................................................................................................... 4

5.3 The developed method .................................................................................................................................................................... 4

5.4 Steps of the methods and corresponding clauses of this document ......... ................................................ 5

6 Simplified and developed methods — Design stresses ................................................................................................ 6

6.1 General ........................................................................................................................................................................................................... 6

6.2 Design load vs safety factor .......................................................................................................................................................... 7

7 Developed method — General assessments, design moment ............................................................................... 8

7.1 General ........................................................................................................................................................................................................... 8

7.1.1 General topics on rigging design ........................................................................................................................ 8

7.1.2 Sail configurations: ........................................................................................................................................................ 9

7.1.3 Rigging loads and adjustment information to be provided ........................................................ 9

7.2 Design moment M : righting or heeling moment ..................................................................................................10

7.2.1 General...................................................................................................................................................................................10

7.2.2 Principle of design .......................................................................................................................................................10

7.2.3 Topics on multihulls/form stable sailing craft corresponding to case b) i.e.

with M < M .......................................................................................................................................................13

H1 R UP1
7.2.4 Downwind longitudinal force F and nose trimming moment
ADOWN
M , running under spinnaker alone — "Normal" (S ) or
HDOWN c6

"exceptional" (S ) .......................................................................................................................................................14

7.2.5 Maximum righting moment M , exceptional case, reaching under
RMAX

spinnaker .............................................................................................................................................................................14

7.2.6 Heeling force F and heeling moment M while broaching
ABROACH HBROACH

under spinnaker, exceptional case .................................................................................................................14

7.2.7 Minimum sail configuration and righting/heeling moment to be analyzed .............14

7.3 Rig dimensions, and default values for areas, forces and points of application ..........................15

7.4 Wing masts ..............................................................................................................................................................................................21

7.5 Resultant forces in sails ................................................................................................................................................................22

8 Loads in rigging elements — Developed method ............................................................................................................23

8.1 General ........................................................................................................................................................................................................23

8.2 Force in forestay, inner forestay, mainsail leech and on halyards ............................................................23

8.2.1 General...................................................................................................................................................................................23

8.2.2 Force in forestay, inner forestay, mainsail leech and on halyards connected

with sag .................................................................................................................................................................................24

8.2.3 Force in forestay to balance the longitudinal component of forces from aft

set shrouds, fixed/running backstays, mainsail leech ..................................................................24

8.3 Force in backstay, running backstays, or equivalent ...........................................................................................24

8.3.1 General...................................................................................................................................................................................24

8.3.2 Fractional rig with fixed backstay, no running backstay and aft angled

spreaders .............................................................................................................................................................................25

8.3.3 Case of rigs without fixed nor running backstay ...............................................................................25

8.4 Compression in the mast step/pillar ................................................................................................................................27

8.4.1 General...................................................................................................................................................................................27

8.4.2 Initial mast compression due to pre-stressing ...................................................................................27

© ISO 2020 – All rights reserved iii
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ISO 12215-10:2020(E)

8.4.3 Mast compression due to heeling or broaching .................................................................................28

8.4.4 Design compression in the mast step/pillar .........................................................................................28

8.4.5 Detail topics on mast step/pillar ....................................................................................................................28

8.5 Final design load on rig elements ........................................................................................................................................28

9 Structural components to be assessed — Simplified or developed method .......................................29

9.1 General ........................................................................................................................................................................................................29

9.2 Mast steps and mast pillars and their connection to the craft's structure .......................................29

9.3 Chainplates and their connections to the craft's structure............................................................................29

9.4 Design details of chainplates and their connection to the structure .....................................................30

9.4.1 General...................................................................................................................................................................................30

9.4.2 Strapped FRP chainplates .....................................................................................................................................30

10 Application of the simplified method ..........................................................................................................................................31

11 Application of the developed method .........................................................................................................................................31

11.1 General ........................................................................................................................................................................................................31

11.2 General guidance for assessment by 3-D numerical procedures .............................................................31

11.2.1 General...................................................................................................................................................................................31

11.2.2 Material properties .....................................................................................................................................................32

11.2.3 Boundary assumptions ...........................................................................................................................................32

11.2.4 Load application ............................................................................................................................................................32

11.2.5 Model idealization .......................................................................................................................................................32

11.3 Assessment by ‘strength of materials’ based methods .....................................................................................32

12 Application of this document ...............................................................................................................................................................32

13 Information in the owner's manual ...............................................................................................................................................32

14 Information to the boat builder .........................................................................................................................................................33

Annex A (informative) Application sheet of ISO 12215-10 ........................................................................................................34

Annex B (informative) Information on metals and bolts .............................................................................................................36

Annex C (normative) Simplified "established practice" for mast step/pillar assessment ........................40

Annex D (normative) Simplified "established practice" for the assessment of

chainplatesand their connection ......................................................................................................................................................47

Annex E (informative) Simplified "established practice" calculation oftransverse rig

elements — Examples ..................................................................................................................................................................................69

Bibliography .............................................................................................................................................................................................................................77

iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 12215-10:2020(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

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 ISO/TC 188, Small craft.
A list of all parts in the ISO 12215 series can be found on the ISO website.

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.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO 12215-10:2020(E)
Introduction

The reason underlying the preparation of the ISO 12215 series is that scantlings rules and recommended

practices for small craft differ considerably, thus limiting the general worldwide acceptability of craft.

This document has been set towards the minimal requirements of the current practice.

The dimensioning according to this document is regarded as reflecting current practice, provided

the craft is correctly handled in the sense of good seamanship and equipped and operated at a speed

appropriate to the prevailing sea state.

This document is not a design standard and designers/builders are strongly cautioned from attempting

to design craft such that nearly all structural components only just comply.

The connection between the rig attachment and the structure is required to be stronger than the rig

attachment itself. It is therefore considered that unforeseen overload will not entail its detachment

from the structure, and that the watertight integrity will be maintained.
vi © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
INTERNATIONAL STANDARD ISO 12215-10:2020(E)
Small craft — Hull construction and scantlings —
Part 10:
Rig loads and rig attachment in sailing craft
1 Scope
This document specifies methods for the determination of:
— the design loads and design stresses on rig elements; and
— the loads and scantlings of rig attachments and mast steps/pillars;
on monohull and multihulls sailing craft.

It also gives, in Annexes, "established practices" for the assessment of mast steps/pillars or chainplates

NOTE 1 Other engineering methods can be used provided the design loads and design stresses are used.

This document is applicable to craft with a hull length L up to 24 m but it can also be applied to craft up

to 24 m load line length.

NOTE 2 The load line length is defined in the OMI "International Load Lines Convention 1966/2005", it is

smaller than L . This length also sets up, at 24 m, the lower limit of several IMO conventions.

Scantlings derived from this document are primarily intended to apply to recreational craft, including

charter vessels.

This document is not applicable to racing craft designed only for professional racing.

This document only considers the loads exerted when sailing. Any loads that may result from other

situations are not considered in this document.

Throughout this document, and unless otherwise specified, dimensions are in (m), areas in (m ), masses

2 2

in (kg), forces in (N), moments in (N m), stresses and elastic modulus in N/mm (1 N / mm = 1 Mpa).

Unless otherwise stated, the craft is assessed in fully loaded ready for use condition.

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 12215-5:2019, Small craft — Hull construction and scantlings — Part 5: Design pressures for monohulls,

design stresses, scantlings determination
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:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
© ISO 2020 – All rights reserved 1
---------------------- Page: 7 ----------------------
ISO 12215-10:2020(E)
3.1
design categories

description of the sea and wind conditions for which a craft is assessed to be suitable

Note 1 to entry: The design categories are defined in ISO 12217 (all parts).

Note 2 to entry: The definitions of the design categories are in line with the European Recreational Craft Directive

2013/53/EU.
[SOURCE: ISO 12215-5:2019, 3.1]
3.2
loaded displacement
LDC

mass of water displaced by the craft, including all appendages, when in the fully loaded ready-for-use

condition

Note 1 to entry: The fully loaded ready-for-use condition is further defined in ISO 8666.

[SOURCE: ISO 12215-5:2019, 3.2]
3.3
sailing craft
craft for which the primary means of propulsion is wind power
Note 1 to entry: It is further defined in ISO 8666.
[SOURCE: ISO 12215-5:2019, 3.3, modified — Note 2 to entry deleted.]
3.4
monohull
craft with only one hull
3.5
multihull

craft with two or more hulls with a connecting wet deck/platform or beams above the loaded waterline,

as opposed to a tunnel boat or scow
3.6
mast step

element fitted at the bottom of the mast that supports the mast compression and transmits it to the rest

of the structure
3.7
mast pillar
pillar

in a deck stepped rig, structural element that transmits the mast compression to the rest of the

structure
3.8
chainplate
rig attachment

component(s) to which the rig elements are attached, transmitting their load to the rest of the structure,

including tie rods where relevant
EXAMPLE Metal chainplate, strapped composite chainplate,
Note 1 to entry: See Annex D.
2 © ISO 2020 – All rights reserved
---------------------- Page: 8 ----------------------
ISO 12215-10:2020(E)
3.9
connection

all elements or group of elements connecting the rig

attachment to the structure of the craft
EXAMPLE Bolts, lamination.
Note 1 to entry: Some of these elements can be part of the chainplate.
3.10
m condition
LDC
maximum load condition corresponding to the loaded displacement (3.2)
4 Symbols

Unless specified otherwise, the symbols, factors and parameters given in Table 1 apply.

Table 1 — Symbols, factors, parameters
Symbol Unit Designation/Meaning of symbol Reference
1 - Main dimensions of the craft
Beam between centers of buoyancy: between center of buoyancy of

B m hulls, for catamarans; and between C of center hull and C of float, for Table 5, Fig 3

CB B B
trimarans
B m Beam between chainplates (from port to starboard) Table C.1, Fig 3
B m Beam of hull It 1 of Table 5
GZ m Righting lever at 30° heel for monohulls Table 5
L m Length of waterline in m condition 7.5, Table 10
WL LDC
V m Height of craft center of gravity above T bottom Table 5, Fig 3
CG C
m kg Loaded displacement mass (3.2) or condition (3.10) 3.2, Clause 13
LDC
n 1 Number of persons hiking It 1 of Table 5
T m Draught of canoe body Table 5, Fig 3
2 - Main dimensions of the rig and connected data
A m Sail area, index i defining the sail name or combination Tables 5 to 8 etc.

F N Aerodynamic force, index i defining which force it corresponds to Tables 5 to 8

F N Design compression force on single mast step/pillar 8.4. Annex C
DMC
Design compression force on mast step/pillar of two-masted rig where
F N 8.4. Annex C
DMCi
index i = 1 or 2
M Nm Design moment under sail Tables 5 and 6
M Nm Heeling moment, where index i = , , Tables 5 and 6
Hi UP MAX, BROACH,DOWN
M Nm Righting moment, where index i = , ϕ , Table 5
Ri UP UP MAX
Design apparent wind speed, in knots, at the center of area of sails,
V knots Tables 5 and 7
ACEK i
where index i stands for sail configuration S
Design apparent wind speed, in m/s, at the center of area of sails,
V m/s Tables 5 and 7
ACEM i
where index i stands for sail configuration S
m/s Design apparent wind speed at mast top, where index i stands for sail
V Note 5 in Table 5
AMT i
(knots) configuration S
See Table 8 for detailed dimensions of rig, areas, etc.
© ISO 2020 – All rights reserved 3
---------------------- Page: 9 ----------------------
ISO 12215-10:2020(E)
Table 1 (continued)
Symbol Unit Designation/Meaning of symbol Reference
3 - Factors
k 1 Design category factor for rig It 5 of Table 3
DCR
k 1 Dynamic sail and rig factor It 1 of Table 10
DSR
k 1 Foresail center of pressure height factor It 1of Table 9
k 1 Mainsail center of pressure height factor It 3 of Table 9
HMS
k 1 Load case factor Tables 3 and 7
k 1 Material factor It 3 of Table 3
MAT
k 1 Roach factor Table 8
ROACH

k 1 Forestay or inner forestay sag factor = stay sag sagitta/stay length It 3 of Table 10

SAGF
k 1 Mainsail leech sag factor It 3 of Table 10
SAGM
k 1 Factor assessing heel angle of multihulls It 1 of Table 5
4 - Other variables
S 1 Sail configuration where i is the configuration index Table 7
S 1 Safety factor against i, the index i being y (yield) or u (ultimate) Table 4

σ ,, τ N/mm Direct or shear stress, where i may be LIM, u, uw, yw, uc, ut, uf Table 3

i i
ϕ degree Heel angle, which may be 30° for monohulls or ϕ for multihulls Table 5
LIM
5 Application of the document
5.1 General

This document allows the determination of the design loads and design stresses on rig elements

of sailing small craft and to assess the design loads on mast step/pillar and chainplates and their

connection to the craft's structure:
1) by a simplified method, or
2) by a developed method.
These methods are defined step by step in Table 2.

The developed method also allows to determine the rig loads needed to assess the global loads in the

structure of multihulls in ISO 12215-7:2020.
5.2 The simplified method

Clause 14 requires that the mast/rig manufacturer provide the design load on mast steps/pillars and

on each rig element, the dimensions of end fittings, etc. assessed according to 7.1.3. If this information

is not available, the "Simplified method" applies through "Established practice" Annexes: Annex C for

"basic" or "enhanced" methods for mast steps/pillars, or Annex D for chainplates or their connections.

5.3 The developed method

This method involves the full determination of the design loads on mast steps/pillars and on each rig

element, the dimensions of end fittings, etc. assessed according to Clause 7. The assessment of the mast

step(s), mast pillar(s), chainplates, and their connections to the craft shall then be checked either by the

4 © ISO 2020 – All rights reserved
---------------------- Page: 10 ----------------------
ISO 12215-10:2020(E)

"Established practice" methods of Annexes C and D or by any relevant engineering method, including

finite elements methods (FEM).

NOTE The actual dimensioning of mast and rig being a complex mast bending and buckling problem, where

the tuning of rig elongation is paramount, mast scantlings are purposely left out of the scope of this document,

even if the values of the loads defined is a useful information.
5.4 Steps of the methods and corresponding clauses of this document

Table 2 sums up the steps for both methods and gives the corresponding Clauses of this document.

Table 2 — Assessment methods
Step Methods Clause & Table
1- SIMPLIFIED METHOD for mast step/pillar or chainplate 5.2
1.1 Design stress determination Clause 6 and Table 3
If no information is available from the mast/rig manufacturer/provider, the
"Established practice" methods of Annex C -"basic" or "enhanced"- allow a sim-

1.2 ple determination of the design compression force F and scantlings of mast Annex C

DMC

steps/pillars and their connections to the structure. Tables C.4 and C.5 also give

examples of mast step/pillar floor calculation according to the design force.

1.3 For chainplates and their connection, use the "Established practice" of Annex D Annex D

1.4 Structural components to be assessed – mast step or chainplate Clause 9
1.5 Use of the Annexes for the simplified method Clause 10
1.6 Application of this document and application sheet Clause 12, Annex A
1.7 Information in the owner's manual Clause 13

1.8 Information to be given to the boatbuilder from rig/mast manufacturer/provider Clause 14

2- DEVELOPED METHOD for rig load, mast step/pillar or chainplate
5.3
Computation of all the loads in the rig
2.1 Design stress determination Clause 6 and Table 3
Developed method - General assessments, design moment Clause 7 and:
Determination of the design moments/forces according to sail configuration S :

— Formulas for the determination of upwind design moments and forces 7.2 and Table 5

— Formulas for the determination of downwind design moments and forces 7.2 and Table 6

2.2
— Sail configurations, design heeling/righting moments and apparent wind
7.2 and Table 7
speed
— Rig dimensions and default values for dimensions, areas and point of
7.3 and Table 8
application
— Transverse forces on sails 7.5 and Table 9
Design loads in rigging elements: Clause 8 and:

2.3 — Forces in forestay, inner forestay, mainsail leech and halyards 8.2 and Table 10

— Forces in backstay or running backstay or equivalent 8.3 and Table 10
2.4 Structural components to b
...

NORME ISO
INTERNATIONALE 12215-10
Première édition
2020-11
Petit navires — Construction de la
coque et échantillonnage —
Partie 10:
Charges dans le gréement et points
d'attache du gréement dans les
bateaux à voiles
Small craft — Hull construction and scantlings —
Part 10: Rig loads and rig attachment in sailing craft
Numéro de référence
ISO 12215-10:2020(F)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 12215-10:2020(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2020

Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette

publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,

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Publié en Suisse
ii © ISO 2020 – Tous droits réservés
---------------------- Page: 2 ----------------------
ISO 12215-10:2020(F)
Sommaire Page

Avant-propos ................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Domaine d'application ................................................................................................................................................................................... 1

2 Références normatives ................................................................................................................................................................................... 1

3 Termes et définitions ....................................................................................................................................................................................... 2

4 Symboles ....................................................................................................................................................................................................................... 3

5 Application du document ............................................................................................................................................................................ 4

5.1 Dispositions générales ..................................................................................................................................................................... 4

5.2 La méthode simplifiée ...................................................................................................................................................................... 4

5.3 La méthode développée .................................................................................................................................................................. 5

5.4 Les étapes des méthodes et les articles correspondants de ce document .......................................... 5

6 Méthode simplifiée et développée — Contraintes de conception .....................................................................6

6.1 Dispositions générales ..................................................................................................................................................................... 6

6.2 Contraintes de conception/facteurs de sécurité ........................................................................................................ 8

7 Méthode développée — Évaluation générale, moment de conception ........................................................9

7.1 Dispositions générales ..................................................................................................................................................................... 9

7.1.1 Sujets généraux sur la conception du gréement................................................................................... 9

7.1.2 Configurations de voilure ......................................................................................................................................10

7.1.3 Charges dans le gréement et informations de réglage devant être fournies ............11

7.2 Moment de conception M : moment de redressement ou de gîte ..........................................................11

7.2.1 Dispositions générales .............................................................................................................................................11

7.2.2 Principe de conception ............................................................................................................................................12

7.2.3 Points sur les multicoques/voiliers à stabilité de forme correspondant au

cas b), c’est-à-dire avec M < M ............................................................................................................

H1 R UP1 15
7.2.4 Force longitudinale au vent arrière F et moment d’assiette sur le
ADOWN
nez M , lorsqu’on navigue sous spinnaker seul — «Normal» (S ) ou
HDOWN C6

«Exceptionnel» (S ) ........................................................................................................................................... .......16

7.2.5 Moment de redressement maximal M cas exceptionnel, vent de
RMAX,

travers sous spinnaker.............................................................................................................................................16

7.2.6 Force de gîte F et moment de gîte M en cas de départ au lof
ABROACH HBROACH

sous spinnaker, cas exceptionnel ....................................................................................................................16

7.2.7 Configurations de voilures minimales et moment de redressement/de gîte

à analyser ............................................................................................................................................................................17

7.3 Dimensions du gréement et valeurs par défaut des surfaces, forces et leurs points

d’application .................. .........................................................................................................................................................................19

7.4 Mâts-aile ....................................................................................................................................................................................................24

7.5 Forces résultantes dans les voiles .......................................................................................................................................25

8 Charges dans les éléments du gréement — Méthode développée .................................................................26

8.1 Dispositions générales ..................................................................................................................................................................26

8.2 Force dans l’étai avant, le bas étai, la chute de grand-voile et les drisses .........................................26

8.2.1 Dispositions générales .............................................................................................................................................26

8.2.2 Force dans l’étai avant, le bas étai, la ralingue de grand-voile et les drisses

liées à la flèche ................................................................................................................................................................27

8.2.3 Force dans l’étai avant pour équilibrer la composante longitudinale des
forces provenant des haubans angulés vers l’arrière, pataras/bastaques,

chute de grand-voile ..................................................................................................................................................27

8.3 Force dans le pataras, les bastaques, ou équivalent.............................................................................................27

8.3.1 Dispositions générales .............................................................................................................................................27

8.3.2 Gréement fractionné avec pataras, pas de bastaque et des barres de flèche

angulées vers l’arrière ..............................................................................................................................................28

8.3.3 Cas des gréements sans pataras ni bastaque .......................................................................................28

© ISO 2020 – Tous droits réservés iii
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ISO 12215-10:2020(F)

8.4 Compression dans le pied de mât/épontille ..............................................................................................................30

8.4.1 Dispositions générales .............................................................................................................................................30

8.4.2 Compression initiale dans le mât due à la pré compression ...................................................30

8.4.3 Compression du mât due à la gîte ou au départ au lof .................................................................31

8.4.4 Compression de conception du pied de mât/épontille ...............................................................31

8.4.5 Sujets de détail sur le pied de mât/épontille .......................................................................................31

8.5 Charges de conception finales sur les éléments du gréement ....................................................................31

9 Composants structurels à évaluer — Méthode simplifiée ou développée ............................................32

9.1 Dispositions générales ..................................................................................................................................................................32

9.2 Pieds de mât et épontilles et leur liaison à la structure du bateau .........................................................32

9.3 Cadènes et leur liaison à la structure du bateau .....................................................................................................33

9.4 Détails de conception des cadènes et de leur liaison à la structure .......................................................33

9.4.1 Dispositions générales .............................................................................................................................................33

9.4.2 Cadènes sanglées en stratifié .............................................................................................................................34

10 Application de la méthode simplifiée ..........................................................................................................................................34

11 Application de la méthode développée ......................................................................................................................................35

11.1 Dispositions générales ..................................................................................................................................................................35

11.2 Guide général pour l'évaluation par des procédures numériques en 3-D ........................................35

11.2.1 Dispositions générales .............................................................................................................................................35

11.2.2 Propriétés de matériaux .........................................................................................................................................35

11.2.3 Hypothèses de limites ..............................................................................................................................................35

11.2.4 Application des charges ..........................................................................................................................................35

11.2.5 Idéalisation du modèle ............................................................................................................................................35

11.3 Évaluation par des méthodes basées sur la «résistance des matériaux» ..........................................36

12 Application de ce document ..................................................................................................................................................................36

13 Informations à donner dans le manuel du propriétaire ..........................................................................................36

14 Informations pour constructeur de bateau ...........................................................................................................................37

Annexe A (informative) Déclaration d’application de l’ISO 12215-10 ...........................................................................38

Annexe B (informative) Informations sur les métaux et les boulons ..............................................................................40

Annexe C (normative) «Pratique établie» simplifiée pour l’évaluation du pied de mât/épontille ..45

Annexe D (normative) Méthode simplifiée de «pratique établie» pour l’évaluation des

cadènes et de leur liaison .........................................................................................................................................................................54

Annexe E (informative) Calcul simplifié de «pratique établie» des éléments du gréement

transversal ...............................................................................................................................................................................................................77

Bibliographie ...........................................................................................................................................................................................................................85

iv © ISO 2020 – Tous droits réservés
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ISO 12215-10:2020(F)
Avant-propos

L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes

nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est

en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude

a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,

gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.

L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui

concerne la normalisation électrotechnique.

Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont

décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents

critères d'approbation requis pour les différents types de documents ISO. Le présent document a été

rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www

.iso .org/ directives).

L'attention est attirée sur le fait que certains des éléments du présent document peuvent faire l'objet de

droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable

de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant

les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de

l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de

brevets reçues par l'ISO (voir www .iso .org/ brevets).

Les appellations commerciales éventuellement mentionnées dans le présent document sont données

pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un

engagement.

Pour une explication de la nature volontaire des normes, la signification des termes et expressions

spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion

de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles

techniques au commerce (OTC), voir le lien suivant: www .iso .org/ iso/ fr/ avant -propos.

Le présent document a été élaboré par le comité technique ISO/TC 188, Petits navires.

Une liste de toutes les parties de la série ISO 12215 se trouve sur le site web de l’ISO.

Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent

document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes

se trouve à l’adresse www .iso .org/ fr/ members .html.
© ISO 2020 – Tous droits réservés v
---------------------- Page: 5 ----------------------
ISO 12215-10:2020(F)
Introduction

La raison qui sous-tend la préparation de la série ISO 12215 est que les règles d'échantillonnage

et les pratiques recommandées pour les petits navires diffèrent considérablement, limitant ainsi

l'acceptabilité générale mondiale des bateaux.

Ce document a été défini en fonction des exigences minimales de la pratique actuelle.

Le dimensionnement selon ce document est considéré comme reflétant la pratique courante, à condition

que le bateau soit correctement manœuvré dans le sens du bon sens marin et équipé et utilisé à une

vitesse appropriée à l'état de mer dominant.

Ce document n'est pas une norme de conception et les concepteurs/constructeurs sont fortement avertis

de ne pas tenter de concevoir un bateau de sorte que presque tous les éléments structurels soient juste

conformes.

La liaison entre le point d’attache du gréement et la structure est requise d’être plus solide que le point

d’attache lui-même. On considère donc qu'une surcharge imprévue n'entraînera pas son arrachage de la

structure et que l'étanchéité sera maintenue.

NOTE Dans la présente version française, le terme « load » a été traduit par « charge » mais pourrait être

également traduit par « effort » ou « force » selon le contexte.
vi © ISO 2020 – Tous droits réservés
---------------------- Page: 6 ----------------------
NORME INTERNATIONALE ISO 12215-10:2020(F)
Petit navires — Construction de la coque et
échantillonnage —
Partie 10:
Charges dans le gréement et points d'attache du gréement
dans les bateaux à voiles
1 Domaine d'application
Le présent document spécifie des méthodes pour la détermination:

— des charges de conception et des contraintes de conception dans les éléments du gréement; et

— des charges et des échantillonnages des points d’attache du gréement et du pied de mât/épontille;

sur les voiliers monocoques et multicoques.

Il donne également, dans des Annexes, des «pratiques établies» pour l’évaluation des pieds de mât/

épontilles ou des cadènes.

NOTE 1 D'autres méthodes d'ingénierie peuvent être utilisées à condition que les charges et les contraintes de

conception soient utilisées.

Ce document est applicable aux bateaux d’une longueur de coque L inférieure ou égale à 24 m mais il

peut également s'appliquer aux bateaux d’une longueur de ligne de charge inférieure ou égale 24 m.

NOTE 2 La longueur de la ligne de charge (longueur de référence) est définie dans la «Convention internationale

sur les lignes de charge 1966/2005» de l'OMI, elle est inférieure à L . Cette longueur établit également, à 24 m, la

limite inférieure de plusieurs conventions de l’OMI.

Les échantillonnages provenant du présent document sont principalement destinés à s’appliquer sur les

bateaux de plaisance, y compris les bateaux de location avec équipage (charter).

Ce document n'est pas applicable aux bateaux de course conçus uniquement pour des courses

professionnelles.

Ce document ne considère que les charges exercées lors de la navigation. Les charges pouvant résulter

d'autres situations ne sont pas prises en compte dans ce document.

Dans tout ce document, sauf indication contraire, les dimensions sont en (m), les surfaces en (m ), les

masses en (kg), les forces en (N), les moments en (Nm), les contraintes et modules d'élasticité en N/

2 2

mm (1 N / mm = 1 Mpa) Sauf indication contraire, le bateau doit être évalué en condition de pleine

charge prête à l’emploi.
2 Références normatives

Les documents suivants sont référencés dans le présent document de sorte que tout ou partie de leur

contenu en constitue des exigences. Pour les références datées, seule l'édition citée s'applique. Pour les

références non datées, la dernière édition du document de référence s'applique (y compris les éventuels

amendements).

ISO 12215-5:2019, Petits navires — Construction de coques et échantillonnage — Partie 5: Pressions de

conception pour monocoques, contraintes de conception, détermination de l'échantillonnage

© ISO 2020 – Tous droits réservés 1
---------------------- Page: 7 ----------------------
ISO 12215-10:2020(F)
3 Termes et définitions

Pour les besoins du présent document, les termes et définitions suivants s'appliquent.

L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en

normalisation, consultables aux adresses suivantes:

— ISO Online browsing platform: disponible à l'adresse http:// www .iso .org/ obp

— IEC Electropedia: disponible à l'adresse http:// www .electropedia .org/
3.1
catégories de conception

description des conditions de mer et de vent auxquelles le bateau est considéré comme approprié

Note 1 à l'article: Les catégories de conception sont définies dans l’ISO 12217 (toutes les parties).

Note 2 à l'article: Les définitions des catégories de conception sont en ligne avec la directive européenne 2013/53/

UE sur les bateaux de plaisance.
[SOURCE: ISO 12215-5:2019, 3.1]
3.2
déplacement en charge
LDC

masse de l’eau déplacée par le bateau, y compris tous ses appendices, lorsqu'il est en condition de charge

maximale prêt à l’emploi

Note 1 à l'article: La condition de charge maximale prête à l’emploi est définie plus complètement dans l’ISO 8666.

[SOURCE: ISO 12215-5:2019, 3.2.]
3.3
bateau à voiles
Voiliers
bateau dont le moyen principal de propulsion est la force du vent
Note 1 à l'article: Cette définition est plus complète dans l’ISO 8666

[SOURCE: ISO 12215‑5:2019, 3.3, modifiée — La Note 2 à l’article a été supprimée.]

3.4
monocoque
bateau ne comportant qu’une seule coque
3.5
multicoque

bateau comportant plusieurs coques avec une nacelle/plateforme ou des bras de liaison situés au-

dessus de la flottaison, par opposition à un bateau tunnel ou un scow
3.6
pied de mât

élément installé sous le mât et qui supporte la compression du mât et la transmet au reste de la structure

3.7
épontille de mât
épontille

sur un bateau où le mât est posé sur le pont, élément structurel qui transmet la compression du mât au

reste de la structure
2 © ISO 2020 – Tous droits réservés
---------------------- Page: 8 ----------------------
ISO 12215-10:2020(F)
3.8
cadène
point d’attache du gréement

élément(s) sur lequel les éléments du gréement sont attachés et qui transmet leurs charges au reste de

la structure, cela comprend, le cas échéant, les tirants
EXEMPLE Cadène métallique, cadène sanglée en composite
Note 1 à l'article: voir l’Annexe D.
3.9
liaison

tous les éléments ou groupe d'éléments reliant le

point d’attache du gréement à la structure du bateau
EXEMPLE Boulons, stratification.
Note 1 à l'article: Certains de ces éléments peuvent faire partie de la cadène
3.10
condition m
LDC
condition de charge maximale correspondant au déplacement en charge (3.2)
4 Symboles

Sauf spécification contraire, les symboles, facteur et paramètres indiqués au Tableau 1 s’appliquent.

Tableau 1 — Symboles, facteurs, paramètres
Symbole Unité Désignation/Signification du symbole Référence
1 – Dimensions principales du bateau

Bau entre les centres de flottabilité: distance entre les centres de Tableau 5, Fig 3

B m flottabilité des coques pour un catamaran et entre le C de la coque
CB B
centrale et celui du flotteur pour un trimaran
B m Bau entre cadènes (de bâbord à tribord) Tableau C.1, Fig 3
B m Bau de coque Pt 1, Tableau 5,
GZ m Bras de levier de redressement à 30°gîte pour les monocoques Tableau 5
L m Longueur de la flottaison en condition m 7.5, Tableau 10
WL LDC

V m Hauteur du centre de gravité du bateau au-dessus du fond de T Tableau 5, Fig 3

CG C
m kg Masse de déplacement en charge (3.2) ou condition (3.10) 3.2, Article 13
LDC
n 1 Nombre de personnes au rappel Pt 1, Tableau 5,
T m Tirant d’eau de carène Tableau 5, Fig 3
2 – Dimensions principales du gréement et données qui y sont liées

Surface de voilure, l’indice i définissant le nom de la voile ou de sa com- Tableau 5 à 8, etc.

A m
binaison

F N Force aérodynamique, l’indice i définissant à quelle force elle correspond Tableau 5 à 8

Force de compression de conception sur le pied de mat/épontille, d’un 8.4, Annexe C

F N
DMC
mat unique

Force de compression de conception sur pied de mat/épontille pour un 8.4, Annexe C

F N
DMCi
gréement à deux mats, où l’indice i = 1 ou 2
M Nm Moment de conception sous voiles Tableaux 5 et 6
M Nm Moment, de gîte où l’indice i = , , Tableaux 5 et 6
Hi UP MAX, BROACH, DOWN
M Nm Moment de redressement, où l’indice i = , ϕ , Tableau 5
Ri UP UP MAX
© ISO 2020 – Tous droits réservés 3
---------------------- Page: 9 ----------------------
ISO 12215-10:2020(F)
Tableau 1 (suite)
Symbole Unité Désignation/Signification du symbole Référence

Vitesse du vent apparent de conception, en nœuds, au centre de voilure, Tableaux 5 et 7

V nœuds
ACEK i
où l’indice i correspond à la configuration de voilure S

Vitesse du vent apparent de conception, en m/s, au centre de voilure, où Tableaux 5 et 7

V m/s
ACEM i
l’indice i correspond à la configuration de voilure S

m/s Vitesse du vent apparent de conception au sommet du mât, où l’indice Note 5 du

AMT i
(nœuds) correspond à la configuration de voilure S Tableau 5
Voir le Tableau 8 pour les dimensions détaillées du gréement, des surfaces, etc.
3 - Facteurs
k 1 Facteur de catégorie de conception pour le gréement Pt 5 du Tableau 3
DCR
k 1 Facteur de charge dynamique pour la voilure et le gréement Pt 1 du Tableau10
DSR

k 1 Facteur de hauteur de centre de pression pour la voile d’avant Pt 1 du Tableau9

k 1 Facteur de hauteur de centre de pression pour la grand-voile Pt 3 du Tableau9

HMS
k 1 Facteur de cas de chargement Tableaux 3 et 7
k 1 Facteur de matériau Pt 3 du Tableau 3
MAT
k 1 Facteur de rond de chute de grand-voile Tableau 8
ROACH

k 1 Facteur de flèche de l’étai/bas étai = flèche d’étai/longueur d’étai Pt 3 Tableau 10

SAGF
k 1 Facteur de flèche de la chute de grand‑voile Pt 3 Tableau 10
SAGM
k 1 Factor d’évaluation d’angle de gîte de multicoque Pt 1 du Tableau5
4 – Autres variables
S 1 Configuration de voilure où i est l’indice de configuration Tableau 7

S 1 Facteur de sécurité / i, où l’indice i est y (yield) ou u (ultimate) Tableau 4

Contrainte directe ou de cisaillement, où i peut être LIM, u, uw, yw, Tableau 3
σ ,, τ N/mm
i i
uc, ut, uf
Angle de gîte qui peut être 30°pour les monocoques ou ϕ pour les Tableau 5
LIM
ϕ degré
multicoques
5 Application du document
5.1 Dispositions générales

Ce document permet de déterminer les charges de conception et les contraintes de conception sur les

éléments de gréement d'un voilier et d’évaluer les contraints de conception sur le pied de mât/épontille,

les cadènes et leur liaison à la structure du bateau:
1) par une méthode simplifiée où;
2) par une méthode développée.
Ces méthodes sont définies étape par étape au Tableau 2.

La méthode développée permet également de connaître les charges dans le gréement nécessaires pour

évaluer les charges globales dans la structure des multicoques dans l’ISO 12215-7:2020.

5.2 La méthode simplifiée

L’Article 14 requiert que le fabricant du mât/gréement indique les charges de conception sur le pied

de mât/épontille et sur chaque élément du gréement, les dimensions des embouts, etc., évaluées

conformément au 7.1.3. Si cette information n’est pas disponible, la «Méthode simplifiée» s’applique à

l’aide des Annexes de «Pratique établie»: l’Annexe C pour la méthode «De base» ou «Améliorée» pour le

pied de mât/épontille, ou l’Annexe D pour les cadènes ou leur liaison.
4 © ISO 2020 – Tous droits réservés
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ISO 12215-10:2020(F)
5.3 La méthode développée

Cette méthode implique la détermination complète des charges de conception sur le pied de mât/

épontille et sur chaque élément du gréement, les dimensions des embouts évalués conformément

à l’Article 7. L'évaluation du ou des pieds de mât, cadènes et de leur liaison au bateau doit ensuite

être vérifiée soit par les méthodes de «Pratique établie» des Annexes C et D, soit par toute méthode

d'ingénierie pertinente, y compris la méthode des éléments finis (FEM).

NOTE Le dimensionnement effectif du mât et du gréement étant un problème complexe de flexion et de

flambage du mât, où le réglage de l'allongement du gréement est primordial, il est volontairement exclu du champ

d’application de ce document, même si les valeurs des charges définies
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 12215-10
ISO/TC 188
Small craft — Hull construction and
Secretariat: SIS
scantlings —
Voting begins on:
2019-11-26
Part 10:
Voting terminates on:
Rig loads and rig attachment in
2020-01-21
sailing craft
Petit navires — Contruction de la coque et échantillonnage —
Partie 10: Charges dans le gréement et points d'attache du gréement
dans les bateaux à voiles
ISO/CEN PARALLEL PROCESSING
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 12215-10:2019(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 2019
---------------------- Page: 1 ----------------------
ISO/FDIS 12215-10:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 12215-10:2019(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

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

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

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

4 Symbols .......................................................................................................................................................................................................................... 3

5 Application of the document .................................................................................................................................................................... 4

5.1 General ........................................................................................................................................................................................................... 4

5.2 The simplified method ..................................................................................................................................................................... 4

5.3 The developed method .................................................................................................................................................................... 4

5.4 Steps of the methods and corresponding clauses of this document ......... ................................................ 5

6 Simplified and developed methods — Design stresses ................................................................................................ 6

6.1 General ........................................................................................................................................................................................................... 6

6.2 Design load vs safety factor .......................................................................................................................................................... 7

7 Developed method — General assessments, design moment ............................................................................... 8

7.1 General ........................................................................................................................................................................................................... 8

7.1.1 General topics on rigging design ........................................................................................................................ 8

7.1.2 Sail configurations: ........................................................................................................................................................ 9

7.1.3 Rigging loads and adjustment information to be provided ........................................................ 9

7.2 Design moment M : righting or heeling moment ..................................................................................................10

7.2.1 General...................................................................................................................................................................................10

7.2.2 Principle of design .......................................................................................................................................................10

7.2.3 Topics on multihulls/form stable sailing craft corresponding to case b) i.e.

with M < M .......................................................................................................................................................13

H1 R UP1
7.2.4 Downwind longitudinal force F and nose trimming moment M ,
DOWN HDOWN

running under spinnaker alone — "Normal" (S ) or "exceptional" (S ) ..................14

c6 c8
7.2.5 Maximum righting moment M , exceptional case, reaching under
RMAX

spinnaker .............................................................................................................................................................................14

7.2.6 Heeling force F and heeling moment M while broaching
BROACH HBOACH

under spinnaker, exceptional case .................................................................................................................14

7.2.7 Minimum sail configuration and righting/heeling moment to be analyzed .............14

7.3 Rig dimensions, and default values for areas, forces and points of application ..........................15

7.4 Wing masts ..............................................................................................................................................................................................21

7.5 Resultant forces in sails ................................................................................................................................................................22

8 Loads in rigging elements — Developed method ............................................................................................................23

8.1 General ........................................................................................................................................................................................................23

8.2 Force in forestay, inner forestay, mainsail leech and on halyards ............................................................23

8.2.1 General...................................................................................................................................................................................23

8.2.2 Force in forestay, inner forestay, mainsail leech and on halyards connected

with sag .................................................................................................................................................................................24

8.2.3 Force in forestay to balance the longitudinal component of forces from aft

set shrouds, fixed/running backstays, mainsail leech ..................................................................24

8.3 Force in backstay, running backstays, or equivalent ...........................................................................................24

8.3.1 General...................................................................................................................................................................................24

8.3.2 Fractional rig with fixed backstay, no running backstay and aft angled

spreaders .............................................................................................................................................................................25

8.3.3 Case of rigs without fixed nor running backstay ...............................................................................25

8.4 Compression in the mast step/pillar ................................................................................................................................27

8.4.1 General...................................................................................................................................................................................27

8.4.2 Initial mast compression due to pre-stressing ...................................................................................27

8.4.3 Mast compression due to heeling or broaching .................................................................................28

© ISO 2019 – All rights reserved iii
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ISO/FDIS 12215-10:2019(E)

8.4.4 Design compression in the mast step/pillar .........................................................................................28

8.4.5 Detail topics on mast step/pillar ....................................................................................................................28

8.5 Final design load on rig elements ........................................................................................................................................28

9 Structural components to be assessed — Simplified or developed method .......................................29

9.1 General ........................................................................................................................................................................................................29

9.2 Mast steps and mast pillars and their connection to the craft's structure .......................................29

9.3 Chainplates and their connections to the craft's structure............................................................................29

9.4 Design details of chainplates and their connection to the structure .....................................................30

9.4.1 General...................................................................................................................................................................................30

9.4.2 Strapped FRP chainplates .....................................................................................................................................30

10 Application of the simplified method ..........................................................................................................................................31

11 Application of the developed method .........................................................................................................................................31

11.1 General ........................................................................................................................................................................................................31

11.2 General guidance for assessment by 3-D numerical procedures .............................................................31

11.2.1 General...................................................................................................................................................................................31

11.2.2 Material properties .....................................................................................................................................................32

11.2.3 Boundary assumptions ...........................................................................................................................................32

11.2.4 Load application ............................................................................................................................................................32

11.2.5 Model idealization .......................................................................................................................................................32

11.3 Assessment by ‘strength of materials’ based methods .....................................................................................32

12 Application of this document ...............................................................................................................................................................32

13 Information in the owner's manual ...............................................................................................................................................32

14 Information to the boat builder .........................................................................................................................................................33

Annex A (informative) Application sheet of ISO 12215-10 ........................................................................................................34

Annex B (informative) Information on metals and bolts .............................................................................................................36

Annex C (normative) Simplified "established practice" for mast step/pillar assessment ........................40

Annex D (normative) Simplified "established practice" for the assessment of

chainplatesand their connection ......................................................................................................................................................47

Annex E (informative) Simplified "established practice" calculation oftransverse rig

elements — Examples ..................................................................................................................................................................................69

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2013/53/EU aimed to be covered ............................................................................77

Bibliography .............................................................................................................................................................................................................................78

iv © ISO 2019 – All rights reserved
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ISO/FDIS 12215-10:2019(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 ISO/TC 188, Small craft.
A list of all parts in the ISO 12215 series can be found on the ISO website.

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.
© ISO 2019 – All rights reserved v
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ISO/FDIS 12215-10:2019(E)
Introduction

The reason underlying the preparation of the ISO 12215 series is that scantlings rules and recommended

practices for small craft differ considerably, thus limiting the general worldwide acceptability of craft.

This document has been set towards the minimal requirements of the current practice.

The dimensioning according to this document is regarded as reflecting current practice, provided

the craft is correctly handled in the sense of good seamanship and equipped and operated at a speed

appropriate to the prevailing sea state.

This document is not a design standard and designers/builders are strongly cautioned from attempting

to design craft such that nearly all structural components only just comply.

The connection between the rig attachment and the structure is required to be stronger than the rig

attachment itself. It is therefore considered that unforeseen overload will not entail its detachment

from the structure, and that the watertight integrity will be maintained.
vi © ISO 2019 – All rights reserved
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 12215-10:2019(E)
Small craft — Hull construction and scantlings —
Part 10:
Rig loads and rig attachment in sailing craft
1 Scope
This document specifies methods for the determination of:
— the design loads and design stresses on rig elements; and
— the loads and scantlings of rig attachments and mast steps/pillars;
on monohull and multihulls sailing craft.

It also gives, in Annexes, "established practices" for the assessment of mast steps/pillars or chainplates

NOTE 1 Other engineering methods can be used provided the design loads and design stresses are used.

This document is applicable to craft with a hull length L up to 24 m but it can also be applied to craft up

to 24 m load line length.

NOTE 2 The load line length is defined in the OMI "International Load Lines Convention 1966/2005", it is

smaller than L . This length also sets up, at 24 m, the lower limit of several IMO conventions.

Scantlings derived from this document are primarily intended to apply to recreational craft, including

charter vessels.

This document is not applicable to racing craft designed only for professional racing.

This document only considers the loads exerted when sailing. Any loads that may result from other

situations are not considered in this document.

Throughout this document, and unless otherwise specified, dimensions are in (m), areas in (m ), masses

2 2

in (kg), forces in (N), moments in (N m), stresses and elastic modulus in N/mm (1 N / mm = 1 Mpa).

Unless otherwise stated, the craft is assessed in fully loaded ready for use condition.

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 3506-1:— , Mechanical properties of corrosion-resistant stainless steel fasteners — Part 1: Bolts,

screws and studs

ISO 12215-5:2019, Small craft — Hull construction and scantlings — Part 5: Design pressures for monohulls,

design stresses, scantlings determination
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
1) Under preparation. Stage at the time of publication: ISO/FDIS 3506-1:2019.
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ISO/FDIS 12215-10:2019(E)

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

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
design categories

description of the sea and wind conditions for which a craft is assessed to be suitable

Note 1 to entry: The design categories are defined in ISO 12217 (all parts).

Note 2 to entry: The definitions of the design categories are in line with the European Recreational Craft Directive

2013/53/EU.
[SOURCE: ISO 12215-5:2019, 3.1]
3.2
loaded displacement
LDC

mass of water displaced by the craft, including all appendages, when in the fully loaded ready-for-use

condition

Note 1 to entry: The fully loaded ready-for-use condition is further defined in ISO 8666.

[SOURCE: ISO 12215-5:2019, 3.2]
3.3
sailing craft
craft for which the primary means of propulsion is wind power
Note 1 to entry: It is further defined in ISO 8666.
[SOURCE: ISO 12215-5:2019, 3.3, modified — Note 2 to entry deleted.]
3.4
monohull
craft with only one hull
3.5
multihull

craft with two or more hulls with a connecting wet deck/platform or beams above the loaded waterline,

as opposed to a tunnel boat or scow
3.6
mast step

element fitted at the bottom of the mast that supports the mast compression and transmits it to the rest

of the structure
mast pillar
pillar

in a deck stepped rig, structural element that transmits the mast compression to the rest of the

structure
3.8
chainplate
rig attachment

component(s) to which the rig elements are attached, transmitting their load to the rest of the structure,

including tie rods where relevant
EXAMPLE Metal chainplate, strapped composite chainplate,
2 © ISO 2019 – All rights reserved
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ISO/FDIS 12215-10:2019(E)
Note 1 to entry: See Annex D.
3.9
connection

all elements or group of elements connecting the rig

attachment to the structure of the craft
EXAMPLE Bolts, lamination.
Note 1 to entry: Some of these elements can be part of the chainplate.
3.10
m condition
LDC
maximum load condition corresponding to the loaded displacement (3.2)
4 Symbols

Unless specified otherwise, the symbols, factors and parameters given in Table 1 apply.

Table 1 — Symbols, factors, parameters
Symbol Unit Designation/Meaning of symbol Reference
1 - Main dimensions of the craft
Beam between centers of buoyancy: between center of buoyancy of

B m hulls, for catamarans; and between C of center hull and C of float, for Table 5, Fig 3

CB B B
trimarans
B m Beam between chainplates (from port to starboard) Table C.1, Fig 3
B m Beam of hull It 1 of Table 5
GZ m Righting lever at 30° heel for monohulls Table 5
L m Length of waterline in m condition 7.5, Table 10
WL LDC
V m Height of craft center of gravity above T bottom Table 5, Fig 3
CG C
m kg Loaded displacement mass (3.2) or condition (3.10) 3.2, Clause 13
LDC
n 1 Number of persons hiking It 1 of Table 5
T m Draught of canoe body Table 5, Fig 3
2 - Main dimensions of the rig and connected data
A m Sail area, index i defining the sail name or combination Tables 5 to 8 etc.

F N Aerodynamic force, index i defining which force it corresponds to Tables 5 to 8

F N Design compression force on single mast step/pillar 8.4. Annex C
DMC
Design compression force on mast step/pillar of two-masted rig where
F N 8.4. Annex C
DMCi
index i = 1 or 2
M Nm Design moment under sail Tables 5 and 6
M Nm Heeling moment, where index i = , , Tables 5 and 6
Hi UP MAX, BROACH,DOWN
M Nm Righting moment, where index i = , ϕ , Table 5
Ri UP UP MAX
Design apparent wind speed, in knots, at the center of area of sails,
V knots Tables 5 and 7
ACEK i
where index i stands for sail configuration S
Design apparent wind speed, in m/s, at the center of area of sails,
V m/s Tables 5 and 7
ACEM i
where index i stands for sail configuration S
m/s Design apparent wind speed at mast top, where index i stands for sail
V Note 5 in Table 5
AMT i
(knots) configuration S
See Table 8 for detailed dimensions of rig, areas, etc.
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ISO/FDIS 12215-10:2019(E)
Table 1 (continued)
Symbol Unit Designation/Meaning of symbol Reference
3 - Factors
k 1 Design category factor for rig It 5 of Table 3
DCR
k 1 Dynamic sail and rig factor It 1 of Table 10
DSR
k 1 Foresail center of pressure height factor It 1of Table 9
k 1 Mainsail center of pressure height factor It 3 of Table 9
HMS
k 1 Load case factor Tables 3 and 7
k 1 Material factor It 3 of Table 3
MAT
k 1 Roach factor Table 8
ROACH

k 1 Forestay or inner forestay sag factor = stay sag sagitta/stay length It 3 of Table 10

SAGF
k 1 Mainsail leech sag factor It 3 of Table 10
SAGM
k 1 Factor assessing heel angle of multihulls It 1 of Table 5
4 - Other variables
S 1 Sail configuration where i is the configuration index Table 7
S 1 Safety factor against i, the index i being y (yield) or u (ultimate) Table 4

s , σ ,, τ N/mm Direct or shear stress, where i may be LIM, u, uw, yw, uc, ut, uf Table 3

i i i
ϕ degree Heel angle, which may be 30° for monohulls or ϕ for multihulls Table 5
LIM
5 Application of the document
5.1 General

This document allows the determination of the design loads and design stresses on rig elements of

sailing small craft to assess the design loads on mast step/pillar and chainplates and their connection

to the craft's structure:
1) by a simplified method, or
2) by a developed method.
These methods are defined step by step in Table 2.

The developed method also allows to determine the rig loads needed to assess the global loads in the

structure of multihulls in ISO 12215-7:— .
5.2 The simplified method

Clause 14 requires that the mast/rig manufacturer provide the design load on mast steps/pillars and

on each rig element, the dimensions of end fittings, etc. assessed according to 7.1.3. If this information

is not available, the "Simplified method" applies through "Established practice" Annexes: Annex C for

"basic" or "enhanced" methods for mast steps/pillars, or Annex D for chainplates or their connections.

5.3 The developed method

This method involves the full determination of the design loads on mast steps/pillars and on each rig

element, the dimensions of end fittings, etc. assessed according to Clause 7. The assessment of the mast

step(s), mast pillar(s), chainplates, and their connections to the craft shall then be checked either by the

2) Under preparation. Stage at the time of publication: ISO/FDIS 12215-7:2019.
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ISO/FDIS 12215-10:2019(E)

"Established practice" methods of Annexes C and D or by any relevant engineering method, including

finite elements methods (FEM).

NOTE The actual dimensioning of mast and rig being a complex mast bending and buckling problem, where

the tuning of rig elongation is paramount, mast scantlings are purposely left out of the scope of this document,

even if the values of the loads defined is a useful information.
5.4 Steps of the methods and corresponding clauses of this document

Table 2 sums up the steps for both methods and gives the corresponding Clauses of this document.

Table 2 — Assessment methods
Step Methods Clause & Table
1- SIMPLIFIED METHOD for mast step/pillar or chainplate 5.2
1.1 Design stress determination Clause 6 and Table 3
If no information is available from the mast/rig manufacturer/provider, the
"Established practice" methods of Annex C -"basic" or "enhanced"- allow a sim-

1.2 ple determination of the design compression force F and scantlings of mast Annex C

DMC

steps/pillars and their connections to the structure. Tables C.4 and C.5 also give

examples of mast step/pillar floor calculation according to the design force.

1.3 For chainplates and their connection, use the "Established practice" of Annex D Annex D

1.4 Structural components to be assessed – mast step or chainplate Clause 9
1.5 Use of the Annexes for the simplified method Clause 10
1.6 Application of this document and application sheet Clause 12, Annex A
1.7 Information in the owner's manual Clause 13
1.8 Inform
...

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