SIST EN ISO 12215-6:2008
(Main)Small craft - Hull construction and scantlings - Part 6: Structural arrangements and details (ISO 12215-6:2008)
Small craft - Hull construction and scantlings - Part 6: Structural arrangements and details (ISO 12215-6:2008)
This part of ISO 12215 concerns structural details and structural components not explicitly included in ISO 12215-5, ISO 12215-7, ISO 12215-8 and ISO 12215-9. It applies to monohull and multihull small craft constructed from fibre reinforced plastics (FRP), aluminium or steel alloys, wood or other suitable boat building material, with a hull length, in accordance with ISO 8666, of up to 24 m. This part of ISO 12215 fulfils two functions. Firstly, it supports ISO 12215-5 by providing further explanations and calculation procedures and formulae. Secondly, it gives a number of examples of arrangements and structural details which illustrate principles of good practice. These principles provide a standard against which alternative arrangements and structural details can be benchmarked, using the equivalence criteria specified in this part of ISO 12215.
Kleine Wasserfahrzeuge - Rumpfbauweise und Dimensionierung - Teil 6: Bauanordnung und Details (ISO 12215-6:2008)
Dieser Teil von ISO 12215 betrifft die Bestimmung von Baudetails und Baukomponenten, die nicht ausdrücklich in ISO 12215 5; ISO 12215 7, ISO 12215 8 und ISO 12215 9 aufgeführt sind. Betroffen sind kleine Einrumpf- und Mehrrumpf-Wasserfahrzeuge, die aus glasfaserverstärkten Kunststoffen (GfK), Aluminium- oder Stahllegierungen, Holz oder anderen geeigneten Bootsbauwerkstoffen gebaut sind, mit einer Rumpflänge bis 24 m nach ISO 8666.
Dieser Teil von ISO 12215 erfüllt zwei Funktionen. Erstens unterstützt er ISO 12215 5, indem weitere Erklärungen und Kalkulationsschemata und Gleichungen bereitgestellt werden. Zweitens stellt er eine Reihe von Beispielen für Anordnungen und Baudetails zur Verfügung, die Grundlagen guter fachlicher Praxis darstellen. Diese Grundlagen stellen einen Richtwert dar, anhand dessen alternative Anordnungen und Bauteile bewertet werden können, indem die Gleichwertigkeitskriterien, die in diesem Teil der ISO 12215 beschrieben sind, benutzt werden.
ANMERKUNG Dimensionierungen, die sich aus diesem Teil von ISO 1215 ableiten, sind in erster Linie für Sportboote einschließlich gecharterter Sportboote gedacht und sind möglicherweise nicht für Leistungsrennboote geeignet.
Petits navires - Construction de coques et échantillonnages - Partie 6: Dispositions et détails de construction (ISO 12215-6:2008)
L'ISO 12215-6:2008 concerne les détails de construction et les éléments structurels non explicitement mentionnés dans l'ISO 12215-5, l'ISO 12215-7, l'ISO 12215-8 et l'ISO 12215-9. Elle est applicable aux petits navires monocoques et multicoques, en plastique renforcé de fibres, en alliages d'aluminium ou d'acier, en bois ou en tout autre matériau approprié pour la construction de bateaux, d'une longueur de coque inférieure ou égale à 24 m, conformément à l'ISO 8666.
L'ISO 12215-6:2008 remplit deux fonctions. Elle apporte d'abord une aide à l'ISO 12215‑5 en donnant des explications supplémentaires ainsi que des méthodes et formules de calcul. Elle donne ensuite un certain nombre d'exemples de dispositions structurelles et de détails de construction illustrant des principes de bonne pratique. Ces principes fournissent une base de référence par rapport à laquelle d'autres dispositions structurelles et détails de construction pourront se comparer, en utilisant les critères de référence spécifiés dans l'ISO 12215-6:2008.
Mala plovila - Konstrukcija trupa in zahtevane lastnosti - 6. del: Struktura in podrobnosti (ISO 12215-6:2008)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 12215-6:2008
01-julij-2008
Mala plovila - Konstrukcija trupa in zahtevane lastnosti - 6. del: Struktura in
podrobnosti (ISO 12215-6:2008)
Small craft - Hull construction and scantlings - Part 6: Structural arrangements and
details (ISO 12215-6:2008)
Kleine Wasserfahrzeuge - Rumpfbauweise und Dimensionierung - Teil 6: Bauanordnung
und Details (ISO 12215-6:2008)
Petits navires - Construction de coques et échantillonnages - Partie 6: Dispositions et
détails de construction (ISO 12215-6:2008)
Ta slovenski standard je istoveten z: EN ISO 12215-6:2008
ICS:
47.020.10 Ladijski trupi in njihovi Hulls and their structure
konstrukcijski elementi elements
47.080 ýROQL Small craft
SIST EN ISO 12215-6:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 12215-6:2008
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SIST EN ISO 12215-6:2008
EUROPEAN STANDARD
EN ISO 12215-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2008
ICS 47.080
English Version
Small craft - Hull construction and scantlings - Part 6: Structural
arrangements and details (ISO 12215-6:2008)
Petits navires - Construction de coques et échantillonnages Kleine Wasserfahrzeuge - Rumpfbauweise und
- Partie 6: Dispositions et détails de construction (ISO Dimensionierung - Teil 6: Bauanordnung und Details (ISO
12215-6:2008) 12215-6:2008)
This European Standard was approved by CEN on 3 February 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12215-6:2008: E
worldwide for CEN national Members.
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SIST EN ISO 12215-6:2008
EN ISO 12215-6:2008 (E)
Contents Page
Foreword.3
Annex ZA (informative) Relationship between this International Standard and the Essential
Requirements of EU Directive 94/25/EC .4
2
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SIST EN ISO 12215-6:2008
EN ISO 12215-6:2008 (E)
Foreword
This document (EN ISO 12215-6:2008) has been prepared by Technical Committee ISO/TC 188 "Small craft"
in collaboration with Technical Committee CEN/SS T01 "Shipbuilding and maritime structures", the secretariat
of which is held by CMC.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by October 2008, and conflicting national standards shall be withdrawn at
the latest by October 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EC Directive.
For relationship with EC Directive, see informative Annex ZA, which is an integral part of this document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 12215-6:2008 has been approved by CEN as a EN ISO 12215-6:2008 without any
modification.
3
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SIST EN ISO 12215-6:2008
EN ISO 12215-6:2008 (E)
Annex ZA
(informative)
Relationship between this International Standard and the Essential Requirements of
EU Directive 94/25/EC
This International Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide one means of conforming to Essential Requirements of
the New Approach Directive 94/25/EC as amended by Directive 2003/44/EC.
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a
presumption of conformity with the relevant Essential Requirements of that Directive and associated EFTA
regulations.
Table ZA.1 — Correspondence between this International Standard and Directive 94/25/EC as
amended by Directive 2003/44/EC
Clauses/sub-clauses of this Corresponding annexes/paragraphs of Comments
international Standard EU Directive 94/25/EC as amended by
Directive 2003/44/EC
All clauses Annex I, Part A, Clause 3.1, Structure The standard provides structural details
for monohull and multihull craft
constructed from fibre reinforced
plastics, aluminium or steel alloys,
wood or similar suitable materials.
WARNING — Other requirements and other EU Directives may be applicable to the products falling
within the scope of this standard.
4
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SIST EN ISO 12215-6:2008
INTERNATIONAL ISO
STANDARD 12215-6
First edition
2008-04-01
Small craft — Hull construction and
scantlings —
Part 6:
Structural arrangements and details
Petits navires — Construction de coques et échantillonnages —
Partie 6: Dispositions et détails de construction
Reference number
ISO 12215-6:2008(E)
©
ISO 2008
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SIST EN ISO 12215-6:2008
ISO 12215-6:2008(E)
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ii © ISO 2008 – All rights reserved
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SIST EN ISO 12215-6:2008
ISO 12215-6:2008(E)
Contents Page
Foreword. v
Introduction . vi
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Symbols .3
5 General.4
6 Structural arrangement .4
6.1 Stiffening .4
6.2 Hull girder strength.7
6.3 Load transfer.7
6.4 Determination of stiffener spans.11
6.5 Window mullions .13
6.6 Sailboat mast support .14
7 Specific structural details for FRP construction .14
7.1 Local reinforcement .14
7.2 Bonding .16
7.3 Major joints.21
7.4 Laminate transition.25
7.5 Sandwich construction .25
7.6 Attachment of fittings.25
7.7 Engine seatings and girders.25
7.8 Hull drainage .28
8 Specific structural details for metal construction.28
8.1 Design details.28
8.2 End connections.28
8.3 Increased hull plating.28
8.4 Protective keel.28
8.5 Hull drainage .29
8.6 Machinery spaces.29
8.7 Good practice welding standards.29
8.8 Good practice for riveting or adhesive bonding .29
9 Good practice on laminated wood.30
9.1 Edge sealing.30
9.2 Plywood orientation.30
9.3 Local scantlings.30
9.4 Alternative criteria .31
10 Consideration of other loads.31
11 Other structural components .31
11.1 General.31
11.2 Rudder structure and connection.31
11.3 Keel attachment .32
11.4 Introduction and distribution of rigging loads .32
11.5 Other structural components not considered in other parts .32
Annex A (normative) Structural arrangements for category C and D boats.33
© ISO 2008 – All rights reserved iii
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SIST EN ISO 12215-6:2008
ISO 12215-6:2008(E)
Annex B (informative) Determination of shear stresses within a stiffener with glued or
riveted joints. 35
Annex C (informative) Good practice welding procedure . 41
Annex D (informative) Longitudinal strength analysis . 47
Bibliography . 52
iv © ISO 2008 – All rights reserved
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SIST EN ISO 12215-6:2008
ISO 12215-6:2008(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 12215-6 was prepared by Technical Committee ISO/TC 188, Small craft.
ISO 12215 consists of the following parts, under the general title Small craft — Hull construction and
scantlings:
⎯ Part 1: Materials: Thermosetting resins, glass-fibre reinforcement, reference laminate
⎯ Part 2: Materials: Core materials for sandwich construction, embedded materials
⎯ Part 3: Materials: Steel, aluminium alloys, wood, other materials
⎯ Part 4: Workshop and manufacturing
⎯ Part 5: Design pressures for monohulls, design stresses, scantlings determination
⎯ Part 6: Structural arrangements and details
⎯ Part 7: Scantling determination of multihulls
⎯ Part 8: Rudders
⎯ Part 9: Sailing boats — Appendages and rig attachments
© ISO 2008 – All rights reserved v
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SIST EN ISO 12215-6:2008
ISO 12215-6:2008(E)
Introduction
The underlying reason for preparing this part of ISO 12215 is that standards and recommended practices for
loads on the hull and the dimensioning of small craft differ considerably, thus limiting the general worldwide
acceptability of boats.
The objective of this part of ISO 12215 is to achieve an overall structural strength that ensures the watertight
and weathertight integrity of the craft.
This part of ISO 12215 is considered to have been developed with the application of current practice and
sound engineering principles.
Considering future development in technology and boat types, as well as small craft currently outside the
scope of this part of ISO 12215, and provided that methods supported by appropriate technology exist,
consideration may be given to their use so long as equivalent strength to this part of ISO 12215 is achieved.
Dimensioning in accordance with this part of ISO 12215 is regarded as reflecting current practice, provided
that the craft is correctly handled in the sense of good seamanship and that it is equipped and operated at a
speed appropriate to the prevailing sea state.
vi © ISO 2008 – All rights reserved
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SIST EN ISO 12215-6:2008
INTERNATIONAL STANDARD ISO 12215-6:2008(E)
Small craft — Hull construction and scantlings —
Part 6:
Structural arrangements and details
1 Scope
This part of ISO 12215 concerns structural details and structural components not explicitly included in
ISO 12215-5, ISO 12215-7, ISO 12215-8 and ISO 12215-9. It applies to monohull and multihull small craft
constructed from fibre reinforced plastics (FRP), aluminium or steel alloys, wood or other suitable boat
building material, with a hull length, in accordance with ISO 8666, of up to 24 m.
This part of ISO 12215 fulfils two functions. Firstly, it supports ISO 12215-5 by providing further explanations
and calculation procedures and formulae. Secondly, it gives a number of examples of arrangements and
structural details which illustrate principles of good practice. These principles provide a standard against which
alternative arrangements and structural details can be benchmarked, using the equivalence criteria specified
in this part of ISO 12215.
NOTE Scantlings derived from this part of ISO 12215 are primarily intended to apply to recreational craft including
recreational charter vessels and might not be suitable for performance racing craft.
2 Normative references
The following referenced documents are indispensable for the application 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 8666, Small craft — Principal data
ISO 12215-5:2008, Small craft — Hull construction and scantlings — Part 5: Design pressures for monohulls,
design stresses, scantlings determination
ISO 12215-7, Small craft — Hull construction and scantlings — Part 7: Scantling determination of multihulls
ISO 12215-8, Small craft — Hull construction and scantlings — Part 8: Rudders
ISO 12215-9, Small craft — Hull construction and scantlings — Part 9: Appendages and rig attachment
ISO 12216, Small craft — Windows, portlights, hatches, deadlights and doors — Strength and watertightness
requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
loaded displacement mass
m
LDC
mass of the craft, including all appendages, when in the fully-loaded ready-for-use condition, as defined in
ISO 8666
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SIST EN ISO 12215-6:2008
ISO 12215-6:2008(E)
3.2
sailing craft
2/3
craft for which the primary means of propulsion is by wind power, and for which A > 0,07(m ) where
S LDC
A is the total profile area of all sails that can be set at one time when sailing closed hauled, as
S
2
defined in ISO 8666, expressed in m ;
m is the loaded displacement, as defined in ISO 8666, expressed in kg.
LDC
NOTE In this part of ISO 12215, non-sailing craft are referred to as motor craft.
3.3
grid
grillage
set of transverse stiffeners that intersect a set of longitudinal stiffeners
3.4
secondary stiffener
stiffening element that directly supports the plating
NOTE In a stiffener grillage, secondary stiffeners usually correspond to stiffeners having the lower second moment of
area, e.g. stringers, frames, partial bulkheads. The spacing of secondary stiffeners generally corresponds to the shortest
unsupported span of the attached plating. In the case of stiffeners with a substantial base width (i.e. top hat stiffeners), the
stiffener spacing will be the unsupported panel span plus this base width.
3.5
primary stiffener
stiffening element that supports the secondary stiffening element
NOTE 1 In a stiffener grillage, primary stiffeners usually correspond to stiffeners which have the higher second moment
of area, e.g. structural bulkheads, girders, web frames. The spacing of primary stiffeners generally corresponds to the
span of secondary stiffeners.
NOTE 2 Some stiffeners, such as bulkheads, deep girders or web frames, may also contribute to resisting global loads.
3.6
stringer
longitudinal stiffener, generally designated a secondary stiffener (3.4), which supports the shell plating
3.7
frame
transverse stiffener, generally designated a secondary stiffener (3.4), which supports the shell plating
3.8
beam
transverse stiffener, generally designated a secondary stiffener (3.4), which supports the deck plating
3.9
web frame
substantial transverse stiffener, generally designated a primary stiffener (3.5), which supports stringers and
less substantial girders and is usually connected with substantial deck beams
NOTE The spacing of web frames is usually greater than (or some multiple of) the frame or beam spacing.
3.10
floor
substantial transverse bottom stiffener, which may be used to link frames and may also be a partial bulkhead
NOTE Floors are often used to support a cabin sole, so the upper edge is generally horizontal. On sailing craft, floors
are traditionally used to support ballast keels.
2 © ISO 2008 – All rights reserved
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SIST EN ISO 12215-6:2008
ISO 12215-6:2008(E)
3.11
girder
substantial longitudinal stiffening element, generally designated a primary member, which supports bottom
transverse frames or floors, other frames and beams
NOTE Bottom girders are sometimes called keelsons.
3.12
bracket
stiffening element, usually of triangular shape, used to reinforce the connection of two stiffeners and to reduce
their span
NOTE Brackets are also used to transmit local loads.
4 Symbols
Unless specifically otherwise defined, the symbols and units used in this part of ISO 12215 are given in
Table 1.
NOTE Symbols and units used only in the annexes are not included in Table 1.
Table 1 — Symbols
Symbol Designation Unit
2
A Design area of plating/stiffener mm
D
b Spacing between stiffeners mm
b Width of bonding flange mm
w
B Beam of hull, in accordance with ISO 8666 m
H
D Maximum depth of the boat, in accordance with ISO 8666 m
max
2
E Elastic modulus of stiffener N/mm
f Mechanical property coefficient for FRP and aluminium alloys 1
1
f Mechanical property coefficient for wood 1
1w
4
I Second moment of stiffener cm
k , ., k Coefficients for reinforcing thickness calculation 1
0 2
k , k Glue width coefficient 1
j jmin
l Span of stiffeners mm
u
L Length of hull, in accordance with ISO 8666 m
H
L Length of waterline, in accordance with ISO 8666 m
WL
m Loaded displacement mass, in accordance with ISO 8666 kg
LDC
m Trailering mass, in accordance with ISO 8666 kg
T
P Maximum engine power kW
t Bottom plating thickness mm
b
t Thickness of plywood bulkhead mm
BHD
t Total thickness of top hat web mm
w
V Boat maximum speed in calm water knot
max
2
σ Design direct stress N/mm
d
2
σ Ultimate direct strength N/mm
u
2
τ Design shear stress N/mm
d
2
τ Ultimate shear strength N/mm
u
Ψ Glass content by mass 1
© ISO 2008 – All rights reserved 3
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SIST EN ISO 12215-6:2008
ISO 12215-6:2008(E)
5 General
Where the load and scantling determination have been accomplished for craft with a hull length, L , of
H
between 2,5 m and 24 m in accordance with
⎯ ISO 12215-5 for design pressure for monohulls and scantlings determination,
⎯ ISO 12215-7 for multihulls,
⎯ ISO 12215-8 for rudders, and
⎯ ISO 12215-9 for appendages and rig attachment,
structural arrangements and details shall comply with Clauses 6 to 11.
Where one of the two following methods prescribed in ISO 12215-5 have been used, the craft need only
comply with the requirements of Annex A:
a) for sailing craft with a length, L , of between 2,5 m and 9 m of design categories C and D, where
H
ISO 12215-5:2008, Annex A, has been used;
b) for craft with a length, L , of between 2,5 m and 6 m and of single skin FRP bottom construction, where
H
ISO 12215-5:2008, Annex B, has been used.
6 Structural arrangement
6.1 Stiffening
6.1.1 General
The hull, deck and deckhouse plating shall be stiffened as necessary to comply with ISO 12215-5, by any
combination of longitudinal and transverse conventional stiffeners, structural bulkheads, internal furniture such
as berths and shelves, and internal tray mouldings, providing these may be considered as “load bearing”. The
arrangement is usually made with stiffeners supported by deeper and stronger stiffeners, crossing
perpendicularly.
NOTE For small boats, “natural stiffeners” (i.e. elements that add stiffness, even if not dedicated for the purpose; see
ISO 12215-5:2008, 9.14), e.g. deck edge, round bilges, hard chines, keel, can define panels that need no further
stiffening.
Figures 1, 2 and 3 illustrate characteristic arrangements that comply with good practice. These figures apply
to both sailing and non-sailing craft, and combinations of arrangement within a single craft are acceptable.
Small boats (generally those of hull length less than about 9 m in length) employ natural stiffeners such as
deck edge, round bilges, hard chines, keel, etc. to define panels and then need no further stiffening. Larger
craft generally need to make greater use of the stiffener types described in 3.3 to 3.12.
6.1.2 Equivalence criteria
Other arrangements are possible, but these shall follow good practice principles (as illustrated by Figures 1, 2
and 3) of effective and smooth transmission of stresses due to pressure loads and concentrated loads (mast,
keel, rudder, etc) from the load point into the supporting structure (see 6.3 and 6.4).
6.1.3 Longitudinally framed boat
In the example in Figure 1, the hull shell is stiffened by longitudinal secondary stiffeners supported by
transverse primary stiffeners, such as web frames, bulkheads and deep floors. The example given is typical
for an FRP boat.
4 © ISO 2008 – All rights reserved
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SIST EN ISO 12215-6:2008
ISO 12215-6:2008(E)
6.
...
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