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BS EN ISO 12215-10:2020

BS EN ISO 12215-10:2020

$215.11

Small craft. Hull construction and scantlings – Rig loads and rig attachment in sailing craft

Published By Publication Date Number of Pages
BSI 2020 88
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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 L H. 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.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
11 4 Symbols
12 5 Application of the document
5.1 General
5.2 The simplified method
5.3 The developed method
13 5.4 Steps of the methods and corresponding clauses of this document
14 6 Simplified and developed methods — Design stresses
6.1 General
15 6.2 Design load vs safety factor
16 7 Developed method — General assessments, design moment
7.1 General
7.1.1 General topics on rigging design
17 7.1.2 Sail configurations:
7.1.3 Rigging loads and adjustment information to be provided
18 7.2 Design moment MD: righting or heeling moment
7.2.1 General
7.2.2 Principle of design
21 7.2.3 Topics on multihulls/form stable sailing craft corresponding to case b) i.e. with MH1 < MR UP1
22 7.2.4 Downwind longitudinal force FADOWN and nose trimming moment MHDOWN, running under spinnaker alone — “Normal” (Sc6) or “exceptional” (Sc8)
7.2.5 Maximum righting moment MRMAX, exceptional case, reaching under spinnaker
7.2.6 Heeling force FABROACH and heeling moment MHBROACH while broaching under spinnaker, exceptional case
7.2.7 Minimum sail configuration and righting/heeling moment to be analyzed
23 7.3 Rig dimensions, and default values for areas, forces and points of application
29 7.4 Wing masts
30 7.5 Resultant forces in sails
31 8 Loads in rigging elements — Developed method
8.1 General
8.2 Force in forestay, inner forestay, mainsail leech and on halyards
8.2.1 General
32 8.2.2 Force in forestay, inner forestay, mainsail leech and on halyards connected with sag
8.2.3 Force in forestay to balance the longitudinal component of forces from aft set shrouds, fixed/running backstays, mainsail leech
8.3 Force in backstay, running backstays, or equivalent
8.3.1 General
33 8.3.2 Fractional rig with fixed backstay, no running backstay and aft angled spreaders
8.3.3 Case of rigs without fixed nor running backstay
35 8.4 Compression in the mast step/pillar
8.4.1 General
8.4.2 Initial mast compression due to pre-stressing
36 8.4.3 Mast compression due to heeling or broaching
8.4.4 Design compression in the mast step/pillar
8.4.5 Detail topics on mast step/pillar
8.5 Final design load on rig elements
37 9 Structural components to be assessed — Simplified or developed method
9.1 General
9.2 Mast steps and mast pillars and their connection to the craft’s structure
9.3 Chainplates and their connections to the craft’s structure
38 9.4 Design details of chainplates and their connection to the structure
9.4.1 General
9.4.2 Strapped FRP chainplates
39 10 Application of the simplified method
11 Application of the developed method
11.1 General
11.2 General guidance for assessment by 3-D numerical procedures
11.2.1 General
40 11.2.2 Material properties
11.2.3 Boundary assumptions
11.2.4 Load application
11.2.5 Model idealization
11.3 Assessment by ‘strength of materials’ based methods
12 Application of this document
13 Information in the owner’s manual
41 14 Information to the boat builder
42 Annex A (informative) Application sheet of ISO 12215-10
44 Annex B (informative) Information on metals and bolts
48 Annex C (normative) Simplified “established practice” for mast step/pillar assessment
55 Annex D (normative) Simplified “established practice” for the assessment of chainplatesand their connection
77 Annex E (informative) Simplified “established practice” calculation oftransverse rig elements — Examples
85 Bibliography

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BS EN ISO 12215-10:2020
$215.11