SIST EN ISO 12215-10:2021 PDF

Overview

SIST EN ISO 12215-10:2021 (ISO 12215-10:2020) is the international / European standard that specifies methods for determining rig loads, design stresses, and scantlings for rig attachments on sailing craft. It applies to monohulls and multihulls with hull length (LH) up to 24 m (and may be applied relative to 24 m load line length). The standard is intended mainly for recreational craft - including charter vessels - and excludes craft designed solely for professional racing. Only loads while sailing are considered.

Key topics and technical requirements

• Design loads and design stresses: Defines how to determine loads acting on rig elements (stays, shrouds, halyards, mast, etc.) and the corresponding design stresses to be used in structural assessment.
• Methods: Presents a simplified method and a developed method (detailed procedures) for load determination and scantlings, with clear steps and when to apply each.
• Rig attachments and mast supports: Requirements for sizing and assessing chainplates, mast steps / pillars, and their connections to the craft’s structure.
• Specific load cases: Coverage of forestay/backstay forces, halyard loads, resultant sail forces, heeling and righting moments, downwind and broaching scenarios, and mast compression (including pre-stress).
• Design data & units: Default values, areas, points of application and units are specified (m, m2, kg, N, N·m, N/mm2). Craft are assessed in fully loaded, ready-for-use condition.
• Annexes with established practices: Normative and informative annexes provide simplified “established practice” procedures for mast step/pillar and chainplate assessment and worked examples.
• Analysis options: Allows other engineering methods provided the standard’s design loads and stresses are used; guidance is given for 3‑D numerical procedures and strength-of-materials checks.

Practical applications and users

Who uses this standard:

• Naval architects and marine engineers - for structural design and scantlings of rigs and attachments.
• Boat builders and manufacturers - to size mast steps, pillars, chainplates and define construction details for recreational craft.
• Surveyors and certification bodies - to assess compliance and safety of rigging attachments.
• Refit yards and structural analysts - for evaluating modifications, repairs or uprated sailplans.
• Charter operators and owners - for understanding rig limitations and required information in owner’s manuals.

Practical uses:

• Sizing and detailing of chainplates, mast steps, pillars and their structural connections.
• Determining loads for material selection, fastener specification and finite-element analysis.
• Preparing information for owner’s manuals and builder documentation.
• Supporting regulatory compliance where EN ISO adoption is required.

Related standards

• Part of the ISO 12215 series (small craft - hull construction and scantlings). This document is prepared by ISO/TC 188 and adopted as EN ISO 12215-10:2020 by CEN.

Keywords: SIST EN ISO 12215-10:2021, ISO 12215-10, rig loads, rig attachment, sailing craft, mast steps, chainplates, scantlings, small craft, hull construction.