ISO 12122-6:2017 PDF

Timber structures — Determination of characteristic values — Part 6: Large components and assemblies

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Title (English):

ISO 12122-6:2017

Timber structures — Determination of characteristic values — Part 6: Large components and assemblies

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 23
Publication date:: August 9, 2017
Edition:: ISO IS 12122 edition 1 version 1
ICS:: 91.080.20

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Description (English):

ISO 12122-6:2017 specifies methods of determination of characteristic values for a defined population of large components and assemblies, calculated from test values. It establishes two methods for the determination of characteristic values: a) direct calculation from test values; b) calculation from a resistance model, which is firstly calibrated from test results, including calculation of error terms.

Technical details

Technical committee: ISO/TC 165 - Timber structures
SKU: ISO 12122-6:2017

Abstract

Overview

ISO 12122-6:2017 - Timber structures: Determination of characteristic values - Part 6: Large components and assemblies defines statistical and experimental procedures for deriving characteristic structural values from tests on large timber components and assemblies. It complements ISO 12122-1 and is intended for cases where test programmes create a defined reference population of large, assembled structural parts. The standard recognizes the special statistical challenges of small sample sizes typical for large-component tests.

Key topics and requirements

Two accepted methods for determining characteristic values:
- Direct calculation from test values (statistical fractile estimate - normal or log‑normal fits).
- Calculation from a resistance model calibrated by test results, including quantification of error terms and uncertainty.
Test plan and reference population: Document objectives, predicted behaviour, specimen specification, sampling, boundary conditions, loading and measurement protocols, and evaluation/reporting procedures.
Sampling and specimen conditioning: Samples must represent the real structure (dimensions, fabrication, restraints); conditioning per ISO 12122-1.
Testing requirements: Specify loading points, time history, restraints, environment (temperature, humidity), and whether load or displacement control is used; ensure rig stiffness and clearance for deflections.
Statistical treatment:
- Address scatter of results, statistical uncertainty from limited n, and prior knowledge.
- Use a sampling factor k for 5% characteristic values (table values provided in the standard).
- For n

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and requirements

Two accepted methods for determining characteristic values:
- Direct calculation from test values (statistical fractile estimate - normal or log‑normal fits).
- Calculation from a resistance model calibrated by test results, including quantification of error terms and uncertainty.
Test plan and reference population: Document objectives, predicted behaviour, specimen specification, sampling, boundary conditions, loading and measurement protocols, and evaluation/reporting procedures.
Sampling and specimen conditioning: Samples must represent the real structure (dimensions, fabrication, restraints); conditioning per ISO 12122-1.
Testing requirements: Specify loading points, time history, restraints, environment (temperature, humidity), and whether load or displacement control is used; ensure rig stiffness and clearance for deflections.
Statistical treatment:
- Address scatter of results, statistical uncertainty from limited n, and prior knowledge.
- Use a sampling factor k for 5% characteristic values (table values provided in the standard).
- For n

ISO 12122-6:2017 PDF

Technical details

Abstract

Overview

Key topics and requirements

Related standards

Abstract

Overview

Key topics and requirements

Related standards

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