ISO 19624:2018
Bamboo structures — Grading of bamboo culms — Basic principles and procedures
This document specifies grading procedures for visually and mechanically sorting round, or pole, bamboo for structural applications using such fundamental elements. Visual sorting is based on observable characteristics of the piece(s). Mechanical sorting is based on non-destructive measurement of properties known to correlate to characteristic values defining a grade.
The grading procedures in this document can be used in a quality acceptance regime, although this document does not define or address acceptance criteria.
This document is applicable only for bamboo that is graded in the seasoned state.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 General
5.1 Grading
5.2 Grades
5.3 Graded bamboo culms
5.4 Grading operations
5.5 Secondary properties
6 Visual grading
6.1 General
6.2 Visual grading requirements
6.2.1 General
6.2.2 Condition properties
6.2.3 Geometric properties
6.3 Other requirements for visual grading
6.3.1 Moisture content
6.3.2 Age at harvesting
6.4 Check on visual grading process
7 Machine grading
7.1 General
7.2 Machine grading process requirements
7.3 Indicating properties
7.4 Grade-determining properties
7.5 Visual override
7.6 Hybrid grading methods
8 Structural properties of graded bamboo
8.1 General
8.2 Initial evaluation
8.2.1 Developing visual grading rules
8.2.2 Developing grading settings for machine grading
8.2.3 Sampling
8.2.4 Sample size for initial evaluation
8.2.5 Other considerations during initial evaluation testing
8.3 Periodic evaluation
8.4 Reduced test programmes and secondary properties
9 Product identification
10 Documentation
Annex A (informative) Example of application of clauses in this document to a visual grading standard for bamboo culms based on external diameter and flexural properties
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 General
5.1 Grading
5.2 Grades
5.3 Graded bamboo culms
5.4 Grading operations
5.5 Secondary properties
6 Visual grading
6.1 General
6.2 Visual grading requirements
6.2.1 General
6.2.2 Condition properties
6.2.3 Geometric properties
6.3 Other requirements for visual grading
6.3.1 Moisture content
6.3.2 Age at harvesting
6.4 Check on visual grading process
7 Machine grading
7.1 General
7.2 Machine grading process requirements
7.3 Indicating properties
7.4 Grade-determining properties
7.5 Visual override
7.6 Hybrid grading methods
8 Structural properties of graded bamboo
8.1 General
8.2 Initial evaluation
8.2.1 Developing visual grading rules
8.2.2 Developing grading settings for machine grading
8.2.3 Sampling
8.2.4 Sample size for initial evaluation
8.2.5 Other considerations during initial evaluation testing
8.3 Periodic evaluation
8.4 Reduced test programmes and secondary properties
9 Product identification
10 Documentation
Annex A (informative) Example of application of clauses in this document to a visual grading standard for bamboo culms based on external diameter and flexural properties
Bibliography