BS ISO 19624:2018 pdf free

BS ISO 19624:2018 pdf free.Bamboo structures – Grading of bamboo culms – Basic principles and procedures
Grading is the process of sorting every piece of bamboo in a sample into grades according to defined selection criteria. The criteria identify dimensional, visual, geometric, mechanical and/or physical properties that reflect the bamboo’s mechanical strength or structural capacity and may affect the utility of the product.
Each grade is associated with a range of mechanical, geometric, physical and/or structural properties derived from testing. The selection criteria are based on non-destructive observations and measurements that have been established to be useful to the grading process.
Grading provides a statistically significant prediction of the mechanical, geometric and/or physical properties of the population within a grade, but does not provide the properties of each individual piece.Grading is not proof testing. Proof testing can be carried out to increase confidence in selected material,if desired. Proof testing is beyond the scope of this document.
The sorting criteria for a given grade should reliably infer the properties selected as the basis of the grading process. A grade can be set to correspond to a particular bamboo resource in order to make optimum use of the resource. Alternatively, a grade can be set to meet the requirements of a particular end use or specification.
Graded bamboo culms are dry (or seasoned) lengths of bamboo in their round form that have been subjected to a grading process. It should not be assumed that products derived from graded bamboo culms, such as strips or laminates, are also graded; such products would need to be subjected to a separate grading process beyond the scope of this document.
Secondary properties are physical or mechanical properties for a given grade that are neither measured nor inferred directly from the grading process. Secondary properties should not be critical to the end application of the culms. These properties are usually estimated from the grade-determining properties on the basis of previously derived correlations that are valid for the specific species.BS ISO 19624 pdf free download.