ISO 22157:2019 Bamboo structures – D etermination of physical and mechanical properties of bam boo culms – Test methods

ISO 22157:2019 Bamboo structures – D etermination of physical and mechanical properties of bam boo culms – Test methods. This document specifies test procedures for specimens obtained from round bamboo cuims. The data obtained from the test methods can be used to establish characteristic physical or mechanical properties to be used in structural engineering design or for other scientific purposes. This document provides methods for evaluating the following physical and strength properties: moisture content, density, mass per unit length; strength properties parallel to the fibre direction, compression, tension and bending, and strength properties perpendicular to the fibre direction, tension and bending. It also provides methods to estimate moduli of elasticity in bending, compression and tension parallel to fibres, and bending perpendicular to fibres. The test methods reported in this document are intended for commercial testing applications. The test methods reported in this document are intended for commercial testing applications and can also be adopted as benchmark methods for scientific research. This document is organized to provide requirements for standard tests to be carried out to determine the material properties of full-cuim bamboo as a structural material. 2 Normative references There are no normative references in this document. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain term inological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://www.electropedia.org/ 3.1 bamboo culm single shoot of bamboo comprised of the entire unaltered bamboo cross-section, which is usually a hollow cylinder except at nodes (3.11) 3.2 bamboo clump clump cluster of bamboo shoots emanating from two or more rhizomes at the same location 3.3 cross-sectional area A area of the net section perpendicular to the direction of the longitudinal axis of the cuim 3.4 equilibrium moisture content moisture content (3.10) at which bamboo is neither gaining moisture from, nor losing moisture to, the environment.ISO 22157 pdf download.