PS 1545-1982 木材．抽样和物理力学测试的一般要求

标准号：PS 1545-1982
中文标准名称：木材．抽样和物理力学测试的一般要求
英文标准名称：WOOD—SAMPLING METHODS AND GENERAL REQUIREMENTS FOR PHYSICAL AND MECHANICAL TFSTS
发布日期：1982/1/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This Pakistan Standard specifies methods for the slective and mechanical sampling of wood, for the conditioning of selected material and for the preparation of test pieces. In addition, it specifies the general requirements for physical and mechanical tests on small, clear test pieces free from visible defect〓.1.2 The selective method of sampling should be used in cases where the coefficients of variation of the wood properties for one tree and between trees of one species are known and where it is possible to select material for samples from a large number of trees, logs and pieces of sawan timber.1.3 The mechanical method of sampling should be used in cases where the mean values of the coefficients of variation of the wood properties are known and where it is possible to select material for samples only from a limited number of trees, logs and pieces of sawn timber.