ISO 3129:1975 木材.物理和机械试验的取样方法和一般要求

标准编号：ISO 3129:1975

中文名称：木材.物理和机械试验的取样方法和一般要求

英文名称：Wood — Sampling methods and general requirements for physical and mechanical tests

发布日期：1975-11

标准范围

规定选择性和机械取样、选定材料的调节和试样的制备。如果已知一棵树和一个物种的两棵树之间的木材特性变异系数，并且可以从大量树木、原木和锯材中进行选择，则应使用选择法；如果已知上述系数的平均值，并且只能从有限数量的树木中进行选择，则应使用机械法，原木和锯材。

Specifies the selective and mechanical sampling, conditioning of selected material and the preparation of test pieces. Selective method 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 selection is possible from a large number of trees, logs and pieces of sawn timber, and the mechanical method when the mean values of the above coefficients are known and selection is possible only from a limited number of trees, logs and pieces of sawn timber.

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