本欧洲标准列出了木材的视觉等级，种类和来源，并指定了其分配的强度等级，如EN 338中所述。 注意对于包括的等级，物种和来源，有很长的使用历史和/或令人满意的测试数据。因此列出的来源主要取决于现有的商业惯例

This European Standard lists the visual grades, species and sources of timber, and specifies the strength classes to which they are assigned, as documented in EN 338. NOTE For the grades, species and sources included, there is a long history of use and/or satisfactory test data. The sources listed therefore are largely determined by existing commercial practices.