本文件规定了弯曲应用中用作结构构件的预制木质工字梁的部件性能和制造要求。它不包括防火性能、甲醛要求和生物耐久性。 本文件给出了预制木质工字梁的制造、内部质量保证和定期重新评估的要求。 根据本文件测试的木质工字梁适用于覆盖条件，并使用能够抵抗因施工延误或其他类似严重条件而导致的湿气对结构性能的影响，但不会永久暴露在天气中的组件。 注:服务条件类似于ISO 20152中定义的“服务等级2”1. 预制木质工字梁的测试、评估和性能表征要求见ISO 223891. 本文件并不旨在解决与其使用相关的所有安全问题（如有）。本文件的使用者有责任在使用前制定适当的健康和安全规程，并确定监管限制的适用性。

This document specifies the component performance and manufacturing requirements for prefabricated wood-based I-beams used as structural members in bending applications. It does not cover fire performance, formaldehyde requirements and biological durability. This document gives requirements for manufacturing, in-house quality assurance and periodic re-evaluation of prefabricated wood-based I-beams. Wood-based I-beams tested according to this document are intended for use in covered conditions and utilizing components that are able to resist the effects of moisture on structural performance due to construction delays or other conditions of similar severity, but not permanently exposed to the weather. NOTE The service conditions are similar to "Service class 2" as defined in ISO 20152？1. Testing, evaluation and performance characterization requirements for prefabricated wood-based I-beams are covered in ISO 22389？1. This document does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this document to establish appropriate health and safety practices and determine the applicability of regulatory limitations prior to use.