第8号技术摘要的第二版由钢托梁研究所工程实践委员会的一个特设小组编制，是对之前编写的摘要的广泛更新。技术文摘第8号详细说明了SJI成员公司在制造钢托梁和托梁时必须遵守的要求，并向读者提供了SJI成员公司目前和以前使用的各种焊接工艺和焊接类型以及焊接设计的信息。摘要中经常提到美国焊接协会（AWS）的焊接规范。符合AWS标准将满足SJI焊接要求，在许多情况下，SJI要求符合特定的AWS规定。然而，也存在一些差异。SJI保留自己的焊接规范语言的原因在本文件中进行了讨论。

This Second Edition of Technical Digest No. 8 has been developed by an Ad-Hoc Group of the Steel Joist Institute's Engineering Practice Committee and is an extensive update of the previously written digest. Technical Digest No. 8 details the requirements that the SJI member companies must follow in the manufacturing of steel joists and Joist Girders and provides the reader information on the various types of welding processes and weld types, and weld designs currently and previously used by SJI member companies. Frequent reference has been made throughout the digest to the American Welding Society (AWS) Welding Specifications. Compliance with AWS criteria will satisfy the SJI welding requirements, and in many cases the SJI requirement is in compliance with a particular AWS provision. However, there are some differences. The reasons for the SJI to maintain their own specification language for welding is discussed throughout this document.