After the root pass is completed, the pair of welders moves on to the next joint, and a new pair begins the second pass, called the “hot pass”., 1976-07, PCA0002-2b-17, Folder: PCA0002-2b. Alyeska Pipeline Service Company : Trans-Alaska Pipeline Construction Collection, 1976-1977, PCA 2. Alaska State Library - Historical Collections Finding Aids. https://alaska.libraryhost.com/repositories/2/archival_objects/17516 Accessed February 22, 2025.