3.2.1 is expanded to include: Surfaces on which flange-to-web welds are made shall be cleaned in the immediate weld area by power wire wheel brushing, grinding, or other methods approved by the Engineer. (3) Section 6, Part B, Radiographic Testing of Groove Welds in Butt Joints is expanded to include: Edge blocks shall be used when radiographing butt welds greater than 1/2 (12 mm) thickness.