Often lack of fusion adjacent to the girder web in the transverse groove welds led to the cracking. 在靠近主梁腹板的横向坡口焊缝处常常出现未熔透而导致裂纹。
At the top flange there would be enough slack so that no relative twist of any significant magnitude would be introduced into the girder web. 在上翼缘处有足够的松动，因而在主梁腹板上并不会引起很大的相对扭转。
