Hong Kong should review its crane safety guidelines to include mandatory testing for metal fatigue, an industry expert has said after the city recorded another fatal case involving a collapse.An operator was killed on Thursday afternoon when a tower crane fell at a construction site for the second phase of a public housing project on Tai Wo Hau Road, toppling onto a slope opposite Pik Kwai House at Kwai Chung Estate.The project’s main contractor, Woon Lee Construction, was previously fined by...