The rotation-controllable tower-crane hook block is the automated construction equipment able to rotate a steel beam in a horizontal direction. This paper estimates the economic impact of safety improvement when this equipment is deployed at construction fields. An analysis on industrial accidents shows that accidents related to steel structures make up 4.78% of total building construction accidents. This paper employed real discount rate and present worth of annuity (PWA) assessments to convert future cash flow into present worth. For this, the economic benefits were analyzed by including a reduction in the accident rate compared with manufacturing costs. The cost-benefit ratio was 1.142, demonstrating the economic feasibility of the equipment. In addition, sensitivity and qualitative benefits analyses were conducted.