After each imprinting is complete the bits are rearranged to develop a new number and the process is repeated on a new slab of steel. An additional, duty of the employees is to nail a cover over post-casting applied numbers which are not legible. This is accomplished using a pneumatic nail gun. The employee holds the cover sheet over the illegible number and uses the nail gun to secure it into place. Employees can adjust the height of the slab with the use of a height adjustable mechanism which is present at the station.
Employees appear to stand for the duration of the task.
It is difficult to determine the absolute number of repetitions, or period of time that a posture can be maintained or an activity performed, which will cause an injury. But the risk of injury is definitely increased as static posture times or repetitions of a movement are increased. There are sufficient frequencies of stressors associated with this task to cause musculoskeletal injuries unless adequate engineering and administrative controls are implemented. Many of the engineering controls will be addressed in the following sections. Some administrative controls are mentioned below.