A jib boom hinge pin on a 50 ton crane knocked a 2.5""x2.5"" pc of angle from #1 breaker bldg causing angle to fall to the ground. The injured EE was standing near the base of crane and the angle stuck him in the neck/shoulder area fracturing his clavicle and straining vertebrae in neck. EE was taken to hospital in Morgantown, WV and released the next day. This is a LTI.