The Orwigsburg Fire Department was dispatched to Schuylkill Gun Works at 20 West Main Street, in Schuylkill Haven to a working commercial fire. Haven firefighters encountered a well involved fire in the rear of the building. A large Mutual Aid Assignment provided assistance to the Schuylkill Haven Fire Department. The crew of E-5610 assisted with the fire attack and overhaul operations. A Cressona firefighter stepped through a weak spot in a floor leading to a MayDay call. He was removed from the building by a RIT Team and transported to an area hospital by EMS. OFD cleared the scene at 20:45 hours.