Box 88-1 sent companies to 201 N. Catherine Street between E. Water and Detweiler Streets for a structure fire around 2045 hours. PD on scene confirming a working fire. Command 88 had heavy smoke from an occupied, 3 story, duplex and requested the first alarm. Crews made a good knock on a second floor fire with extension to the third floor and roof area. The fire was placed under control in about 45 minutes with special calls made for manpower.